• The diffusion coefficient was found to increase during curing, suggesting microstructural changes in the meat. (slu.se)
  • Apparent diffusion coefficient (ADC) maps showed that meat microstructures shrunk when cured with 20% (w/w) NaCl brine. (slu.se)
  • Two radiologists measured apparent diffusion coefficient (ADC) values and CTP parameters independently. (hindawi.com)
  • The aim of the study is to evaluate the diagnostic performance of apparent diffusion coefficient (ADC) and apparent kurtosis coefficient (Kapp) for the characterization of prostate lesions on 1.5T MRI. (embj.org)
  • The purpose of this study was to assess quantitatively the mandibular bone marrow of patients with and without diabetes mellitus (DM) using the apparent diffusion coefficient (ADC) values on diffusion -weighted imaging (DWI). (bvsalud.org)
  • We evaluated the repeatability of the apparent diffusion coefficient (ADC) measurement, the temporal evolution of ADC change after sonication, and its relationship with thermal parameters. (springeropen.com)
  • Quantification of DWI changes using the apparent diffusion coefficient (ADC) has also been used as part of a multi-parametric MR assessment of residual disease after clinical prostate HIFU treatments [ 12 ]. (springeropen.com)
  • Objective The objective of this study was to compare the image quality and apparent diffusion coefficient (ADC) of diffusion-weighted imaging (DWI) with modified reduced field of view (FOV) based on 2-dimensional (2D)-selective radiofrequency excitations by tilting the excitation plane in prostate with reduced FOV using parallel-transmit-accelerated 2D-selective radiofrequency excitation and single-shot echo planar imaging (ssEPI). (ewha.ac.kr)
  • Apparent diffusion coefficient measurements were performed for quantitative analysis. (ewha.ac.kr)
  • the aim of this work is to determine the role of diffusion-weighted magnetic resonance imaging (DW-MRI) and the apparent diffusion coefficient (ADC) in the differentiation between benign and malignant solid head and neck masses by comparing diagnostic performance of low b values (0.50 and 400 s/mm 2 ) versus high b values (800 and 1000 s/mm 2 ) and comparing the result with histopathological finding. (springeropen.com)
  • DWI was used to evaluate microscopic water diffusion within tissues which measured by means of apparent diffusion coefficient (ADC), areas of low ADC values within tumors of different regions correlate with areas of increased cellularity within tumors. (springeropen.com)
  • In this latter situation, the self-diffusion coefficient of water reduces according to the geometry and surface properties of the pore and to the concentration of suspended biomolecules or nanoparticles in the pore, as extensively demonstrated in a previous study. (springer.com)
  • Using molecular dynamics and previous results from the literature, we demonstrate the correlation between the self-diffusion coefficient of water in silica nanopores and the concentration of proteins or nanoparticles contained therein. (springer.com)
  • Using qPCR, empirical correlations for quantitative biofilm density as a function of T 1 -, T 2 and the diffusion coefficient as well as its spatial distribution will be derived. (uni-bremen.de)
  • The purpose of our study was to compare the apparent diffusion coefficient (ADC) derived from diffusion-weighted imaging (DWI) of prostate cancer (PCa) patients with three classes of pathological Gleason scores (GS). (hindawi.com)
  • The apparent diffusion coefficient (ADC) values were calculated from the DWI data of patients with three different Gleason scores. (hindawi.com)
  • Prostate cancer tumors and comparative normal tissue from each patient were contoured on both apparent diffusion coefficient and MddMRI-derived mean diffusivity (MD) maps (from which microscopic diffusion heterogeneity [MKi] and microscopic. (lu.se)
  • The relatively recent development of the MRI techniques of diffusion and perfusion imaging, described in this thesis, have the capability to fill this gap. (ucl.ac.uk)
  • The diffusive mobility of water is a sensitive indicator of tissue energy status, and perfusion imaging provides quantitative measurements of cerebral blood flow (CBF). (ucl.ac.uk)
  • Rather, survival seems to be primarily correlated with the histologic features, clinical findings (age at onset, epilepsy vs deficit), and radiologic criteria (especially contrast enhancement and perfusion-weighted imaging). (medscape.com)
