CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Volume rendering is a technique for visualizing 3D arrays of sampled data. It has applications in areas such as medical imaging and scientific visualization, but its use has been limited by its high computational expense. Early implementations of volume rendering used brute-force techniques that require on the order of 100 seconds to render typical data sets on a workstation. Algorithms with optimizations that exploit coherence in the data have reduced rendering times to the range of ten seconds but are still not fast enough for interactive visualization applications. In this thesis we present a family of volume rendering algorithms that reduces rendering times to one second. First we present a scanline-order volume rendering algorithm that exploits coherence in both the volume data and the image. We show that scanline-order algorithms are fundamentally more efficient than commonly-used ray casting algorithms because the latter
Volume Rendering utilizing Design Equipment Travis Gorkin GPU Programming and Engineering, June 2009 Motivation Volume Rendering Foundation Volumetric Information Optical Model Amassing Comparisons Volume Rendering on the CPU Raymarching Calculation Volume Rendering on Representation Equipment
The software platform for advanced life science research, Leica Application Suite Advanced Fluorescence (LAS AF), originally launched in 2005 for Leica Microsystems widefield and confocal microscope systems, has been released in its 3.2 version. This version focuses on 3D analysis, 3D measurements and 3D visualization.
Provided is a surgery assistance system to perform relatively fast and accurate alignment between three-dimensional surface shape data acquired by measurement using a three-dimensional surface shape scanner and three-dimensional internal shape data acquired in advance, even when the position of the patient and the surface shape of the skin of the patient change during the surgery. A surgery assistance system ( 1 ) includes a three-dimensional surface shape scanner ( 20 ) for acquiring three-dimensional surface shape data by measuring a three-dimensional surface shape of a patient ( 60 ) and a computing device ( 40 ) for processing the data from the three-dimensional surface shape scanner. The computing device stores therein three-dimensional internal shape data of the patient that is acquired in advance by measurement using a three-dimensional tomography scanner ( 30 ). The computing device has a unit that aligns the three-dimensional internal shape data and the three-dimensional surface shape
Zonal changes in the three-dimensional morphology of the chondron under compression: the relationship among cellular, pericellular, and extracellular deformation in articular cartilage ...
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A new study has suggested that between 2000 and 2009, the musculoskeletal (MSK) ultrasound volume increase among non-radiologists was much higher than among radiologists.
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Dynamic volume rendering of the beating heart is an important element in cardiac disease diagnosis and therapy planning, providing the clinician with insight into the internal cardiac structure and functional behavior. Most clinical applications tend to focus upon a particular set of organ structures, and in the case of cardiac imaging, it would be helpful to embed anatomical features into the dynamic volume that are of particular importance to an intervention. A uniform transfer function (TF), such as is generally employed in volume rendering, cannot effectively isolate such structures because of the lack of spatial information and the small intensity differences between adjacent tissues. Explicit segmentation is a powerful way to approach this problem, which usually yields a single binary mask volume (MV), where a unit value in a voxel within the MV acts as a tag label representing the anatomical structure of interest (ASOI). These labels are used to determine the TF employed to adjust the ...
Lokeren, Belgium, June 3rd, 2018. Orbit GT releases major upgrade of 3D Mapping Cloud SaaS platform.. This is quite some upgrade : full of new capabilities at very agressive prices,, says Peter Bonne, CEO of Orbit GT. With this upgrade, 3D Mapping Cloud basically renders all other platforms obsolete. Weve got all Reality Capture systems covered, weve got multi-sensor systems covered, weve got real time fusion and CRS transformation covered, and now we throw in 100GB free storage and 5 free guest users for everyone.. 3D Mapping Cloud is Orbit GTs SaaS platform designed to host, process and share massive volumes of LiDAR, Imagery and other reality capture data, however it has been collected. It supports high resolution street-level or Indoor Mobile Mapping up to aerial Oblique mapping, each with fully automated adapted viewer behavior. Data can be shared informally using a 1-click Bookmark, or via a formal nicely setup Publication.. This new upgrade also inlcudes a single user subscription ...
Acoustical data are usually displayed as two-dimensional echograms - vertical dimension through the water column, and time or distance along the horizontal axis. These echograms are used for viewing and evaluating the data. We have developed three-dimensional visualizations of multi-frequency acoustic data to view the data in geographical space from small to large spatial scales (3D Echograms). Acoustic data are commonly used to provide relative indices of species-specific abundance and biomass. In order to scale the relative indices to absolute estimates, we must incorporate a measure of the echo amplitude from an individual fish (3D Modeling). Fish are complicated acoustic scatterers by nature of their complex anatomy and behavior. We have developed three-dimensional visualizations of the fish body and swimbladder from x-ray and Computerized Tomography (CT) images (3D Computerized Tomography). These images are used in theoretical models to improve prediction of acoustic scattering over a ...
Among all digital representations we have for real physical objects, 3D is arguably the most expressive encoding. 3D representations allow storage and manipulation of high-level information (e.g. semantics, affordances, function) as well as low-level features (e.g. appearance, materials) about the object. Exploiting this 3D structure promises to improve our ability to build machines and autonomous agents that sense, understand, and act on the physical world around us. Historically, 3D visual computing has predominantly focused on single 3D models or small model collections. Now, however, with the advent of large 3D repositories of object models and inexpensive 3D scanning, the opportunity arises to re-define the field from the perspective of 3D big data.. In this talk, I will discuss a series of efforts on data-driven 3D visual computing, including constructing an information-rich large-scale 3D model repository (ShapeNet), generating synthetic data for supervising neural networks ...
February 2, 2010 - Two protocols for reduced-dose cardiac imaging, without compromising image quality, may help enhance the performance of gamma cameras by shortening acquisition times, enabling reduced radiopharmaceutical doses and increasing image resolution.. Nuclear medicine image reconstruction software maker UltraSPECT said its imaging protocols minimize radiation exposure to patients and staff, in addition to mitigating the impact of the technetium-99 (Tc-99m ) isotope shortage. The companys FDA-cleared and CE mark-approved Xpress.Cardiac and Xpress3.Cardiac products allow the utilization of lower dose imaging protocols with no compromise in imaging acquisition times and outcomes. UltraSPECT products feature connectivity to the imaging systems of all three major nuclear medicine camera manufacturers, supporting most existing camera hardware and workstation versions. With the Xpress.Cardiac clinicians can apply the one-day rest/stress protocol, with scan times as defined by the ASNC ...
