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Titolo:
TAG CONTRAST IN BREATH-HOLD CINE CARDIAC MRI
Autore:
REEDER SB; MCVEIGH ER;
Indirizzi:
JOHNS HOPKINS UNIV,SCH MED,DEPT BIOMED ENGN,MED IMAGING LAB,407 TRAYLOR BLDG,720 RUTLAND AVE BALTIMORE MD 21205 JOHNS HOPKINS UNIV,SCH MED,DEPT BIOMED ENGN,MED IMAGING LAB BALTIMOREMD 21205 JOHNS HOPKINS UNIV,SCH MED,DEPT RADIOL,MED IMAGING LAB BALTIMORE MD 21205
Titolo Testata:
Magnetic resonance in medicine
fascicolo: 5, volume: 31, anno: 1994,
pagine: 521 - 525
SICI:
0740-3194(1994)31:5<521:TCIBCC>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOTION; SEQUENCE; HEART;
Keywords:
MRI; TAGGING; OPTIMIZATION; FAST-SCAN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
S.B. Reeder e E.R. Mcveigh, "TAG CONTRAST IN BREATH-HOLD CINE CARDIAC MRI", Magnetic resonance in medicine, 31(5), 1994, pp. 521-525

Abstract

Contrast between tagged and nontagged myocardium was investigated using rapid gradient echo segmented k-space CINE MRI. The transient behavior of magnetization was measured in stationary and moving phantoms using gradient recalled acquisition in steady-state GRASS and spoiled GRASS (SPGR) sequences with TR approximate to 7 ms and TE approximate to2.5 ms. Bloch equation simulations were used to compute theoretical results. Understanding the transient behavior of magnetization is important because tags only persist in the myocardium during the nonequilibrium transition to steady state. The transition to steady state for both SPGR and GRASS is reproducible after one heartbeat, and including unprocessed data from the first heartbeat leads to image artifacts. In a moving phantom, simulations and experimental results showed that GRASS and SPGR are essentially equivalent. Tag-tissue contrast in SPGR was very sensitive to imaging tip angle. The optimum tip angle for the scanning parameters used in this study was 11 degrees.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 07:01:11