  • The aim of this study was to compare diffusion-weighted magnetic resonance imaging (DWI) with computed tomography perfusion (CTP) for preoperative detection of metastases to lymph nodes (LNs) in head and neck squamous cell carcinoma (SCC). (hindawi.com)
  • Recently, other functional imaging techniques such as MRI diffusion-weighted imaging (DWI) and CT perfusion imaging (CTP) have shown promise in detecting metastatic cervical LNs, and there is increasing experience in head and neck SCC. (hindawi.com)
  • OBJECTIVE: To explore the utility of intravenous (i.v.) prourokinase treatment, we compared intra-arterial (i.a.) and i.v. delivery in a rat embolic stroke model, using diffusion (DWI) and perfusion (PI) magnetic resonance imaging to assess in vivo effects on ischemic lesion evolution and reperfusion. (umassmed.edu)
  • Although DW-MRI in diagnosis of head and neck masses had been well analyzed in previous studies, the choice of suitable b value for imaging is still a diagnostic dilemma as factors causing passive diffusion, such as capillary perfusion, can contribute to decreased signal-to-noise ratio (SNR) in low b value DW-MRI. (springeropen.com)
  • Perfusion-weighted imaging (PWI). (mayo.edu)
  • However, with MRI, this interval has been greatly reduced.Computed tomography (CT) scanning and magnetic resonance imaging (MRI) are complementary techniques for imaging oligodendrogliomas. (medscape.com)
  • There are various diagnostic tests that can be used for its detection, such as cerebrospinal spinal fluid (CSF) cytology, electromyography (EMG), magnetic resonance imaging (MRI), and positron-emission tomography/computed tomography (PET/CT). (researchgate.net)
  • Although ultrasound, routine contrast-enhanced computed tomography (CT) and magnetic resonance imaging (MRI) allow the detection of enlarged cervical LNs, none of these methods can distinguish between benign and malignant causes of enlargement with any accuracy [ 7 ], as they use standard parameters (shape, size, internal architecture, extranodal invasion, and vascular features) that are nonspecific for malignancy [ 8 , 9 ]. (hindawi.com)
  • Single photon emission computed tomography (SPECT) and positron-emission tomography (PET) are imaging techniques that supply functional information, but they involve radiation exposure and are expensive with low availability and are hampered by relatively low spatial resolution [ 10 - 13 ]. (hindawi.com)
  • Although contrast-enhanced computed tomography (CT) scanning and nonenhanced magnetic resonance imaging (MRI) can reveal a DVA, the preferred imaging technique is contrast-enhanced MRI because of its excellent depiction of the small venules and draining vein. (medscape.com)
  • Computed Tomography (CT) Computed tomography (CT) is a type of medical imaging that combines a series of x-rays to create cross-sectional, detailed images of internal structures. (msdmanuals.com)
  • OBJECTIVES: The objectives of this exploratory study were to investigate the feasibility of multidimensional diffusion magnetic resonance imaging (MddMRI) in assessing diffusion heterogeneity at both a macroscopic and microscopic level in prostate cancer (PCa). (lu.se)
  • Fractional anisotropy (FA), a common DTI measurement of water diffusion properties, was used as a marker of WM microstructure integrity. (cdc.gov)
  • My interdisciplianry research team is focused on the development of innovative magnetic resonance imaging (MRI) and spectroscopy methods to characterise the structure, function and physiology of human tissues and organs through non-invasive and repeatable scans. (ncl.ac.uk)
  • We demonstrate the utility of AQP1 in vivo by imaging gene expression in intracranial tumor xenografts. (biorxiv.org)
  • In this paper, a unique combination of magnetization transfer, diffusion imaging and histology is presented, providing a novel method for in vivo magnetic resonance imaging of the axon volume fraction and the myelin g-ratio. (nih.gov)
  • A multi-b diffusion weighted MR imaging measurement was performed to examine the effects of AQP inhibition to normal and liver-fibrotic rats in vivo. (gitlab.io)
  • In vivo MRI experiments demonstrated that the proposed method could effectively suppress motion artifacts and off-resonance artifacts and achieve images with fine structures. (ox.ac.uk)
  • I am Director of the Centre for In Vivo Imaging , which represents Newcastle University's in vivo imaging portfolio. (ncl.ac.uk)
  • Diffusion tensor imaging segments the human amygdala in vivo. (mpg.de)
  • Isotropic high resolution diffusion imaging of human habenula in vivo at 7T. (mpg.de)
  • Diffusion tensor MRI can anatomically segment human amygdaloid subregions in vivo. (mpg.de)
  • The most frequent finding with angiography is a vascular void (see the image below). (medscape.com)
  • Flow imaging, MR angiography, cardiac gated imaging. (abdn.ac.uk)
  • High-resolution magnetic resonance angiography (MRA). (mayo.edu)
  • Angiography can help make the diagnosis of ovarian vein thrombosis, but this technique is not usually performed because of the availability of noninvasive, cross-sectional imaging methods. (medscape.com)
  • The Clinical Magnetic Resonance Imaging facility is housed within the Centre for Medical Imaging and Function at Skåne University Hospital in Lund. (lu.se)
  • Many lesions are detected at clinical examination, but imaging techniques are also necessary for accurate characterization of biological aggressiveness and better staging and management [ 1 ]. (springeropen.com)
  • In this project, magnetic resonance imaging (MRI) is applied for the characterization of electroactive biofilms in porous electrodes. (uni-bremen.de)
  • This image shows hypoattenuation of the left frontal lobe without contrast enhancement. (medscape.com)
  • Magnetic resonance (MR)-guided high-intensity focused ultrasound (HIFU) can palliate metastatic bone pain by periosteal neurolysis. (springeropen.com)
  • Magnetic resonance (MR)-guided high-intensity focused ultrasound (HIFU) offers a safe and effective treatment option for the palliation of pain from bone metastases by thermal neurolysis at the periosteum [ 1 , 2 ]. (springeropen.com)
  • Ultrasound (US), magnetic resonance imaging (MRI), and CT scanning with contrast are the best radiologic modalities for making the diagnosis of ovarian vein thrombosis. (medscape.com)
  • Examination of molecular diffusion using DWI performs with an EPI (echo planar imaging) sequence and a linear regression after a logarithmic transformation of the signal intensity was used to calculate the ADC values [ 14 ]. (hindawi.com)
  • Gadolinium agents change the magnetic field in a way that makes images clearer. (msdmanuals.com)
  • Cardiovascular magnetic resonance (CMR) can through the two methods 3D FLASH and diffusion tensor imaging (DTI) give complementary information on the local orientations of cardiomyocytes and their laminar arrays. (biomedcentral.com)
  • With advancements in imaging methods, several noninvasive imaging techniques have arisen, with the potential for identifying benign and metastatic LNs in head and neck SCC, thus avoiding the complications due to biopsy sampling [ 6 ]. (hindawi.com)
  • Methods Fifty patients who underwent multiparametric magnetic resonance imaging including 3 DWIs were included. (ewha.ac.kr)
  • I lead projects on the development and application of new lung ventilation imaging methods that can quantify lung function and detect changes due to lung disease and the impacts of therapies. (ncl.ac.uk)
  • We are developing new methods to image lung ventilation properties, using 19 F-MRI of MR-visible gases that can safely be inhaled. (ncl.ac.uk)
  • our interdisciplinary research team brings together physicists, bioscientists, clinical scientists and clinicians to demonstrate the clinical utilities of these new lung imaging methods, and we work with healthcare and industrial partners to advance our technologies into use in routine clinical practice. (ncl.ac.uk)
  • We are developing advanced scan methods to image the distribution of lithium in patients who take lithium carbonate as treatment for bipolar disorder. (ncl.ac.uk)
  • Proton and sodium magnetic resonance imaging were used to determine the diffusion behaviour of brine (NaCl) in porcine Longissimus dorsi and semitendinosus. (slu.se)
  • Baseline proton resonance frequency shift (PRFS) thermometry evaluated the accuracy of temperature measurements and tissue cooling times after exposure. (springeropen.com)
  • 1 s) [ 3 ], thermal monitoring is undertaken using the proton resonance frequency shift (PRFS) method. (springeropen.com)