FOR IMMEDIATE RELEASE: WOODSIDE, CA: March 12, 2004: To determine if a saddle FITS a horses back, the laws of geometry require the comparison of all three (3) dimensions, of both surfaces, in relationship to each other. Unfortunately, saddles are not measured in three-dimensions. There is Gullet Width and Seat Length, but there are no standardized three-dimensional measurements to be able to relate the curvature of the horses backs to the shapes of saddles. This lack of an accurate calibrated measurement method is the reason why Equestrians have such difficulty finding a saddle to FIT their horse. To solve this challenge SADDLETECH has just released a new and improved MK I I edition of the CLASSIC SADDLETECH GAUGE that was originally released in 1997. The SADDLETECH GAUGE Mk I I is a simple mechanical instrument that permits the polyform of the shape of horses back and corresponding saddle to be defined by angles and arcs, providing the three-dimensional measurements required to determine ...
The Global 3D Rendering and Virtualization Software market is expected to grow at a CAGR of 21.4 percent over the period 2011-2015. One of the key factors contributing to this market growth is the increasing demand from the global Entertainment industry. The Global 3D Rendering and Virtualization Software market has also been witnessing an increasing focus on virtualization software. However, increasing popularity of open source communities could pose a challenge to the growth of this market ...
Debatin, Maurice, Stsepankou Dzimitry, and Jürgen Hesser. 2013. Ct Reconstruction From Few-Views By Higher Order Adaptive Weighted Total Variation Minimization. Proc. Intl. Mtg. On Fully 3D Image Reconstruction. Proc. Intl. Mtg. On Fully 3D Image Reconstruction. Proc. Intl. Mtg. on Fully 3D Image Reconstruction ...
Bardeen, C., O. B. Toon, E. Jensen, M. E. Hervig, C. E. Randall, S. Benze, D. R. Marsh, and A. Merkel (2010), Numerical simulations of the three-dimensional distribution of polar mesospheric clouds and comparisons with Cloud Imaging and Particle Size (CIPS) experiment and the Solar Occultation For Ice Experiment (SOFIE) observations, J. Geophys. Res., 115, D10204, doi:10.1029/2009JD012451 ...
Filtered Back Projection (FBP) algorithms are suited for applications where an image needs to be reconstructed accurately and in near real-time. iTomographys CTO, Prof. Alexander Katsevich, made a revolutionary breakthrough in CT imaging by developing the first fast and exact 3D image reconstruction algorithm (Katsevich Algorithm). Advances inspired by this result are utilized in the vast majority of 3D scanners deployed today by OEMs in the medical industry, and iTomography continues to be on the cutting edge of FBP reconstruction. ​. iTomography offers an optimized CUDA-based version of the iTomoKFBP helical CT image reconstruction software based on the theoretically exact Katsevich algorithm, including a near real-time version that works in parallel with scanning and a multi-GPU off-scanner version. iTomoFDK, CUDA-based circular CT image reconstruction software is available as well. Temporary trial versions are available upon request.. ...
Dimensional analysis is a concept that chemists use to convert units of measurement. Through this concept, chemists are able to convert any unit to another unit that is in the same dimension....
J. K. Adams, V. Boominathan, B. W. Avants, D. G. Vercosa, F. Ye, R. G. Baraniuk, J. T. Robinson, A. Veeraraghavan, Single-Frame 3D Fluorescence Microscopy with Ultraminiature Lensless FlatScope, Science Advances, Vol. 3, No. 12, 8 December 2017.. Abstract: Modern biology increasingly relies on fluorescence microscopy, which is driving demand for smaller, lighter, and cheaper microscopes. However, traditional microscope architectures suffer from a fundamental trade-off: As lenses become smaller, they must either collect less light or image a smaller field of view. To break this fundamental trade-off between device size and performance, we present a new concept for three-dimensional (3D) fluorescence imaging that replaces lenses with an optimized amplitude mask placed a few hundred micrometers above the sensor and an efficient algorithm that can convert a single frame of captured sensor data into high-resolution 3D images. The result is FlatScope: perhaps the worlds tiniest and lightest ...
WHAT IS A 2D/3D/4D ULTRASOUND?. 2D ultrasound works by listening to sound waves in a single plane. The ultrasound is directed out and reflected back again. An ultrasound is the interpretation of these reflected sound waves to form a visualization of the baby.. In 3D ultrasound, the same ultrasound used in traditional 2D is emitted-this time at multiple angles. 3D ultrasound images are created by an algorithmic process commonly know as surface rendering. These multiple reflections are interpreted through sophisticated software, and an accurate 3D image of the baby is instantly created. These amazing rendered images are displayed with incredible surface detail which delineates both body and facial features.. A 4D ultrasound is captured in the same manner as 3D ultrasound-but the rendering occurs many times per second. Instead of looking at a single still image (3D), you are now able to view real-time video of the baby in the womb (4D). In this case, that 4th Dimension is time.. We offer ...
Orbit GT releases 3D Mapping Feature Extraction Standard v18: Orbit GT launches the 3D Mapping Feature Extraction Standard product version 18. Lokeren, Belgium, Nov 15, 2017 --
Conventionally volume measurements can be made by using multiplanar or VOCALTM (Virtual Organ Computer-aided AnaLysis). Recently, a new technique, XI VOCALTM (eXtended Imaging VOCAL) has been described. Combined with the inversion mode, measurements for the liquid-filled structures can also be made. The potential use in clinical diagnosis and prediction of pathologies of volume measurements particularly in the first trimester are yet to be investigated.. 3D ultrasound is found to be superior to 2D parameter in volumetry measurement. However, currently, there are still very few studies done to evaluate the potential use of volumetry measurement in clinical practice, especially of the validity and reproducibility of XI VOCALTM; and the variation of results obtained within different ultrasound machines. Due to the potential use of volumetry measurements in clinical practice, the accuracy in volumetry measurement is very important and the development of new technique need to be fully explored so ...
