12,330 Hits in 9.1 sec

Page 370 of Journal of Engineering Mathematics Vol. 47, Issue 3-4 [page]

2003 Journal of Engineering Mathematics  
Magnetic-resonance angiography (MRA) images typically consist in a stack of 2D slices of constant width covering the volume of interest.  ...  Physiologic flow-velocity measurements can be obtained non-invasively using phase- contrast magnetic-resonance (PC-MR) techniques.  ... 

Medical image diagnostics based on computer-aided flow analysis using magnetic resonance images

Kelvin K.L. Wong, Zhonghua Sun, Jiyuan Tu, Stephen G. Worthley, Jagannath Mazumdar, Derek Abbott
2012 Computerized Medical Imaging and Graphics  
This review paper focuses on an overview of a flow analysis scheme based on computer-aided evaluation of magnetic resonance intensity images, in comparison with other commonly used medical imaging modalities  ...  Diagnostic imaging modalities such as computed tomography and magnetic resonance imaging provide excellent anatomical information on myocardial structures, but fail to show the cardiac flow and detect  ...  and analytical processes, which can describe flow behavior in cardiac chambers by processing magnetic resonance images of blood in motion.  ... 
doi:10.1016/j.compmedimag.2012.04.003 pmid:22575846 fatcat:s75lchigang4jceihlwczkc674

Magnetic resonance imaging of oscillating electrical currents

N. W. Halpern-Manners, V. S. Bajaj, T. Z. Teisseyre, A. Pines
2010 Proceedings of the National Academy of Sciences of the United States of America  
We apply this method in a current loop phantom, mapping its magnetic field and achieving a detection sensitivity near the threshold required for the detection of neuronal currents.  ...  We further demonstrate the combination of these methods with remote detection, a technique in which the encoding and detection of an MRI experiment are separated by sample flow or translation.  ...  Here, we demonstrate that, in addition to its advantages over phase and magnitude imaging, current imaging through a resonant mechanism permits spectroscopic control over the contrast mechanism.  ... 
doi:10.1073/pnas.1003146107 pmid:20421504 pmcid:PMC2889347 fatcat:ch2fmflxdrdvpevu3kjjh573fe

Constrained simulations of flow in haemodynamic devices: towards a computational assistance of magnetic resonance imaging measurements

I. Cenova, D. Kauzlaric, A. Greiner, J. G. Korvink
2011 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
Today magnetic resonance imaging (MRI) delivers, in addition to the morphology of the cardiovascular system, blood flow patterns.  ...  It is observed that blood flow dynamics play an important role in the aetiology of atherosclerosis. Especially, the blood velocity distribution is an important indicator for predisposition regions.  ...  The authors are grateful to the University Clinic in Freiburg, Germany for providing measurements data and the German Science Foundation DFG for financial support in the framework of SFB499.  ... 
doi:10.1098/rsta.2011.0028 pmid:21576164 fatcat:eosactj7tnavfhrb6ppkigjmgq

Quantitative Perfusion Imaging with Pulsed Arterial Spin Labeling: A Phantom Study

2007 Magnetic Resonance in Medical Sciences  
Purpose: Pulsed arterial spin labeling (PASL) is a magnetic resonance (MR) method for measuring cerebral blood ‰ow.  ...  We compared the true and theoretical ‰ow rates in a ‰ow phantom to conˆrm the analytical validity of quantitative perfusion imaging with Q2TIPS sequence.  ...  Acknowledgements This work was supported by grants from the Grant-in-Aid for Scientiˆc Research of Japan Society for the Promotion of Science.  ... 
doi:10.2463/mrms.6.91 pmid:17690539 fatcat:x6xfehvajjfkpnxpq6mzliilla

3D volume extraction of cerebrovascular structure on brain magnetic resonance angiography data sets

Do-Yeon Kim
2012 Journal of Biomedical Science and Engineering  
In particular, computer algorithms for the delineation of anatomical structures and other regions of interest, which are called image segmentation, play a vital role in numerous biomedical imaging applications  ...  The use of computers in facilitating their processing and analysis has become necessary with the increaseing size and number of medical images.  ...  MRA is a non-invasive MRI-based flow imaging technique, and it provides images of blood vessels in detail without any contrast agent.  ... 
doi:10.4236/jbise.2012.510070 fatcat:xptsfflurrb4dcmhexmmxdwmtm

Hemodynamic Measurement Using Four-Dimensional Phase-Contrast MRI: Quantification of Hemodynamic Parameters and Clinical Applications

Hojin Ha, Guk Bae Kim, Jihoon Kweon, Sang Joon Lee, Young-Hak Kim, Deok Hee Lee, Dong Hyun Yang, Namkug Kim
2016 Korean Journal of Radiology  
Recent improvements have been made to the use of time-resolved, three-dimensional phase-contrast (PC) magnetic resonance imaging (MRI), which is also named four-dimensional (4D) PC-MRI or 4D flow MRI,  ...  in the investigation of spatial and temporal variations in hemodynamic features in cardiovascular blood flow.  ...  Application of a pressure catheter has been a gold standard method for measuring the pressure values in vivo. However, it is not preferred due to its invasiveness.  ... 
doi:10.3348/kjr.2016.17.4.445 pmid:27390537 pmcid:PMC4936168 fatcat:g2ppakxrz5g2tlf6zlwfbivope

Non-contrast coronary magnetic resonance angiography: current frontiers and future horizons