  • Axial proton density-weighted image shows an area of marked signal intensity loss in the right cerebellum adjacent to the developmental venous anomaly (DVA). (medscape.com)
  • Upper cervical spinal cord cross-sectional area in relapsing remitting multiple sclerosis: application of a new technique for measuring cross-sectional area on magnetic resonance images. (nottingham.ac.uk)
  • During an MRI, a computer records changes in the magnetic field around a person's body to create cross-sectional, detailed images. (msdmanuals.com)
  • It has become the leading cross-sectional imaging method in clinical practice and continuous technical improvements have significantly broadened the scope of applications. (lu.se)
  • The conventional magnetic resonance (MR) findings of the disease are characteristic and include ovoid lesions with high signal intensity at T2-weighted MRI. (uludag.edu.tr)
  • Limited information exists about the diffusion-weighted MRI characteristics of these lesions vanishing completely after a period of time. (uludag.edu.tr)
  • Central veins in brain lesions visualized with high-field magnetic resonance imaging: a pathologically specific diagnostic biomarker for inflammatory demyelination in the brain JAMA Neurology. (nottingham.ac.uk)
  • Our goal was to establish the ante mortem diagnosis of sCJD subtype, based on patient-specific estimates of the spatiotemporal cascade of lesions detected by diffusion-weighted magnetic resonance imaging (DWI). (cdc.gov)
  • Our 7Li-MRI scans allow MR imaging of this pharmaceutical agent in its target organ, allowing direct but non-invasive measurement of how the concentration of lithium varies across the brain and over time. (ncl.ac.uk)
  • Direct and spatially resolved measurement of parameters such as biofilm density or diffusion coefficients are essential to improve the existing models and evaluate the effectiveness of the porous electrodes. (uni-bremen.de)
  • To determine if tumor diffusion heterogeneity is similar on macroscopic and microscopic scales, the linear association between SD of MD and mean MKi was estimated using robust regression (bisquare weighting). (lu.se)
  • A supplementary experiment proved that the diffusion behaviour of sodium chloride in regions of meat with connective tissue/fat is distinctive from regions with pure myofilament tissue, as anticipated. (slu.se)
  • We investigated the value of diffusion-weighted imaging (DWI) for monitoring soft tissue changes adjacent to bone during MR-guided HIFU. (springeropen.com)
  • Diffusion-weighted imaging (DWI) is an alternative contrast mechanism that has been shown to identify tissue changes during pre-clinical thermal treatments of canine prostate tumours [ 9 , 10 ] and murine tumour models [ 11 ]. (springeropen.com)
  • In T 2 -weighted imaging, regions of PCa show decreased signal intensity relative to normal peripheral (PZ) tissue because of increased cell density and a loss of prostatic ducts [ 8 ]. (hindawi.com)
  • The energy is released from the excited tissue over a short period according to 2 relaxation constants known as T1 and T2, and the emitted energy signals are converted into images. (medscape.com)
  • High-quality images of small animals and excised tissue can be obtained. (lu.se)
  • The high-field environment sensitises the images to various artefacts and a novel enhancement of a standard rapid imaging technique was required in order to obtain accurate measurements. (ucl.ac.uk)
  • DWI is an MR technique that depicts molecular diffusion, which is the Brownian motion of water protons in biologic tissues. (hindawi.com)
  • We utilized the proposed method using multi-shot variable density spiral sequence to acquire MRI data and used auto-focusing technique for image deblurring. (ox.ac.uk)
  • Diffusion-weighted imaging (DWI) was an emerging non-invasive functional MRI technique made without administration of intravenous contrast agent and had reliable ability in discrimination between benign and malignant tissues [ 3 ]. (springeropen.com)
  • Diffusion-weighted imaging (DWI) is another MR-based technique that probes functional characteristics of tissues. (hindawi.com)
  • Magnetic Resonance Imaging (MRI) is a non-invasive medical imaging technique that uses a magnetic field and computer-generated radio waves to create detailed images. (lu.se)