Virtual Reconstruction serves as an introduction to the principles of three-dimensional visualization techniques as they relate to fossil reconstruction and reverse engineering. It covers data acquisition, processing, virtual reconstruction, visualization, manipulation, reverse engineering, and applications to biomedicine. An adjunct Web site provides access to software, as well as sample data sets and relevant Internet links.Illustrating the concepts, methods, and applications of computer-assisted virtual reconstruction. Virtual Reconstruction demonstrates how readers can transform organisms from physical reality into virtual reality. Specifically, the authors provide the knowledge and tools needed to enable researchers to reconstruct fragmented and distorted fossil specimens in 3-D images so that their function, biomechanics, developmental changes, and evolutionary modifications can be determined. Likewise, the authors demonstrate how the same 3-D techniques can be used to enhance medical ...
Fast, reliable and easy-to-use methods to quantify brain atrophy are of increasing importance in clinical studies on neuro-degenerative diseases. Here, ILAB 4, a new volumetry software that uses a fast semi-automated 3D segmentation of thin-slice T1-weighted 3D MR images based on a modified watershe …
Various studies aim to understand the fundamentals of kicking, primarily the instep kick commonly used by soccer players. Of those studies, most are limited to a 2D analysis using high-speed cameras for position tracking and electromyography to observe muscle activity. The few studies that investigate a 3D model are limited in their position tracking capabilities and focus mainly on joint flexion potentials and foot speed. To the authors knowledge no study of this caliber has been performed on the kinematics and dynamics of place kicking in American football. This thesis uses a 12 camera high-speed motion tracking system to investigate the kicking techniques of three place kickers of different experience levels by observing several kicks from each. Results demonstrate that the quality of a place kick cannot be determined solely on foot speed but direction and location of foot velocity and the force of the kicking leg at impact. Position and orientation of the plant foot proves to be a driving factor in
Principal Investigator:AZUMA Hirohiko, Project Period (FY):1995 - 1996, Research Category:Grant-in-Aid for Scientific Research (C), Section:一般, Research Field:Orthopaedic surgery
3D ultrasound imaging is quickly gaining widespread clinical acceptance as a visualization tool that allows clinicians to obtain unique views not available with traditional 2D ultrasound imaging and an accurate understanding of patient anatomy. The ability to acquire, manipulate and interact with the 3D data in real time is an important feature of 3D ultrasound imaging. Volume rendering is often used to transform the 3D volume into 2D images for visualization. Unlike computed tomography (CT) and magnetic resonance imaging (MRI), volume rendering of 3D ultrasound data creates noisy images in which surfaces cannot be readily discerned due to speckles and low signal-to-noise ratio. The degrading effect of speckles is especially severe when gradient shading is performed to add depth cues to the image. Several researchers have reported that smoothing the pre-rendered volume with a 3D convolution kernel, such as 5x5x5, can significantly improve the image quality, but at the cost of decreased ...
Journal of Spectroscopy is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles on the theory and application of spectroscopy across all disciplines. Articles may contribute to fundamental research, or be highly applied, and must report important experimental results or relate to the development of new methods and instrumentation.
Principal Investigator:ORII Yutaka, Project Period (FY):1992 - 1994, Research Category:Grant-in-Aid for Developmental Scientific Research (B), Research Field:医学一般
OBJECTIVES: To develop and evaluate a fully automatic method to measure diameters of the ascending and descending aorta on non-ECG-gated, non-contrast computed tomography (CT) scans.. MATERIAL AND METHODS: The method combines multi-atlas registration to obtain seed points, aorta centerline extraction, and an optimal surface segmentation approach to extract the aorta surface around the centerline. From the extracted 3D aorta segmentation, the diameter of the ascending and descending aorta was calculated at cross-sectional slices perpendicular to the extracted centerline, at the level of the pulmonary artery bifurcation, and at 1-cm intervals up to 3 cm above and below this level. Agreement with manual annotations was evaluated by dice similarity coefficient (DSC) for segmentation overlap, mean surface distance (MSD), and intra-class correlation (ICC) of diameters on 100 CT scans from a lung cancer screening trial. Repeatability of the diameter measurements was evaluated on 617 baseline-one year ...
To remove an undercut part from three-dimensional data of the inner face, the program includes a surface model creating means to create a surface model based on three-dimensional data of a gypsum model including an abutment tooth, a cutting direction specifying means to specify a direction of a cutting bar, and a surface model creating means to create a surface model for machining by changing the three-dimensional data to have new coordinates by determining a base axis in parallel with the cutting bar in the surface model and plane moving coordinates of the cutting bar, and converting the coordinates of a point which becomes an undercut part, to be equal to the plane moving coordinates of a point having a high height from a specified face rectangular to the base axis at the opposite side of the occlusion face and a long distance from the base axis.
A method includes processing projection data with a first reconstruction algorithm and reconstructing first reconstructed volumetric image data, wherein the first reconstructed volumetric image data has a first 3D noise function. The method further includes processing the same projection data with a second different reconstruction algorithm and reconstructing second reconstructed volumetric image data, wherein the second reconstructed volumetric image data has a second 3D noise function, which is different from the first3Dnoise function. The method further includes visually presenting the first or the second reconstructed volumetric image data in a main viewport. The method further includes visually presenting a sub-portion the other of the first or the second reconstructed volumetric image data in a region of interest overlaid over a sub-portion of the main viewport.
With the introduction of the MyLab™25 Gold, Esaote establishes a new standard in the ultrasound portable systems class. In combination with the high-level of performance in general imaging, MyLab™25Gold offers an advanced package dedicated to obstetrics and gynecology. All the technologies and features mentioned in 2D imaging are the basis on which sophisticated algorithms are able to deliver outstanding 3D/4D volume reconstructions. X4D technology makes volumetric ultrasound scanning easier and more effective than ever and provide raw data for further elaborations and reconstructions. X4D technology provides astonishing volume reconstruction, normally delivered by high-end systems. The easy and comprehensive user interface allows immediate elaboration of the acquired data. Multi-planar and tomographic visualization provide better evaluation of the shape and dimensions of the reconstructed volumes. ...
With the introduction of the MyLab™25 Gold, Esaote establishes a new standard in the ultrasound portable systems class. In combination with the high-level of performance in general imaging, MyLab™25Gold offers an advanced package dedicated to obstetrics and gynecology. All the technologies and features mentioned in 2D imaging are the basis on which sophisticated algorithms are able to deliver outstanding 3D/4D volume reconstructions. X4D technology makes volumetric ultrasound scanning easier and more effective than ever and provide raw data for further elaborations and reconstructions. X4D technology provides astonishing volume reconstruction, normally delivered by high-end systems. The easy and comprehensive user interface allows immediate elaboration of the acquired data. Multi-planar and tomographic visualization provide better evaluation of the shape and dimensions of the reconstructed volumes. ...
