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Titolo:
ECG-gated reconstructed multi-detector row CT coronary angiography: Effectof varying trigger delay on image quality
Autore:
Hong, C; Becker, CR; Huber, A; Schoepf, UJ; Ohnesorge, B; Knez, A; Bruning, R; Reiser, MF;
Indirizzi:
Univ Munich, Klinikum Grosshadern, Inst Clin Radiol, D-81377 Munich, Germany Univ Munich Munich Germany D-81377 Clin Radiol, D-81377 Munich, Germany Univ Munich, Klinikum Grosshadern, Div Cardiol, D-81377 Munich, Germany Univ Munich Munich Germany D-81377 Div Cardiol, D-81377 Munich, Germany Siemens Med Syst Inc, Forchheim, Germany Siemens Med Syst Inc Forchheim Germany Med Syst Inc, Forchheim, Germany Tongji Med Univ, Dept Radiol, Tongji, Peoples R China Tongji Med Univ Tongji Peoples R China Radiol, Tongji, Peoples R China
Titolo Testata:
RADIOLOGY
fascicolo: 3, volume: 220, anno: 2001,
pagine: 712 - 717
SICI:
0033-8419(200109)220:3<712:ERMRCC>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
BEAM COMPUTED-TOMOGRAPHY; ELECTRON-BEAM; ARTERY CALCIFICATION; SPIRAL CT; MOTION; QUANTIFICATION; STENOSES;
Keywords:
coronary vessels, CT; heart, CT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Becker, CR Univ Munich, Klinikum Grosshadern, Inst Clin Radiol, Marchioninistr 15, D-81377 Munich, Germany Univ Munich Marchioninistr 15 Munich Germany D-81377 , Germany
Citazione:
C. Hong et al., "ECG-gated reconstructed multi-detector row CT coronary angiography: Effectof varying trigger delay on image quality", RADIOLOGY, 220(3), 2001, pp. 712-717

Abstract

PURPOSE: To evaluate the effectiveness of electrocardiographically (ECG)-gated retrospective image reconstruction for multi-detector row computed tomographic (CT) coronary angiography in reducing cardiac motion artifacts andto evaluate the influence of heart rate on cardiac image quality. MATERIALS AND METHODS: Sixty-five patients with different heart rates underwent coronary CT angiography. