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Titolo:
Automatic vessel segmentation using active contours in cine phase contrastflow measurements
Autore:
Kozerke, S; Botnar, R; Oyre, S; Scheidegger, MB; Pedersen, EM; Boesiger, P;
Indirizzi:
Univ Zurich, Inst Biomed Engn & Med Informat, CH-8092 Zurich, Switzerland Univ Zurich Zurich Switzerland CH-8092 rmat, CH-8092 Zurich, Switzerland
Titolo Testata:
JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING
fascicolo: 1, volume: 10, anno: 1999,
pagine: 41 - 51
SICI:
1053-1807(199907)10:1<41:AVSUAC>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN ABDOMINAL-AORTA; WALL SHEAR-STRESS; EDGE-DETECTION; MR; BALLOONS; IMAGES; MODELS;
Keywords:
flow quantification; image segmentation; aortic flow;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Boesiger, P Univ Zurich, Inst Biomed Engn & Med Informat, Gloriastr 35, CH-8092 Zurich, Switzerland Univ Zurich Gloriastr 35 Zurich Switzerland CH-8092 itzerland
Citazione:
S. Kozerke et al., "Automatic vessel segmentation using active contours in cine phase contrastflow measurements", J MAGN R I, 10(1), 1999, pp. 41-51

Abstract

The segmentation of images obtained by cine magnetic resonance (MR) phase contrast velocity mapping using manual or semi-automated methods is a time consuming and observer-dependent process that still hampers the use of now quantification in a clinical setting. A fully automatic segmentation methodbased on active contour model algorithms for defining vessel boundaries has been developed, For segmentation, the phase image, in addition to the magnitude image, is used to address image distortions frequently seen in the magnitude image of disturbed now fields. A modified definition for the active contour model is introduced to reduce the influence of missing or spurious edge information of the vessel wall. The method was evaluated on now phantom data and on in vivo images acquired in the ascending aorta of humans. Phantom experiments resulted in an error of 0.8% in assessing the luminal area of a now phantom equipped with an artificial heart valve. Blinded evaluation of the volume now rates from automatic vs. manual segmentation of gradient echo (FFE) phase contrast images obtained in vivo resulted in a mean difference of -0.9 +/- 3%. The mean difference from automatic vs. manual segmentation of images acquired with a hybrid phase contrast sequence (TFEPI) within a single breath-hold was -0.9 +/- 6%. J. Magn. Reson. Imaging 1999: 10:41-51. (C) 1999 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 19:17:04