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Titolo:
Phase contrast MRI with improved temporal resolution by view sharing: k-space related velocity mapping properties
Autore:
Markl, M; Hennig, J;
Indirizzi:
Univ Freiburg, Dept Radiol, Sect Med Phys, Freiburg, Germany Univ Freiburg Freiburg Germany Radiol, Sect Med Phys, Freiburg, Germany
Titolo Testata:
MAGNETIC RESONANCE IMAGING
fascicolo: 5, volume: 19, anno: 2001,
pagine: 669 - 676
SICI:
0730-725X(200106)19:5<669:PCMWIT>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
MYOCARDIAL MOTION TRACKING; MAGNETIC-RESONANCE; BLOOD-FLOW; IMAGING TECHNIQUE; IN-VITRO; QUANTIFICATION; VALIDATION; VOLUNTEERS; BRISK;
Keywords:
phase contrast; CINE imaging; velocity mapping; flow quantification; motion quantification;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Markl, M Univ Freiburg, Dept Radiol, Sect Med Phys, Freiburg, Germany UnivFreiburg Freiburg Germany ect Med Phys, Freiburg, Germany
Citazione:
M. Markl e J. Hennig, "Phase contrast MRI with improved temporal resolution by view sharing: k-space related velocity mapping properties", MAGN RES IM, 19(5), 2001, pp. 669-676

Abstract

Phase contrast techniques in combination with k-space segmented CINE imaging are widely used for the quantitative assessment of blood flow or tissue motion. The temporal resolution of the corresponding pulse sequences plays an important role concerning the potential of the method to fully detect time resolved flow or motion patterns. A further improvement of temporal or spatial resolution in phase contrast CINE MRI can be achieved by the application of view sharing. Based on simulations with point-spread-functions resulting from different cyclic flow or motion patterns an analysis of view sharing techniques in combination with phase contrast MRI is presented. Velocity mapping properties and the role of different k-space regions concerning the resulting values in the phase images and thus encoded velocities were investigated. It could be shown that the velocity induced phase shifts in phase contrast techniques are mainly encoded in the central sections of k-space which makes view sharing also suitable for velocity mapping. As a resultthe use of appropriate sampling and data acquisition schemes permits the assessment of flow or motion patterns with significantly improved temporal resolution without loss of functional information. In addition phantom measurements with an oscillation phantom were performed in order to validate thesimulation results and to demonstrate the potential of view sharing techniques to accelerate phase contrast imaging and improve the detection of the underlying flow or motion dynamics. (C) 2001 Elsevier Science Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 13:26:57