Anaglyph printing - think of the red-and-blue 3D glasses used to transform 2D images to 3D images in comics, magazines, books, and newspapers - came into being when the continuous-tone printed anaglyph was invented by French physicist Louis Ducos du Hauron in 1891.. The technique works by combining the left and right images of a stereoscopic image pair into the red and blue color channels of the output anaglyph image. With the red/blue 3D glasses, the left eye sees only the red channel of the anaglyph image, and the right sees only sees the blue. If the anaglyph 3D image has been constructed correctly, the viewer sees a pleasing 3D image on the printed page.. The project team, led by Curtin research engineer Andrew Woods, targeted crosstalk problems which are visible as ghost-like shadows. Their paper published recently in the SPIE journal Optical Engineering details seven recommendations for overcoming crosstalk.. The largest reduction in crosstalk is likely be achieved by using inks which ...
Used with permission IEEE GG&A July Parallel Volume Rendering Using Binary-Swap Image Composition Kwan-Liu Ma ICASE, NASA Langley Research Center James S. Painter Department of Computer Science,
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Latest news and research breakthroughs on Pregnancy Ultrasound Using 3D and 4D Scans. Last updated on Dec 29, 2017 with over 178 News and research items available on the subject. Freely Download - Pregnancy Ultrasound Using 3D and 4D Scans News Widget
Ultrasound scans, also known as sonograms, use the reflection of high-frequency sound waves to create images. The standard 2D obstetric ultrasound shows a flat, black and white picture on a screen.. 2D ultrasounds can be done during any trimester, but are often performed early in gestation to confirm the pregnancy and to help establish the due date. This scan is usually repeated at 18-20 weeks of gestation to check for normal growth and development, and to reveal the sex of the baby if desired.. While trained medical professionals have become adept at recognizing features of the developing fetus in 2D, parents are better able to visualize the baby with the advent of 3D ultrasonography.. A 3D ultrasound creates a different perspective by merging a series of 2D images taken from various angles into a composite to form a 3D picture. Because of this increased resolution and visibility, 3D ultrasounds capture a more detailed and realistic representation of the developing baby.. Because 3D ultrasounds ...
phdthesis{T2013, abstract = {This thesis introduces a collection of new real-time rendering techniques and applications for focus+context visualization of interactive 3D geovirtual environments such as virtual 3D city and landscape models. These environments are generally characterized by a large number of objects and are of high complexity with respect to geometry and textures. For these reasons, their interactive 3D rendering represents a major challenge. Their 3D depiction implies a number of weaknesses such as occlusions, cluttered image contents, and partial screen-space usage. To overcome these limitations and, thus, to facilitate the effective communication of geo-information, principles of focus+context visualization can be used for the design of real-time 3D rendering techniques for 3D geovirtual environments (see Figure). In general, detailed views of a 3D geovirtual environment are combined seamlessly with abstracted views of the context within a single image. To perform the real-time ...
phdthesis{T2013, abstract = {This thesis introduces a collection of new real-time rendering techniques and applications for focus+context visualization of interactive 3D geovirtual environments such as virtual 3D city and landscape models. These environments are generally characterized by a large number of objects and are of high complexity with respect to geometry and textures. For these reasons, their interactive 3D rendering represents a major challenge. Their 3D depiction implies a number of weaknesses such as occlusions, cluttered image contents, and partial screen-space usage. To overcome these limitations and, thus, to facilitate the effective communication of geo-information, principles of focus+context visualization can be used for the design of real-time 3D rendering techniques for 3D geovirtual environments (see Figure). In general, detailed views of a 3D geovirtual environment are combined seamlessly with abstracted views of the context within a single image. To perform the real-time ...
We designed the SWC framework and implemented it in neuTube 1.0 (www.neutracing.com) to improve the efficiency of reconstructing neuron structures accurately. Guided by the framework, the software combines 2D/3D visualization, semi-automated tracing algorithms, and flexible editing options to simplify the task of neuron reconstruction. The SWC framework is not designed to solve the problem of high-throughput neuron tracing, which is different and more challenging. As revealed by the recent DIADEM competition (Liu, 2011), a reliable and generally applicable high-throughput neuron-tracing tool may not be available in the near future. While waiting for the ideal solution, neuroscientists will benefit from better neuron reconstruction tools. Therefore, the goal of the SWC framework is to provide a general architecture, which can adopt state-of-the-art image analysis methods and modern software techniques, for building better interactive neuron reconstruction tools.. Our framework has one limitation, ...
three-dimensional ultrasonography, three-dimensional sonography, three-dimensional ultrasound, 3D ultrasonography, 3D sonography, 3D ultrasound answers are found in the Tabers Medical Dictionary powered by Unbound Medicine. Available for iPhone, iPad, Android, and Web.
TY - JOUR. T1 - Three-dimensional digital ultrasound imaging system for surgical navigation. AU - Sakuma, Ichiro. AU - Tanaka, Yasuyoshi. AU - Takai, Yuichi. AU - Kobayashi, Etsuko. AU - Dohi, Takeyoshi. AU - Schorr, Oliver. AU - Hata, Nobuhiko. AU - Iseki, Hiroshi. AU - Muragaki, Yoshihiro. AU - Hori, Tomokatsu. AU - Takakura, Kintomo. PY - 2001/1/1. Y1 - 2001/1/1. N2 - A new three-dimensional (3D) digital ultrasound imaging system for surgical navigation was developed. The system could obtain 3D data within 12 s and show the data about 40 s. Volume rendering of the 3D data could be possible in a practically short time by introducing the volume rendering graphics accelerator. We applied the system in two clinical cases. The system can also register the obtained image to the other 3D data such as MRI and X-ray CT data by incorporating 3D position tracking system on its ultrasound probe.. AB - A new three-dimensional (3D) digital ultrasound imaging system for surgical navigation was developed. ...
3D computer graphics or three-dimensional computer graphics (in contrast to 2D computer graphics), are graphics that use a three-dimensional representation of geometric data (often Cartesian) that is stored in the computer for the purposes of performing calculations and rendering 2D images. Such images may be stored for viewing later or displayed in real-time. 3D computer graphics rely on many of the same algorithms as 2D computer vector graphics in the wire-frame model and 2D computer raster graphics in the final rendered display. In computer graphics software, 2D applications may use 3D techniques to achieve effects such as lighting, and 3D may use 2D rendering techniques. 3D computer graphics are often referred to as 3D models. Apart from the rendered graphic, the model is contained within the graphical data file. However, there are differences: a 3D model is the mathematical representation of any three-dimensional object. A model is not technically a graphic until it is displayed. A model ...
