• radio-frequency
  • It is a gradient echo sequence which combines a low-flip angle radio-frequency excitation of the nuclear magnetic resonance signal (recorded as a spatially encoded gradient echo) with a rapid repetition time. (wikipedia.org)
  • In terms of MRI, signals with different spatial encodings that are required for the reconstruction of a full image need to be acquired by generating multiple signals - usually in a repetitive way using multiple radio-frequency excitations. (wikipedia.org)
  • The generic FLASH technique emerges as a gradient echo sequence which combines a low-flip angle radio-frequency excitation of the NMR signal (recorded as a spatially encoded gradient echo) with a rapid repetition of the basic sequence. (wikipedia.org)
  • Only the combination of (i) a low-flip angle excitation which leaves unused longitudinal magnetization for an immediate next excitation with (ii) the acquisition of a gradient echo which does not need a further radio-frequency pulse that would affect the residual longitudinal magnetization, allows for the rapid repetition of the basic sequence interval and the resulting speed of the entire image acquisition. (wikipedia.org)
  • FLASH reduced the typical sequence interval to what is minimally required for imaging: a slice-selective radio-frequency pulse and gradient, a phase-encoding gradient, and a (reversed) frequency-encoding gradient generating the echo for data acquisition. (wikipedia.org)
  • Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. (wikipedia.org)
  • Sound waves vibrated a diaphragm which slightly altered the shape of the resonator, which modulated the reflected radio frequency. (wikipedia.org)
  • A radio-frequency identification system uses tags, or labels attached to the objects to be identified. (wikipedia.org)
  • Wireless identity theft, also known as contactless identity theft or RFID identity theft, is a form of identity theft described as "the act of compromising an individual's personal identifying information using wireless (radio frequency) mechanics. (wikipedia.org)
  • Each of these cards carry a Radio frequency identification chip which responds to certain radio frequencies. (wikipedia.org)
  • data
  • Characterizing brain connectivity between neural signals is key to understanding brain function.In our method, fully data-driven MEMD, together with Hilbert transform, is first employed to provide time-frequency power spectra for neural data.Furthermore, a statistical randomization procedure is designed to cancel out the effect of the added noise. (nih.gov)
  • In our method, fully data-driven MEMD, together with Hilbert transform, is first employed to provide time-frequency power spectra for neural data. (nih.gov)
  • Local field potentials collected from visual cortex of macaque monkey while performing a generalized flash suppression task are then used to demonstrate the usefulness of our NAIC method to provide highresolution time-frequency coherence measure for connectivity analysis of neural data. (nih.gov)
  • 3. A fully automated method according to claim 1 wherein the processable data are generated by pre-processing raw data generated by the medical imaging system. (google.co.uk)
  • 4. A fully automated method according to claim 3 further comprising normalizing the processable data prior to computationally processing the processable data. (google.co.uk)
  • 5. A fully automated method according to claim 1 wherein the plurality of stored tissue classifier elements are developed using known outcome data by a process selected from the group consisting of logistic regression, decision trees, non-parametric regression, Fisher discriminant analysis, Bayesian network modeling, and a fuzzy logic system. (google.co.uk)
  • PURPOSE: To present and validate a new method that formalizes a direct link between k-space and wavelet domains to apply separate undersampling and reconstruction for high- and low-spatial-frequency k-space data. (biomedsearch.com)
  • The device includes a computer configured to process the ultrasound data and position data to thereby determine a location of the point. (google.es)
  • a computer configured to process the ultrasound data and position data to thereby determine the location of the point associated with the surface of the animal organ with respect to an on site reference coordinate system. (google.es)
  • 10. The percutaneous-point determination device of claim 1 , wherein the computer is configured to cross-correlate the ultrasound data with reference ultrasound data to thereby determine the distance from the ultrasound device to the point. (google.es)
  • In a mixed-signal system (analog and digital), a reconstruction filter is used to construct a smooth analog signal from a digital input, as in the case of a digital to analog converter (DAC) or other sampled data output device. (wikipedia.org)
  • Medical image computing (MIC) is an interdisciplinary field at the intersection of computer science, data science, electrical engineering, physics, mathematics and medicine. (wikipedia.org)
  • The compact digital signal processor (DSP)-based demodulator hardware uses a unique personal computer test interface for downloading test data files. (wiretrip.net)
  • The present document relates to time-alignment of encoded data of an audio encoder with associated metadata, such as spectral band replication (SBR) metadata. (patents.com)
  • When combining digital data sets in the time domain into a combined digital data set a subset of samples of each digital data set is adjusted to enable. (patents.com)
  • Then an analog-to-digital converter 'translates' the assisted signal into the computer language, making the signal digital and then it is further transmitted to the data processing, storage and display unit. (innovations-report.com)
  • Mapping and geographic information systems (GIS) - Most mapping grade GNSS receivers use the carrier wave data from only the L1 frequency, but have a precise crystal oscillator which reduces errors related to receiver clock jitter. (wikipedia.org)
  • By storing the carrier phase measurements and differentially post-processing the data, positioning errors on the order of 10 centimeters are possible with these receivers. (wikipedia.org)
  • orders of magnit
  • While the amount of noise derived from this particular simulation is empirical, it indicates that the amount of noise should be four orders of magnitude less than the signal. (nih.gov)
  • The technique is revolutionary in shortening MRI measuring times by up to two orders of magnitude. (wikipedia.org)
  • repetition
  • In fact, all of the current methods for stretching sound are based on some form of windowing operation, usually with overlapping envelopes whose shape and frequency of repetition are controllable. (sfu.ca)
  • Depending on the desired contrast, the generic FLASH technique provides spoiled versions that destroy transverse coherences and yield T1 contrast as well as refocused versions (constant phase per repetition) and fully balanced versions (zero phase per repetition) that incorporate transverse coherences into the steady-state signal and offer T1/T2 contrast. (wikipedia.org)
  • The repetition time is usually much shorter than the typical T1 relaxation time of the protons in biologic tissue. (wikipedia.org)
  • In either case, repetition times are as short as 2 to 10 milliseconds, so that the use of 64 to 256 repetitions results in image acquisition times of about 0.1 to 2.5 seconds for a two-dimensional image. (wikipedia.org)
  • wherein
  • 6. A fully automated method according to claim 5 wherein at least one of the plurality of stored tissue classifier elements is determined by a process selected from the group consisting of post-operative histological examination, direct tissue inspection, and labeling by one or more experts. (google.co.uk)
  • 5. The percutaneous-point determination device of claim 1 , wherein the emitted ultrasound beam has a variable frequency to provide a predetermined axial resolution along the ultrasound beam axis. (google.es)
  • 6. The percutaneous-point determination device of claim 5 , wherein the frequency of the emitted ultrasound beam is variable between about 1 MHZ and about 15 MHZ. (google.es)
  • analysis
  • Conversely, to narrow the uncertainty in frequency, a longer "window" of time is required, both in analysis and synthesis. (sfu.ca)
  • We repeated the same analysis procedure for 50 times to obtain error bars at each noise level. (nih.gov)
  • This process exists in opposition to phonetics and word analysis, as a different method of recognizing and verbalizing visual language (i.e. reading). (wikipedia.org)
  • The Video Coding & Analytics department is researching actively the efficient encoding, transport, processing and analysis of video signals as well as machine learning. (wikipedia.org)
  • These devices substitute the functions performed by the ear drum and stapes while simulating the frequency analysis performed in the cochlea. (wikipedia.org)
  • The FAST radiotelescope in China also joined forces in October 2016 with the Breakthrough Initiatives to launch a coordinated search, including the rapid sharing of promising new signals for additional observation and analysis. (wikipedia.org)
  • Analysis is the process of breaking a complex topic or substance into smaller parts in order to gain a better understanding of it. (wikipedia.org)
  • The field of chemistry uses analysis in at least three ways: to identify the components of a particular chemical compound (qualitative analysis), to identify the proportions of components in a mixture (quantitative analysis), and to break down chemical processes and examine chemical reactions between elements of matter. (wikipedia.org)
  • Chemists can use isotope analysis to assist analysts with issues in anthropology, archeology, food chemistry, forensics, geology, and a host of other questions of physical science. (wikipedia.org)
  • Signals intelligence applies cryptanalysis and frequency analysis to break codes and ciphers. (wikipedia.org)
  • Modern mathematical analysis is the study of infinite processes. (wikipedia.org)
  • analog
  • The sampling theorem describes why the input of an ADC requires a low-pass analog electronic filter, called the anti-aliasing filter: the sampled input signal must be bandlimited to prevent aliasing (here meaning waves of higher frequency being recorded as a lower frequency). (wikipedia.org)
  • Doppler
  • By exploiting the Doppler effect, which causes frequency shifts in echoes reflected from moving objects, modern RADARs can tell not only where an object is but what direction it is moving in and how quickly. (encyclopedia.com)
  • Its action is based on the Doppler effect - the fact that the frequency of oscillation or the radiation wave length is changing when re-echoed from a moving object. (innovations-report.com)
  • exposure time
  • With the requested exposure time of 100 ksec we expect to detect several hundred late-type stars, yielding a substantial fraction of the entire cluster population. (harvard.edu)
  • If dark-frame subtraction is not done, or if the exposure time is long enough that the hot pixel charge exceeds the linear charge capacity, the noise will be more than just shot noise, and hot pixels appear as salt-and-pepper noise. (wikipedia.org)
  • coherence
  • In his work, a fused formant based sound can disintegrate into a rhythmic pattern or granular texture, and then revert to the original sound, even maintaining phase coherence in the process. (sfu.ca)
  • To examine the effect of noise on coherence estimation, we systematically varied the noise by changing its variance relative to the signal and estimated the coherence between channel X and Z in the above simulation. (nih.gov)
  • real time
  • Utterances spoken or sung by a first person can be received, in real time, from a mobile communication device. (patents.com)
  • High definition spectrograms are used in the development of RF and microwave systems Spectrograms are now used to display scattering parameters measured with vector network analyzers The US Geological Survey now provides real-time spectrogram displays from seismic stations From the formula above, it appears that a spectrogram contains no information about the exact, or even approximate, phase of the signal that it represents. (wikipedia.org)
  • accurately
  • For this reason, oversampling may be used to ensure that frequencies of interest are accurately reproduced without excess energy being emitted out of band. (wikipedia.org)
  • sensors
  • It can consist of one or more sensors, processing components, display devices (which are sometimes in themselves called "monitors"), as well as communication links for displaying or recording the results elsewhere through a monitoring network. (wikipedia.org)
  • The translating component of medical monitors is responsible for converting the signals from the sensors to a format that can be shown on the display device or transferred to an external display or recording device. (wikipedia.org)
  • system
  • A visual prosthesis system consists of an external (or implantable) imaging system which acquires and processes the video. (wikipedia.org)
  • magnetic
  • The physical basis of MRI is the spatial encoding of the nuclear magnetic resonance (NMR) signal obtainable from water protons (i.e. hydrogen nuclei) in biologic tissue. (wikipedia.org)
  • A heat assisted magnetic recording (HAMR) write apparatus has a media-facing surface (MFS) and includes a pole, coil(s) and a waveguide. (patents.com)
  • A magnetic field-assisted magnetic recording (MAMR) head is provided, which includes a recording main pole, a seed layer, and a spin torque oscillator (STO). (patents.com)
  • parameters
  • Moreover, it is the time domain parameters involved in each model that control the bandwidth of the result, usually intended to shape the formant regions of the simulated vowels. (sfu.ca)
  • In medicine, monitoring is the observation of a disease, condition or one or several medical parameters over time. (wikipedia.org)
  • shorter
  • The number of transactions per minute can be increased, and more transactions can be processed in a shorter time, therefore making for arguably shorter lines at the cashier. (wikipedia.org)
  • spectral
  • A class of contemporary methods of sound synthesis and signal processing known as time-frequency models that emerged over the last two decades has their basis at this quantum level such that changes in a signal's time domain result in spectral alterations and vice versa. (sfu.ca)
  • As the temporal shape of a sound becomes elongated, whether by a small percentage or a very large amount, one's attention shifts towards the spectral components of the sound, either discrete frequency components, harmonics or inharmonics, or resonant regions and broadband textures. (sfu.ca)
  • occur
  • Longer duration of prospective follow-up will be required to determine at what time point improvements in the other frequency bands occur. (biomedsearch.com)
  • One of the dangers is a risk of embolism by a gas bubble, which may occur in the process of blood circulation in the pump oxygenator. (innovations-report.com)
  • Imaging
  • To better exploit wavelet-domain sparsity, compressed sensing can be used for high-spatial-frequency regions, whereas parallel imaging can be used for low-spatial-frequency regions. (biomedsearch.com)
  • RARE was slower, and echo-planar imaging (EPI) - for technical reasons - took even more time. (wikipedia.org)
  • The introduction of FLASH MRI sequences in diagnostic imaging for the first time allowed for a drastic shortening of the measuring times without a substantial loss in image quality. (wikipedia.org)
  • Diagnostic imaging is a process of imaging human body with the help of various imaging services. (yumpu.com)
  • method
  • A computer-implemented method of the invention includes: determining, by a. (patents.com)
  • An automotive speech input optimization method includes using a microphone to convert audible speech into an audio signal. (patents.com)
  • methods
  • THEORY AND METHODS: High- and low-spatial-frequency regions are defined in k-space based on the separation of wavelet subbands, and the conventional compressed sensing problem is transformed into one of localized k-space estimation. (biomedsearch.com)
  • Systems and methods are presented for efficient cross-fading (or other multiple clip processing) of compressed domain information streams on a user or client. (patents.com)
  • These two methods actually form two different time-frequency representations, but are equivalent under some conditions. (wikipedia.org)
  • Furthermore
  • Furthermore, a better understanding of the processes involved in word recognition may enable more specific treatments for individuals with reading disabilities. (wikipedia.org)
  • image
  • A subtlety in image processing is that (linear) signal processing assumes linear luminance - that doubling a pixel value doubles the luminance of the output. (wikipedia.org)
  • Segmentation is the process of partitioning an image into different meaningful segments. (wikipedia.org)
  • Although there are many computer vision techniques for image segmentation, some have been adapted specifically for medical image computing. (wikipedia.org)
  • Image registration is a process that searches for the correct alignment of images. (wikipedia.org)
  • These outgoing waves eventually bounce off some distant object and return an echo to the sender, where they are received, amplified, and processed electronically to yield an image showing the object's location. (encyclopedia.com)
  • Focal points of independent and contract research conducted by Fraunhofer HHI are photonic components and systems, fiber optic sensor systems, and image signal processing and transmission. (wikipedia.org)
  • These spectrums or time plots are then "laid side by side" to form the image or a three-dimensional surface, or slightly overlapped in various ways, i.e. windowing. (wikipedia.org)
  • By reversing the process of producing a spectrogram, it is possible to create a signal whose spectrogram is an arbitrary image. (wikipedia.org)
  • certain
  • These services were earlier provided for ships, then the after certain time passed and new technology grew this service was also provided for the aircraft and now, according to the recent convention the land users of mobile can also get the service throughout the world. (wiretrip.net)
  • sound
  • In my own work, the granular concept has informed most of my processing of sampled sound, the most striking application being to stretch the sound in time without necessarily changing its pitch. (sfu.ca)
  • The factor contributing to the larger than life sound is greatly attributed to the design of the transformer which seems to add subharmonics to the signal. (wikipedia.org)
  • phase
  • The analogy to the Heisenberg uncertainty principle of quantum physics is not metaphorical but exact, because just as velocity is the rate of change of position (hence the accuracy of determination of one is linked to a lack of accuracy in the other), so frequency can be thought of as the rate of change of temporal phase. (sfu.ca)
  • Ideally, both filters should be brickwall filters, constant phase delay in the pass-band with constant flat frequency response, and zero response from the Nyquist frequency. (wikipedia.org)
  • Practical filters have non-flat frequency or phase response in the pass band and incomplete suppression of the signal elsewhere. (wikipedia.org)
  • For this reason, it is not possible to reverse the process and generate a copy of the original signal from a spectrogram, though in situations where the exact initial phase is unimportant it may be possible to generate a useful approximation of the original signal. (wikipedia.org)
  • different
  • Fan-like images due to modalities such as curved-array ultrasound are also common and require different representational and algorithmic techniques to process. (wikipedia.org)
  • flight
  • Flight computers installed in many gliders also use GNSS to compute wind speed aloft, and glide paths to waypoints such as alternate airports or mountain passes, to aid en route decision making for cross-country soaring. (wikipedia.org)
  • original
  • As a rule of thumb, we suggest that the added noise should be of infinitesimal magnitude so as to minimize the interaction between the added noise and original clean signal. (nih.gov)
  • provide
  • Systematically evaluating the association of low frequency and rare variants can provide new insights regarding the genetic architecture of protein biomarkers. (pubmedcentralcanada.ca)
  • physics
  • At this level, concepts of frequency and time are conjoined by a quantum relationship, with an uncertainty principle relating them that is precisely analogous to the more famous uncertainty principle of quantum physics. (sfu.ca)
  • approximate
  • By this time, the vehicle had reached its approximate orbital altitude, and the third stage burn was just long enough to reach a circular parking orbit. (wikipedia.org)
  • audio
  • Multiple audio files may be synchronized using energy vectors produced from energy portions of individual frequency energy representations. (patents.com)
  • Embodiments relate to an audio processing unit that includes a buffer, bitstream payload deformatter, and a decoding subsystem. (patents.com)
  • This signal was fed into an audio amplifier and played back by a loudspeaker. (wikipedia.org)