Yoko Kato, Bharath Ambale-Venkatesh, Yoshimori Kassai, Larry Kasuboski, Joanne Schuijf, Karan Kapoor, Shelton Caruthers, Joao A. C. Lima
2020 Magnetic Resonance Materials in Physics, Biology and Medicine  
Coronary magnetic resonance angiography (coronary MRA) is advantageous in its ability to assess coronary artery morphology and function without ionizing radiation or contrast media.  ...  Nonetheless, each of these limitations can be specifically addressed by a combination of novel technologies including super-resolution imaging, compressed sensing, and deep-learning reconstruction.  ...  JS and KK helped in critical revision. All authors contributed to the idea for the article. All authors read and approved the final manuscript.  ... 
doi:10.1007/s10334-020-00834-8 pmid:32242282 fatcat:cu4vrtjuwvatneey7gg4jxxbla

Review of Journal of Cardiovascular Magnetic Resonance 2015

D. J. Pennell, A. J. Baksi, S. K. Prasad, R. H. Mohiaddin, F. Alpendurada, S. V. Babu-Narayan, J. E. Schneider, D. N. Firmin
2016 Journal of Cardiovascular Magnetic Resonance  
There were 116 articles published in the Journal of Cardiovascular Magnetic Resonance (JCMR) in 2015, which is a 14% increase on the 102 articles published in 2014.  ...  in a single article in relation to each other and other recent JCMR articles.  ...  Consent for publication Not applicable. Ethics approval and consent to participate Not applicable. Supporting data Not applicable.  ... 
doi:10.1186/s12968-016-0305-7 pmid:27846914 pmcid:PMC5111217 fatcat:xpe47w5atvcilebmccg4ut7xgm

Review of journal of cardiovascular magnetic resonance 2010

Dudley J Pennell, David N Firmin, Philip J Kilner, Warren J Manning, Raad H Mohiaddin, Sanjay K Prasad
2011 Journal of Cardiovascular Magnetic Resonance  
There were 75 articles published in the Journal of Cardiovascular Magnetic Resonance (JCMR) in 2010, which is a 34% increase in the number of articles since 2009.  ...  (CMR) so that you could review areas of interest from the previous year in a single article in relation to each other and other recent JCMR articles [1].  ...  Acknowledgements and Funding  ... 
doi:10.1186/1532-429x-13-48 pmid:21914185 pmcid:PMC3182946 fatcat:ag5xgqc7gzaajfhjmuqhocywse

Steady-state MRI: methods for neuroimaging

Karla L Miller, Rob HN Tijssen, Nikola Stikov, Thomas W Okell
2011 Imaging in Medicine  
for imaging flowing blood.  ...  Pike GB: Pulsed magnetization transfer contrast in gradient echo imaging: a two-pool analytic description of signal response. Magn. Reson. Med. 35, 95-103 (1996).  ... 
doi:10.2217/iim.10.66 fatcat:ld72dumt3nfp5ceoasqiqmjaai

Computer Simulation of the SWI Protocol in Nuclear Magnetic Resonance Imaging [chapter]

Grzegorz Izydorczyk, Artur Klepaczko
2014 Lecture Notes in Computer Science  
The ultimate application of the proposed system is to provide a framework for quantitative validation of SWI image processing algorithms.  ...  SWI is based on field non-uniformity caused by local susceptibility distribution and thus resulting in both measured signal phase shift and faster decay of transverse magnetization vector.  ...  It is assumed that the flow is fully compensated and thus it does not introduce additional phase errors.  ... 
doi:10.1007/978-3-319-11331-9_36 fatcat:l253o2qkfnbkrhenhkwimiolri

Absolute Oxygenation Metabolism Measurements Using Magnetic Resonance Imaging

Hongyu An, Qingwei Liu, Cihat Eldeniz, Weili Lin
2011 The Open Neuroimaging Journal  
Cerebral oxygen metabolism plays a critical role in maintaining normal function of the brain. It is the primary energy source to sustain neuronal functions.  ...  Keywords: Magnetic resonance imaging, oxygenation metabolism quantification, blood oxygenation level dependent, cerebral oxygen saturation, oxygen extraction fraction, cerebral metabolic rate of oxygen  ...  ACKNOWLEDGEMENTS This study was supported by grants from National Institute of Health (NIH 5R01NS054079) and American Heart Association (AHA 0730321N).  ... 
doi:10.2174/1874440001105010120 pmid:22276084 pmcid:PMC3256581 fatcat:w257nb6cdzb4rk6wle5wsvqasq

Journal of Cardiovascular Magnetic Resonance: 2017/2018 in review

Warren J. Manning
2019 Journal of Cardiovascular Magnetic Resonance  
There were 89 articles published in the Journal of Cardiovascular Magnetic Resonance (JCMR) in 2017, including 76 original research papers, 4 reviews, 5 technical notes, 1 guideline, and 3 corrections.  ...  It has been a tremendous experience for me and the opportunity to review manuscripts that reflect the best in our field remains a great joy and highlight of my week!  ...  Validation of a rapid semi-automated method to assess left atrial longitudinal phasic strains on cine cardiovascular magnetic resonance imaging.  ... 
doi:10.1186/s12968-019-0594-8 pmid:31884956 fatcat:rw4kskehrrgqpgy3jna26xsm3i

A Review on Image Reconstruction through MRI k-Space Data

Tanuj Kumar Jhamb, Vinith Rejathalal, V.K. Govindan
2015 International Journal of Image Graphics and Signal Processing  
This paper provides a complete overview of image reconstruction process in MRI (Magnetic Resonance Imaging). It reviews the computational aspect of medical image reconstruction.  ...  Various modern magnetic resonance imaging techniques like functional MRI, diffusion MRI have also been introduced.  ...  An increase in the volume of blood flow causes a small variation in the MR signal owing to a change in the concentration of oxygenated hemoglobin.  ... 
doi:10.5815/ijigsp.2015.07.06 fatcat:caeg26dtabhbpmez566wnvukda
« Previous Showing results 1 — 15 out of 12,330 results