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Titolo:
High-resolution MR venography at 3.0 Tesla
Autore:
Reichenbach, JR; Barth, M; Haacke, EM; Klarhofer, M; Kaiser, WA; Moser, E;
Indirizzi:
Univ Jena, Klinikum Friedrich Schiller, Abt Magnetresonanztomog, Inst Diagnost & Interventionell Radiol, D-07743 Jena, Germany Univ Jena Jena Germany D-07743 rventionell Radiol, D-07743 Jena, Germany Univ Vienna, Dept Radiodiagnost, Sect Osteol, Vienna, Austria Univ ViennaVienna Austria Radiodiagnost, Sect Osteol, Vienna, Austria Magnet Resonance Imaging Inst Biomed Res, St Louis, MO USA Magnet Resonance Imaging Inst Biomed Res St Louis MO USA t Louis, MO USA Univ Vienna, Inst Med Phys, Arbeitsgrp NMR, Vienna, Austria Univ Vienna Vienna Austria st Med Phys, Arbeitsgrp NMR, Vienna, Austria
Titolo Testata:
JOURNAL OF COMPUTER ASSISTED TOMOGRAPHY
fascicolo: 6, volume: 24, anno: 2000,
pagine: 949 - 957
SICI:
0363-8715(200011/12)24:6<949:HMVA3T>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
NMR RELAXATION-TIMES; GRADIENT-ECHO; BLOOD-OXYGENATION; FUNCTIONAL MRI; HUMAN BRAIN; 8 TESLA; SUSCEPTIBILITY; CONTRAST; IMAGE; FLOW;
Keywords:
magnetic resonance imaging; blood oxygen level dependent (BOLD); 3.0 Tesla; venogram; phase; susceptibility;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Reichenbach, JR Univ Jena, Klinikum Friedrich Schiller, Abt Magnetresonanztomog, Inst Diagnost & Interventionell Radiol, Philosophenweg 3, D-07743 Jena, Germany Univ Jena Philosophenweg 3 Jena Germany D-07743 , Germany
Citazione:
J.R. Reichenbach et al., "High-resolution MR venography at 3.0 Tesla", J COMPUT AS, 24(6), 2000, pp. 949-957

Abstract

Purpose: The aim of this study was to investigate the visualization of small venous vessels in the normal human brain at a field strength of 3 Tesla. Methods: T2*-weighted, three-dimensional gradient-echo images were acquired by exploiting the magnetic susceptibility difference between oxygenated and deoxygenated hemoglobin in the vasculature and microvasculature. The spatial resolution was 0.5 x 0.5 x 1 mm(3), and sequence parameters were varied to obtain good vessel delineation. Improved visibility of venous vessels was obtained by creating phase mask images from the magnetic resonance phase images and multiplying these by the magnitude images. Venograms were created by performing a minimum intensity projection over targeted volumes. Results: Highly detailed visualization of venous structures deep in the brain and in the superficial cortical areas were obtained without administration of an exogenous contrast agent; compared with similar studies performedat 1.5 T, the echo time could be reduced from typically 40-50 ms to 17-28 ms. Conclusion: Imaging at high-field strength offers the possibility of improved resolution and the delineation of smaller vessels compared with lower field strengths.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 23:04:29