TY - JOUR. T1 - Diagnostic value of gadolinium-enhanced 3D magnetic resonance angiography in patients with suspected hepatic arterial complications after liver transplantation. AU - Ishigami, Kousei. AU - Stolpen, Alan H.. AU - Hanna Al-Kass, Faraj M.. AU - Zhang, Yan. AU - Rayhill, Stephen C.. AU - Katz, Daniel A.. AU - Abu-Yousef, Monzer. PY - 2005/7/1. Y1 - 2005/7/1. N2 - Purpose: To evaluate the accuracy and clinical role of gadolinium-enhanced 3D magnetic resonance angiography (MRA) in patients with suspected hepatic arterial complications after liver transplantation. Materials and Methods: Thirty-six consecutive MRA studies were performed in 33 liver transplant recipients after transplantation. MRA image quality was assessed subjectively. Thirty-two MRA studies were retrospectively reviewed and correlated with surgery (n = 2), conventional angiography (n = 18), or clinical follow-up (n = 12). MRA findings were also correlated with those of Doppler sonography in 30 of the cases. In 20 ...
Steven Shinn-Forng Peng, Juh-Herng Lin, Wang-Tso Lee, Po Nien Tsao, Jin Chung Shih, Hon-Man Liu, Yiu-Wah Li, Fon-Jou Hsieh, Kou-Inn Yau Tsou. 
HT-2 microscope facilitates three-dimensional fluorescence and optical diffraction tomography of live cells with minimal stress on cells. 27 November 2018, Daejeon, South Korea: The HT-2 from Tomocube is the worlds first microscope to combine both holotomography and 3D fluorescence imaging into one unit. Capable of simultaneously capturing high resolution 3D optical diffraction tomography and 3D fluorescence images, the new microscope enables long-term tracking of specific targets in live cells while minimising stress. The capability to easily deliver holotomography and fluorescence correlative analysis in 2D, 3D and 4D will enable researchers and clinicians to open new frontiers in bioscience and better understand, diagnose, and treat disease.. Research and diagnosis in the life sciences depends on the information that can be found using cellular analysis, says Aubrey Lambert, Tomocubes Chief Marketing Officer. Current microscopy techniques limit the quantity and quality of information ...
VAL, Aurore et al. 3D techniques and fossil identification: an elephant shrew hemi-mandible from the Malapa site. S. Afr. j. sci. [online]. 2011, vol.107, n.11-12, pp.01-05. ISSN 1996-7489.. Conventional methods for extracting fossilised bones from calcified clastic sediments, using air drills or chemical preparations, can damage specimens to the point of rendering them unidentifiable. As an alternative, we tested an in silico approach that extended preparation and identification possibilities beyond those realisable using physical methods, ultimately proving to be crucial in identifying a fragile fossil. Image data from a matrix-encased hemi-mandible of a micromammal that was collected from the Plio-Pleistocene site of Malapa, Cradle of Humankind, South Africa, were acquired using microtomography. From the resultant images, a 3D rendering of the fossil was digitally segmented. Diagnostic morphologies were evaluated on the rendering for comparison with extant comparative specimens, positively ...
TY - JOUR. T1 - 3-dimensional magnetic resonance spectroscopic imaging at 3 Tesla for early response assessment of glioblastoma patients during external beam radiation therapy. AU - Muruganandham, Manickam. AU - Clerkin, Patrick P.. AU - Smith, Brian J.. AU - Anderson, Carryn M.. AU - Morris, Ann. AU - Capizzano, Aristides A.. AU - Magnotta, Vincent. AU - McGuire, Sarah M.. AU - Smith, Mark C.. AU - Bayouth, John E.. AU - Buatti, John M.. PY - 2014/9/1. Y1 - 2014/9/1. N2 - Purpose To evaluate the utility of 3-dimensional magnetic resonance (3D-MR) proton spectroscopic imaging for treatment planning and its implications for early response assessment in glioblastoma multiforme. Methods and Materials Eighteen patients with newly diagnosed, histologically confirmed glioblastoma had 3D-MR proton spectroscopic imaging (MRSI) along with T2 and T1 gadolinium-enhanced MR images at simulation and at boost treatment planning after 17 to 20 fractions of radiation therapy. All patients received standard ...
Purpose.: To investigate the optical intensities of all retinal layers on three-dimensional (3D) spectral-domain optical coherence tomography (SD-OCT) in normal subjects using an automatic measurement. Methods.: Forty normal subjects underwent Topcon 3D OCT-1000 macula-centered scan. The raw data were automatically segmented into 10 layers using the 3D graph search approach. Then the mean and standard deviation of intensities of each layer were calculated. The image quality index was given by the OCT software. Correlation analysis was performed between the optical intensities in each layer and image quality and subjects age. Results.: The correlation of optical intensities was strong from ganglion cell layer (GCL) to outer nuclear layer (ONL) with r , 0.934; moderate among retinal nerve fiber layer (RNFL), photoreceptor, retinal pigment epithelium (RPE), and choroid (0.410 , r , 0.800); and low in the vitreous (0.251 , r , 0.541). The optical intensities were also correlated with the image ...
With the development of precise three-dimensional motion measurement systems and powerful computers for three-dimensional graphical visualization, it is possible to record and fully reconstruct human jaw motion. In this paper, we describe a visualization system for displaying three-dimensional jaw movements in speech. The system is designed to take as input jaw motion data obtained from one or multi-dimensional recording systems. In the present application, kinematic records of jaw motion were recorded using an optoelectronic measurement system (Optotrak). The corresponding speech signal was recorded using an analog input channel. The three orientation angles and three positions that describe the motion of the jaw as a rigid skeletal structure were derived from the empirical measurements. These six kinematic variables, which in mechanical terms account fully for jaw motion kinematics, act as inputs that drive a real-time three-dimensional animation of a skeletal jaw and upper skull. The ...
