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Titolo:
Experimental evaluation of vessel diameter from 0.3 to 8 mm in CE MR angiography.
Autore:
Vosshenrich, R; Engeroff, B; Muller, C; Fischer, U; Grabbe, E;
Indirizzi:
Univ Gottingen Klinikum, Abt Rontgendiagnost 1, D-37075 Gottingen, GermanyUniv Gottingen Klinikum Gottingen Germany D-37075 075 Gottingen, Germany
Titolo Testata:
ROFO-FORTSCHRITTE AUF DEM GEBIET DER RONTGENSTRAHLEN UND DER BILDGEBENDEN VERFAHREN
fascicolo: 9, volume: 173, anno: 2001,
pagine: 842 - 847
SICI:
1438-9029(200109)173:9<842:EEOVDF>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
GER
Soggetto:
TIME-OF-FLIGHT; BREATH-HOLD; IMAGE QUALITY; ARTERIES; STENOSIS;
Keywords:
MR angiography; MR contrast material; vascular stenoses; vascular phantom; sequence parameters;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Vosshenrich, R Univ Gottingen Klinikum, Abt Rontgendiagnost 1, Robert KochStr 40, D-37075 Gottingen, Germany Univ Gottingen Klinikum Robert Koch Str40 Gottingen Germany D-37075
Citazione:
R. Vosshenrich et al., "Experimental evaluation of vessel diameter from 0.3 to 8 mm in CE MR angiography.", ROFO-F RONT, 173(9), 2001, pp. 842-847

Abstract

Purpose: To evaluate the detection rate of vascular stenosis in contrast-enhanced 3D MR angiography using a flow phantom. Material and methods: The examinations were performed on a 1.5 T whole body imaging system (Magnetom Symphony/Quantum) with 30 mT/m gradient field strength using a body-phased-array coil. Different 3D sequences (TR/TE/FA < 5 ms/< 2 ms/25 degrees) with slice thicknesses ranging from 0.67 to 1.25 mm were applied. A gelantine-filled plastic cylinder with PVC tubes of 8 mm diameter was used as a vascular phantom. The tubes had concentric and excentric stenoses (50-90%) of different lengths. For the detection of different vessel diameters another phantom with 0.3 - 8 mm silicon tubes was used. Both systems were flushed with a solution of Gd-DTPA (0.15 mmol/l) and saline at flow rates from 50 to 200cm/s. The phantoms were positioned 0 degrees, 45 degrees, and 90 degrees towards the z-axis. Results: The degree of stenosis was under- and overestimated in less than 10 %. The sequence with the highest spatial resolution provided the best results. Detection and evaluation of tubes greater than or equal to 2 mm proved to be reliable. Conclusion: Contrast-enhanced 3D MR angiography provides an almost exact evaluation of the degree of stenosis in the phantom study. Evaluation of vessel diameters < 2 mm is not possible.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 13:35:28