  • Conclusions The modified reduced FOV DWI showed better overall image quality, differentiability of anatomic regions, and lesion conspicuity with fewer artifacts compared with DWI with reduced FOV and ssEPI. (ewha.ac.kr)
  • Fuzzy anatomical connectedness of the brain using single and multiple fibre orientation estimates from Diffusion MRI Journal of Computerized Medical Imaging and Graphics. (nottingham.ac.uk)
  • Magnetic resonance imaging (MRI) is a type of medical imaging that uses a strong magnetic field and very high frequency radio waves to produce highly detailed images. (msdmanuals.com)
  • Paramagnetic Contrast Agents Radiographic contrast agents are substances used to distinguish between internal structures in medical imaging, such as various types of x-rays and magnetic resonance imaging (MRI). (msdmanuals.com)
  • Because anaplastic oligoastrocytoma imaging findings mirror those of anaplastic oligodendroglioma, distinction cannot be reliably made on CT or MRI. (medscape.com)
  • Magnetic resonance imaging (MRI) provides incremental value to clinical findings in staging patients of intermediate risk. (hindawi.com)
  • Lhermitte Duclos Disease, Incidental Findings, Diagnostic Imaging. (bvsalud.org)
  • CT) when doctors need more detail about soft tissues-for example, to image abnormalities in the brain, spinal cord, muscles, and liver. (msdmanuals.com)
  • Cascades of diffusion MRI abnormalities in the brain are subtype-specific in sCJD. (cdc.gov)
  • High time-resolution sequences for rapid, quantitative diffusion imaging were implemented on both high-field and low-field MRI systems. (ucl.ac.uk)
  • Quantitative assessment of the mandibular bone marrow of diabetes mellitus patients using diffusion-weighted magnetic resonance imaging. (bvsalud.org)
  • Our projects span the intersection of magnetic resonance physics, bioscience and clinical research, and aim to develop reliable and valuable quantitative measurements for implementation in clinical research and development into robust tools used in clinical practice. (ncl.ac.uk)
  • On the low-field system, fast imaging of the trace of the diffusion tensor (trace(D)) was optimised and employed during a study of repeated ischaemic episodes that is a model of transient ischaemic attacks. (ucl.ac.uk)
  • Respirator usage protects brain white matter from welding fume exposure: a pilot magnetic resonance imaging study of welders. (cdc.gov)
  • In this preliminary study, we used diffusion tensor imaging (DTI) to investigate the effectiveness of respirator use in protecting workers' white matter (WM) from the harmful effects related to welding fume exposure. (cdc.gov)
  • EJF2: study conception, data en el hemicuello derecho con afectación del plexo braquial, adenopatías cervicales, infraclaviculares y axilares derechas. (bvsalud.org)
  • We proposed a diagnostic algorithm based on cascades of diffusion MRI abnormalities and demonstrated that it is accurate. (cdc.gov)
  • DTI was relatively insensitive to the number of diffusion directions and to time up to 72 hours post fixation, but was moderately affected by b-value (which was scaled by modifying diffusion gradient pulse strength with fixed gradient pulse separation). (biomedcentral.com)
  • therefore, to increase the b value during DW-MRI, a greater amplitude of the diffusion-sensitizing gradient is typically applied [ 4 ]. (springeropen.com)
  • they absorb the radiofrequency energy of the magnetic field and then release it until they relax completely. (medscape.com)
  • Its non-invasive nature and the ability to obtain images with a high degree of spatial resolution, have been exploited in this research as well as in routine clinical investigations. (ucl.ac.uk)
  • Clinical use of the Stejskal-Tanner diffusion weighted images is hampered by the geometric distortions that result from the large residual 3-D eddy current field induced. (univr.it)
  • Brain tractography using Q-ball imaging and graph theory: Improved connectivities through fibre crossings via a model-based approach Journal of Neuroimage. (nottingham.ac.uk)
  • By producing 3D images of ventilation properties over the entire lung we can detect subtle, regional changes that are a precursor to more serious lung disease, or make earlier detection of improvements in lung function in response to therapy. (ncl.ac.uk)
  • Voxel-wise linear regression models were used to examine structural and diffusion-weighted MRI data in 72 participants (31 young adults with ADHD and 41 controls without ADHD) in relation to diagnosis and the number of self-reported child and adult symptoms. (nih.gov)