We consider diffusion in arbitrary spatial dimension d with the addition of a resetting process wherein the diffusive particle stochastically resets to a fixed position at a constant rate $r$. We compute the non-equilibrium stationary state which exhibits non-Gaussian behaviour. We then consider the presence of an absorbing target centred at the origin and compute the survival probability and mean time to absorption of the diffusive particle by the target. The mean absorption time is finite and has a minimum value at an optimal resetting rate $r^*$ which depends on dimension. Finally we consider the problem of a finite density of diffusive particles, each resetting to its own initial position. While the typical survival probability of the target at the origin decays exponentially with time regardless of spatial dimension, the average survival probability decays asymptotically as $\exp -A (\log t)^d$ where $A$ is a constant. We explain these findings using an interpretation as a renewal process ...
1. Introduction to Biomechanics 2. Methods of kinematic analysis 3. Newtons laws of motion. 4. Neuromuscular control of motion. Central and Peripheral nervous system 5. Muscle strength assessment 6. Muscle architecture 7. 3-D Analysis of sport technique - Track and Field - Running - Hurdles 8. 3-D Analysis of sport technique - Track and Field - Jumping 9. 3-D Analysis of sport technique - Gymnastics - Tennis - Swimming 10.3-D Analysis of sport technique - Soccer - Basketball 11.3-D Analysis of sport technique - Handball - ...
ResearchMoz presents professional and in-depth study of "Global Surgical Navigation Systems Sales Market Report 2017".In this report, the global Surgical Navigation Systems market is valued at USD XX million in 2016 and is expected to reach USD XX million by the end of 2022, growing at a CAGR of XX% between 2016 and 2022.Geographically, this report split global into several key Regions, with sales (K Units), revenue (Million USD), market share and growth rate of Surgical Navigation Systems for these...
Augmented reality (AR) surgical navigation systems based on image overlay have been used in minimally invasive surgery (MIS). However, conventional systems still suffer from a limited viewing zone, a shortage of intuitive three-dimensional (3D) image guidance and cant be moved freely. To fuse the 3D overlay image with the patient in situ, it is essential to track the overlay device while it is moving. A direct line-of-sight should be maintained between the optical markers and the tracker camera. We propose a moving-tolerant AR surgical navigation system using autostereoscopic image overlay, which can avoid the use of the optical tracking system during the intraoperative period. The system captures binocular image sequences of environmental change in the operation room to locate the overlay device, rather than tracking the overlay device directly. Therefore, it is no longer required to maintain a direct line-of-sight between the tracker and the tracked devices. The movable range of the system is ...
Objective: A qualitative study was conducted to explore dimensions underlying psychosocial barriers to prevention of early childhood caries among recent immigrants in Edmonton, Canada. Method: Eleven focus groups were completed with 65 mothers of 3-5 year old children from African and South Asian communities. Participants had lived in Canada for five years or less. Four debriefing interviews were conducted with the community workers who facilitated the focus groups in participants first languages. A dimensional analysis was used for data analysis. Result: Type, level, nature, awareness, controllability, influence, objectiveness, and interdependence were the most salient dimensions underlying barriers to home-based and professional-based preventions. Type refers to a barrier itself while level refers to where the barrier was located (individual, family, community, or systemic level). Nature expresses the inherent character of identified barriers which were related to knowledge, skills, ...
N. Le Roux, X. Faure, S. Soares, Christian Inard. Dimensional analysis of ventilation systems to study isothermal flows in steady and transient conditions. CLIMA 2010 World Conference, May 2010, Antalya, Turkey. ⟨hal-00537286⟩ ...
The following thesis presents a protocol for the three-dimensional visualization of the cranial nerves V-VIII within the basal cisterns, being optimized with regard to data acquisition and postprocessing. Based on high resolution MRI datasets and using the volume rendering technique, 10 standardized views of the aforementioned cranial nerves were developed. Thus, the complete and time effective intracisternal depiction was intended to be made possible, focussing on pathophysiological important areas of the nerves. The protocol showed its suitability concerning image quality and diagnostic value in evaluation of patients with neurovascular conflicts or other neural compression syndromes in the cerebello-pontine angle. Problems mainly occurred as a result of pulsation and motion artefacts in the MR dataset and narrow cisterns in the level of the virtual camera position. In most cases they could be solved by slight variations of the postprocessing parameters. To guaranty the correct identification ...
The following thesis presents a protocol for the three-dimensional visualization of the cranial nerves V-VIII within the basal cisterns, being optimized with regard to data acquisition and postprocessing. Based on high resolution MRI datasets and using the volume rendering technique, 10 standardized views of the aforementioned cranial nerves were developed. Thus, the complete and time effective intracisternal depiction was intended to be made possible, focussing on pathophysiological important areas of the nerves. The protocol showed its suitability concerning image quality and diagnostic value in evaluation of patients with neurovascular conflicts or other neural compression syndromes in the cerebello-pontine angle. Problems mainly occurred as a result of pulsation and motion artefacts in the MR dataset and narrow cisterns in the level of the virtual camera position. In most cases they could be solved by slight variations of the postprocessing parameters. To guaranty the correct identification ...
We describe a new method of 3D image reconstruction of neutron sources that emit correlated gammas (e.g. Cf- 252, Am-Be). This category includes a vast majority of neutron sources important in nuclear threat search, safeguards and non-proliferation. Rather than requiring multiple views of the source this technique relies on the sources intrinsic property of coincidence gamma and neutron emission. As a result only a single-view measurement of the source is required to perform the 3D reconstruction. In principle, any scatter camera sensitive to gammas and neutrons with adequate timing and interaction location resolution can perform this reconstruction. Using a neutron double scatter technique, we can calculate a conical surface of possible source locations. By including the time to a correlated gamma we further constrain the source location in three-dimensions by solving for the source-to-detector distance along the surface of said cone. As a proof of concept we applied these reconstruction ...
The scope of this report is broad and covers different types of surgical navigation systems applications in different kinds of treatment. The market is broken down by types of surgical navigation systems, applications, end user and regional markets. Revenue forecasts from 2016 to 2021 are given for each major type of surgical navigation system, application, end user and regional market, and the estimated values are derived from the manufacturers total revenues.. The report also includes a discussion of the major players across each of the regional surgical navigation systems markets; it explains the major market drivers of the global surgical navigation systems industry, current trends within the industry, major applications and the regional dynamics of the global surgical navigation systems market.. The report concludes with a special focus on the vendor landscape, which includes detailed profiles of the major vendors in the global surgical navigation systems industry.. ...
