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Titolo:
Optimal electrocardiographically triggered phase for reducing motion artifact at electron-beam CT in the coronary artery
Autore:
He, S; Dai, RP; Chen, Y; Bai, H;
Indirizzi:
Chinese Acad Med Sci, Peking Union Med Coll, Cardiovasc Inst, Dept Radiol,Beijing 100037, Peoples R China Chinese Acad Med Sci Beijing Peoples R China 100037 037, Peoples R China Chinese Acad Med Sci, Fuwai Hosp, Peking Union Med Coll, Beijing 100037, Peoples R China Chinese Acad Med Sci Beijing Peoples R China 100037 037, Peoples R China
Titolo Testata:
ACADEMIC RADIOLOGY
fascicolo: 1, volume: 8, anno: 2001,
pagine: 48 - 56
SICI:
1076-6332(200101)8:1<48:OETPFR>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
MR-ANGIOGRAPHY; COMPUTED-TOMOGRAPHY; BREATH-HOLD; CARDIAC MOTION; STENOSES; RECONSTRUCTIONS; QUANTIFICATION; ACQUISITION;
Keywords:
computed tomography (CT), artifact; computed tomography (CT), electron beam; coronary vessels, CT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: He, S Chinese Acad Med Sci, Peking Union Med Coll, Cardiovasc Inst, Dept Radiol,167 N Lishi Rd, Beijing 100037, Peoples R China Chinese Acad Med Sci 167 N Lishi Rd Beijing Peoples R China 100037
Citazione:
S. He et al., "Optimal electrocardiographically triggered phase for reducing motion artifact at electron-beam CT in the coronary artery", ACAD RADIOL, 8(1), 2001, pp. 48-56

Abstract

Rationale and Objectives. The authors performed this study to (a) investigate coronary movement with electron-beam computed tomography (CT) and (b) find the optimal electrocardiographic (ECG) triggering phase for eliminatingmotion artifact. Materials and Methods. One hundred fifty-one patients without arrhythmia were examined with electron-beam CT. First, movie scans were obtained to create displacement and velocity graphs of coronary artery movement. Then, a volume scan with an exposure time of 100 msec was obtained with various ECG trigger settings. Results. Movement patterns of coronary arteries varied with heart rate. Optimal triggering phase was before atrial systole (near 71% of the R-R interval) when heart rate was slower than 68 beats per minute and at ventricularend systole when heart rate was fast. Rate of severe motion artifacts decreased from 43% to 0% when triggering was altered from 80% of the R-R interval to the individual optimal value. Experimental values of the optimal phase at different heart rates were derived, and severe motion artifact was only 3.0% with these values. Conclusion, ECG triggering set according to the heart rate enables a greatreduction in motion artifacts at electron-beam CT with a 100-msec exposuretime. The results may have implications for magnetic resonance imaging of the coronary arte rv.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/10/20 alle ore 12:34:14