Výsledky vyhledávání

Method for rapidly determining and reconstructing the peak arterial frame from a time-resolved CE-MRA exam

Autor: T J, Carroll, F R, Korosec, J S, Swan, T M, Grist, R, Frayne, C A, Mistretta

Publikováno v: Magnetic resonance in medicine. 44(5)

A method that determines the information necessary to reconstruct a single vascular image from a time-resolved CE-MRA exam is presented. Raw k-space data are used to approximate the time course of the contrast passage prior to image reconstruction. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::c0d3e8e67789e425cfb045f0ceaea45b
https://pubmed.ncbi.nlm.nih.gov/11064419

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3D MR DSA: effects of injection protocol and image masking

Autor: R, Frayne, T M, Grist, J S, Swan, D C, Peters, F R, Korosec, C A, Mistretta

Publikováno v: Journal of magnetic resonance imaging : JMRI. 12(3)

The purpose of this study was to investigate the effect on three-dimensional (3D) magnetic resonance digital subtraction angiography (MR DSA) images of various injection protocol parameters (ie, injection order, volume, and rate), as well as image ma

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::7df2293368abe2a06a8b3e8d15a1e623
https://pubmed.ncbi.nlm.nih.gov/10992316

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Phase-contrast with interleaved undersampled projections

Autor: A V, Barger, D C, Peters, W F, Block, K K, Vigen, F R, Korosec, T M, Grist, C A, Mistretta

Publikováno v: Magnetic resonance in medicine. 43(4)

MR phase-contrast techniques provide velocity-sensitive angiograms and quantitative flow measurements but require long scan times. Recently it has been shown that undersampled projection reconstruction can acquire higher resolution per unit time than

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::b0fded6a1715d1fe8452cef986f13b5d
https://pubmed.ncbi.nlm.nih.gov/10748424

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Undersampled projection reconstruction applied to MR angiography

Autor: D C, Peters, F R, Korosec, T M, Grist, W F, Block, J E, Holden, K K, Vigen, C A, Mistretta

Publikováno v: Magnetic resonance in medicine. 43(1)

Undersampled projection reconstruction (PR) is investigated as an alternative method for MRA (MR angiography). In conventional 3D Fourier transform (FT) MRA, resolution in the phase-encoding direction is proportional to acquisition time. Since the PR

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::f63c2931b52684ce8f79a5896939d5ef
https://pubmed.ncbi.nlm.nih.gov/10642735

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Contrast-enhanced MR angiography of the carotid bifurcation

Autor: F R, Korosec, P A, Turski, T J, Carroll, C A, Mistretta, T M, Grist

Publikováno v: Journal of magnetic resonance imaging : JMRI. 10(3)

With contrast-enhanced MR angiographic techniques, a T1-shortening contrast agent is injected into the blood stream. Imaging during the first pass of the contrast agent permits acquisition of a high-contrast MR angiogram. Scan parameters such as flip

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::7732f1af23dcc6d170561f7bc867c207
https://pubmed.ncbi.nlm.nih.gov/10508293

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MR angiography: basic principles and theory

Autor: F R, Korosec, C A, Mistretta

Publikováno v: Magnetic resonance imaging clinics of North America. 6(2)

The most commonly used MR angiography techniques are categorized as time-of-flight, phase-contrast, or contrast-enhanced methods. When the basic principles of the various MR angiographic methods are understood, the techniques can be used to achieve h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::e391168ca0ec51da4e4dabc2952506cf
https://pubmed.ncbi.nlm.nih.gov/9560484

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MR angiography with three-dimensional MR digital subtraction angiography

Autor: R, Frayne, T M, Grist, F R, Korosec, D S, Willig, J S, Swan, P A, Turski, C A, Mistretta

Publikováno v: Topics in magnetic resonance imaging : TMRI. 8(6)

We have developed a time-resolved, contrast-enhanced, volume-imaging technique for magnetic resonance (MR) angiography, known as three-dimensional (3D) MR digital subtraction angiography (DSA). This technique greatly improves MR angiogram quality bec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::bd3a490d742504987300a641f03a102f
https://pubmed.ncbi.nlm.nih.gov/9402678

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Investigators refine MR angio methods

Autor: T M, Grist, J S, Swan, F R, Korosec

Publikováno v: Diagnostic imaging. 18(4)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::faa1d9bd3d12bfade14681b08ec46c22
https://pubmed.ncbi.nlm.nih.gov/10159857

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ECG-optimized phase contrast line-scanned MR angiography

Autor: F R, Korosec, C A, Mistretta, P A, Turski

Publikováno v: Magnetic resonance in medicine. 24(2)

We describe a rapid phase contrast line scan MR angiographic imaging technique. A projection angiogram is obtained by sequentially imaging a series of thin slices oriented perpendicular to the primary flow direction. Bipolar gradient subtraction is e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::a1a67f71a83bd0db6179f2c46beafc81
https://pubmed.ncbi.nlm.nih.gov/1569863

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