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Titolo:
IN-VIVO MEASUREMENT OF T-ASTERISK(2) AND FIELD INHOMOGENEITY MAPS IN THE HUMAN HEART AT 1.5 T
Autore:
REEDER SB; FARANESH AZ; BOXERMAN JL; MCVEIGH ER;
Indirizzi:
JOHNS HOPKINS UNIV,SCH MED,DEPT BIOMED ENGN,407 TRAYLOR BLDG,720 RUTLAND AVE BALTIMORE MD 21205 JOHNS HOPKINS UNIV,SCH MED,DEPT BIOMED ENGN BALTIMORE MD 21205
Titolo Testata:
Magnetic resonance in medicine
fascicolo: 6, volume: 39, anno: 1998,
pagine: 988 - 998
SICI:
0740-3194(1998)39:6<988:IMOTAF>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
BLOOD OXYGENATION; SUSCEPTIBILITY CONTRAST; IN-VIVO; ECHO; FLOW; MYOCARDIUM; PERFUSION;
Keywords:
CARDIAC IMAGING; FIELD INHOMOGENEITIES; ECHO PLANAR IMAGING; RELAXATION PARAMETERS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
S.B. Reeder et al., "IN-VIVO MEASUREMENT OF T-ASTERISK(2) AND FIELD INHOMOGENEITY MAPS IN THE HUMAN HEART AT 1.5 T", Magnetic resonance in medicine, 39(6), 1998, pp. 988-998

Abstract

Cardiac echo-planar imaging suffers invariably from regions of severedistortion and T(2) decay in the myocardium. The purpose of this work was to perform local measurements of T(2) and field inhomogeneitiesin the myocardium and to identify the sources of focal signal loss and distortion. Field inhomogeneity maps and T(2) were measured in fivenormal volunteers in short-axis slices spanning from base to apex. Itwas found that T(2) ranged from 26 ms (SD = 7 ms, n = 5) to 41 ms (SD = 11 ms, n = 5) over most of the heart, and peak-to-peak field inhomogeneity differences were 71 Hz (SD = 14 Hz, n = 5). In all hearts, regions of severe signal loss were consistently adjacent to the posterior vein of the left ventricle; T(2) in these regions was 12 ms (SD = 2ms, n = 5), and the difference in resonance frequency with the surrounding myocardium was 70-100 Hz. These effects may be caused by increased magnetic susceptibility from deoxygenated blood in these veins.

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Documento generato il 27/11/20 alle ore 13:28:27