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This gridded product visualizes 1960 - 2014 water body chlorophyll-a (mg/m^3) in the North Sea domain, spring season (March - May). It is produced as a Diva 4D analysis, version 4.6.11: a reference field of all seasonal data between 1960-2014 was used; results were logit transformed to avoid negative/underestimated values in the interpolated results; error threshold masks L1 (0.3) and L2 (0.5) are included as well as the unmasked field. Every step of the time dimension corresponds to a 10-year moving average for the season: spring season (March - May). The depth dimension allows visualizing the gridded field at various depths ...
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Background-Although surgery is indicated in patients with mitral regurgitation (MR) when left ventricular (LV) end-systolic (ES) dimension (D) is ,40mm, LV ejection fraction (EF) may decrease post-mitral valve surgery. We hypothesize that significant LV remodeling pre-surgery is not reflected by standard echocardiographic parameters measured at the base of the heart. Methods and Results-94 patients (54±11 years, 38% female) with degenerative isolated MR underwent cine-magnetic resonance imaging (MRI) with tissue tagging and three-dimensional analysis. In 51 control subjects (44±14 years, 53% female), the relation between LVES volume (V) and LVESD was quadratic, while in 94 MR patients this relation was cubic, indicating greater increase in LVESV per LVESD amongst MR patients. Moreover, MRI LVESV from summated serial short axis slices was significantly greater than LVESV using the Bullet formula in MR patients, attributed to a more spherical remodeling distal to the tips of the papillary ...
To train, evaluate, and validate the application of a deep learning framework in three-dimensional ultrasound (3D US) for the automatic segmentation of ventricular volume in preterm infants with post haemorrhagic ventricular dilatation (PHVD). We trained a 2D convolutional neural network (CNN) for automatic segmentation ventricular volume from 3D US of preterm infants with PHVD. The method was validated with the Dice similarity coefficient (DSC) and the intra-class coefficient (ICC) compared to manual segmentation. The mean birth weight of the included patients was 1233.1 g (SD 309.4) and mean gestational age was 28.1 weeks (SD 1.6). A total of 152 serial 3D US from 10 preterm infants with PHVD were analysed. 230 ventricles were manually segmented. Of these, 108 were used for training a 2D CNN and 122 for validating the methodology for automatic segmentation. The global agreement for manual versus automated measures in the validation data (n=122) was excellent with an ICC of 0.944 (0.874-0.971). ...
With the current widespread use of 3D facial surface imaging in clinical and research environments, there is a growing demand for high quality craniofacial norms based on 3D imaging technology. The principal goal of the 3D Facial Norms (3DFN) project was to create an interactive, web-based repository of 3D facial images and measurements. Unlike other repositories, users can gain access to both summary-level statistics as well as individual-level data, including 3D facial landmark coordinates, 3D-derived anthropometric measurements, 3D facial surface images and genotypes from every individual in the dataset. The 3DFN database currently consists of 2454 male and female participants ranging in age from 3-40 years. These subjects were recruited at four US sites and screened for a history of craniofacial conditions. The goal of this paper is to introduce readers to the 3DFN repository by providing a general overview of the project, explaining the rationale behind the creation of the database, and ...
The observations presented in this paper collectively indicate that high-frequency three-dimensional power Doppler ultrasound can be used to assess functional neoangiogenesis in GEM prostate cancer models. The power Doppler signal is proportional to the concentration of blood cells flowing at velocities high enough to be detected by the Doppler system (e.g., , 3 mm/s in this study). The CPD is therefore considered an estimate of the fraction of the tissue volume that is occupied by moving blood ( 23). Tumor CPD data reflect flow in intermediate-sized (e.g., ,100 μm diameter) arterioles and venules and arteriovenous shunts. Vessels imaged by power Doppler are functional in the sense that they support active blood flow. This point is an important aspect of interpreting Doppler images of tumors because as few as 20% of the vessels in a tumor may be perfused at any given instant, and tumor perfusion varies both spatially and temporally ( 19). In addition, unlike many other imaging techniques, ...
Global Surgical Navigation Systems Market 2019 Report provides main statistics connected to the overall market and price forecast over a period, from 2019 to 2028. This research report studies surgical navigation systems market definition, types, applications latest trends to identify the revenues and the progress...
A fully automatic method for rapidly and unambiguously interpreting fringe patterns, including those having branched fringes, is provided. The information from the fringe patterns processed by the method of the invention can be used in testing, surface characterization and inspection applications. Further processing of the information from the two-dimensional fringe patterns yields information from which the three-dimensional surface can be quantitatively reconstructed for further use such as for display, as in microscopy, or as input for computer-aided design and computer-aided manufacture. Apparatus for conducting the method of the invention is also provided.
3D Rendering & Animation Projects for $100 - $500. I need a short animated two-part clip, that could be used for a longer presentational video to serve as visual aid in explaining a scientific project proposal. I would like to show two nanoparticles...
Toda la información sobre las últimas publicaciones científicas de la Clínica Universidad de Navarra. Three-dimensional volume off-line analysis as compared to real-time ultrasound for assessing adnexal masses
This study evaluated the potential impact of different visualisation methods of cone-beam computed tomography (CBCT) on the accuracy of linear measurements of calcified structures, and assessed their interchangeability. High resolution (0.125 mm voxel) CBCT scans were obtained from eight cadaveric heads. The distance between the alveolar bone ridge and the incisal edge was determined for all mandibular incisors and canines, both anatomically and with measurements based on the following five CBCT visualisation methods: isosurface, direct volume rendering, multiplanar reformatting (MPR), maximum intensity projection of the volume of interest (VOIMIP), and average intensity projection of the volume of interest (VOIAvIP). All radiological methods were tested for repeatability and compared with anatomical results for accuracy, and limits of agreement were established. Interchangeability was evaluated by reviewing disparities between the methods and disclosing deterministic differences. Fine intra- ...
Hi, guys I am doing some boxes design. Sharing some 3D blank sample and 3D color sample here. The design is just a practice, not good, I am making progress. I also want to learn how to do structural 3D design, such as draw a 2D car, or draw a round vase, and then view the 3D renderings, any good ...
The average salary for an Industrial Designer with 3D Rendering skills in New York, New York is $58,146. Visit PayScale to research industrial designer salaries by city, experience, skill, employer and more.
Enhancing resolution is a permanent goal in magnetic resonance (MR) imaging, in order to keep improving diagnostic capability and registration methods. Super-resolution (SR) techniques are applied at the postprocessing stage, and their use and development have progressively increased during the last years. In particular, example-based methods have been mostly proposed in recent state-of-the-art works. In this paper, a combination of a deep-learning SR system and a random shifting technique to improve the quality of MR images is proposed, implemented and tested. The model was compared to four competitors: cubic spline interpolation, non-local means upsampling, low-rank total variation and a three-dimensional convolutional neural network trained with patches of HR brain images (SRCNN3D). The newly proposed method showed better results in Peak Signal-to-Noise Ratio, Structural Similarity index, and Bhattacharyya coefficient. Computation times were at the same level as those of these up-to-date ...
Publikations-Datenbank der Fraunhofer Wissenschaftler und Institute: Aufsätze, Studien, Forschungsberichte, Konferenzbeiträge, Tagungsbände, Patente und Gebrauchsmuster
A 72 year old man attended for follow up computed tomography (CT) of a chronic type A aortic dissection, three years on from his original presentation. The contrast enhanced multislice CT was acquired using retrospective ECG gating. Subsequent reconstruction of the CT images was from a diastolic reconstruction window centred at 75% of the RR interval. This mode of acquisition provided images of the thoracic aorta free of motion artefact. The chronic dissection flap could clearly be seen arising in the proximal, aneurysmal ascending aorta (panel A, axial CT section), extending to the head and neck vessels (panel B, sagittal CT section), and progressing distally to the descending aorta (panel C, three dimensional reconstruction in sagittal section). Advanced post-processing using volume rendering techniques demonstrated the dissection (panel C) and the aneurysm (panel D) in three dimension.. Aortic motion artefact is the most common cause of false positive detection of dissection of the ...
The segmentation is performed using automated techniques and semi-automated techniques. Automatic segmentation techniques include an automatic gain artifact suppression technique based on expectation-maximization in association with a cortical volume isolation technique based on image morphology and active contours. Below is a slice of an MRI, with the brain, ventricles, and tumor segmented. We use surface rendering techniques to display the segmented MRI structures. This procedure consists of first extracting bounding surfaces from the segmented MRI volume using the marching cubes algorithm. This algorithm generates a set of connected triangles to represent the 3D surface for each segmented structure. These surfaces are then displayed by selecting a virtual viewing camera location and orientation in the MRI coordinate frame and using standard computer graphics techniques to project the surface onto the viewing camera. This rendering process removes hidden portions of the surface, shades the ...
A new three-dimensional (3D) MR imaging pulse sequence can produce over 100 high-resolution, high-contrast images in as little as 6 minutes of imaging time. Without additional imaging time, this same image data can be post-processed to yield high-resolution, high-contrast images in any arbitrary orientation. Thus, this new pulse sequence technique provides detailed yet comprehensive coverage. The method of this invention relates to a preparation-acquisition-recovery sequence cycle. The first step is magnetization preparation (MP) period. The MP period can emply a series of RF pulses, gradient field pulses, and/or time delays to encode the desired contrast properties in the form of longitudinal magnetization. A data acquisition period includes at least two repetitions of a gradient echo sequence to acquire data for a fraction of k-space. A magnetization recovery period is provided which allows T1 and T2 relaxation before the start of the next sequence cycle. The MP, data acquisition and magnetization
This invention is a system for use during a medical or surgical procedure on a body. The system generates an image representing the position of one or more body elements (10, 20, 30) using scans generated by a scanner prior or during the procedure. The image data set has reference points (10A)-(30C) for each of the body elements, the reference points of a body element having a fixed spatial relation to the body element. The system includes an apparatus (108) for identifying the relative position of each of the reference points of each of the body elements to be displayed. The system also includes a processor (104) for modifying the image data set according to the identified relative position of each of the reference points during the procedure. Also disclosed are devices for use with a surgical navigation system having a sensor array (110, 112) in communication with the device to identify its position.
Kyle Tallakson, Colorado State University Mechanical Engineering major, is building a 3D printed spinal fusion in the Idea2Product lab for his Advance Additive Manufacturing Engineering, MECH 502. The original project was to create a spinal fusion model. We took a CT scan (Computerized Tomography scan) and made it into a 3D model, Tallakson said. Tallakson is working on the project with a team. I got the CT scan from the hospital after an accident I had a couple years ago, Tallakson said. Tallakson was hit by a car going down Elizabeth Street in Fort Collins, CO and split his kidney in half. They threw me in a CT scan just to see if I was bleeding internally or if I had any other broken bones. Luckily Tallakson had no other broken bones from the accident. Tallakson was able to request the CT Scan for free from the hospital and then used 3D Slicer, an open source software platform for medical image informatics, image processing, and three-dimensional visualization, to separate each vertebra ...
We show cell images from two different approaches of computational 3-D fluorescence imaging integrated on a single wide-field fluorescence microscope system and discuss advantages and disadvantages of the two techniques under investigation.. © 2010 The Optical Society. PDF Article ...
The purpose of this study was to compare two non-contrast 2D techniques with the current contrast-enhanced MRI standard 3D technique for the routine assessment of thoracic aortic pathologies. One hund
A microangiography method and system based on full-space modulation spectrum splitting and angle compounding is disclosed. Label-free three-dimensional optical coherence tomography angiography is realized by combining the three-dimensional space resolution capability of an optical coherence tomography and the motion recognition capability of a dynamic scattering technology. Probe light of different incident angles is encoded with a transverse scanning modulation spectrum in a spatial frequency domain, incident angle-resolved sub-angiograms which are ...
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Imaging and localizing point sources with high accuracy in a 3D volume is an important but challenging task. For example, super-resolution 3D single molecule localization is an area of intense interest in biology (cell imaging, folding, membrane behavior, etc.), in chemistry (spectral diffusion, molecular distortions, etc.), and in physics (structures of materials, quantum optics, etc.). We consider here the high-resolution imaging problem of 3D point source image recovery from 2D data using methods based on point spread function (PSF) design. The methods involve a new technique, recently patented by S. Prasad, for applying rotating point spread functions with a single lobe to obtain depth from defocus. The amount of rotation of the PSF encodes the depth position of the point source. The distribution of point sources is discretized on a cubical lattice where the indexes of nonzero entries represent the 3D locations of point sources. The values of these entries are the point source fluxes. ...