  • Magnetic resonance imaging (MRI) is increasingly being used in the diagnosis and management of acute ischemic stroke and is sensitive and relatively specific in detecting changes that occur after such strokes. (medscape.com)
  • HIGHLIGHTS: Subtype diagnosis of sporadic Creutzfeldt-Jakob disease (sCJD) is achievable with diffusion MRI. (cdc.gov)
  • Non-contrast-enhanced CT (NECT) is the initial imaging tool for nonspecific neurologic symptoms, typically because of the need to quickly identify intracranial hemorrhage, ischemic infarction, or other acute abnormality. (medscape.com)
  • Coronal T1-weighted contrast-enhanced image obtained in a patient who had undergone surgery in the past for an arteriovenous malformation (AVM) shows bilateral developmental venous anomalies (DVAs) and the classic caput medusa appearance. (medscape.com)
  • Dr. Ment and her colleagues employ serial neurodevelopmental outcome measures coupled with volumetric, functional and diffusion tensor imaging strategies to assess the influence of these perturbations on neural connectivity and the relationship of connectivity to outcome. (yale.edu)
  • NaCl diffusion was visualized through images and diffusion coefficients were determined to be in the range 3-7 x 10(-10) m(2) s(-1), Which is in agreement with values reported in the literature. (slu.se)
  • The concept relies on the different diffusion behavior that water molecules exhibit in bulk and nanoconfined conditions, e.g., in nanopores. (springer.com)
  • For MRI, a person lies on a motorized table that is moved into the narrow interior of a large tubular scanner, which produces a strong magnetic field. (msdmanuals.com)
  • But when protons are surrounded by a strong magnetic field, as in an MRI scanner, they line up with the magnetic field. (msdmanuals.com)
  • We show that overexpression of the human water channel aquaporin 1 (AQP1) produces robust contrast in diffusion weighted MRI by increasing effective water diffusivity in tissues by over 100% without affecting cell viability or morphology. (biorxiv.org)
  • Examiners can change how various tissues appear on a scan by varying the radio wave pulses, the strength and direction of the magnetic field, and other factors. (msdmanuals.com)
  • The contrasts in the images result from different intensities of these emitted signals, which in turn result from different concentrations of the nuclei in different tissues in the body. (medscape.com)
  • Hydrogen (ie, protons) is the most common magnetic resonance (MR)-observable nucleus in the human body and has the advantage of being present in many different tissues in different concentrations. (medscape.com)
  • The model's performance was tested on diffusion weighted images of four normal volunteers, following distortion correction, the quality of the Stejskal-Tanner diffusion-weighted images was found to have comparable quality to image registration based corrections (FSL) at low b-values. (univr.it)
  • Unlike registration techniques the correction was not hindered by low SNR at high b-values, and results in improved image quality relative to FSL. (univr.it)
  • Joint correction for motion artifacts and off-resonance artifacts in multi-shot diffusion magnetic resonance imaging]. (ox.ac.uk)
  • Aiming at motion artifacts and off-resonance artifacts in multi-shot diffusion magnetic resonance imaging (MRI), we proposed a joint correction method in this paper to correct the two kinds of artifacts simultaneously without additional acquisition of navigation data and field map. (ox.ac.uk)
  • Magnetic resonance imaging (MRI) could enable such monitoring with high spatial and temporal resolution. (biorxiv.org)
  • The imaging features of the 1p/19q codeleted genotype that are considered typical of oligodendroglioma include indistinct tumor margin, heterogeneous signal intensity, and calcifications. (medscape.com)
  • This finding is nonspecific, however, because other diseases such as prostatitis or hyperplasia can also cause low signal intensity in T 2 -weighted imaging [ 9 - 12 ]. (hindawi.com)
  • We examined the conventional, FLAIR, and diffusion-weighted MR images of a patient complaining of depressive mood and anxiety disorder after 1 year receiving antiepileptic medication. (uludag.edu.tr)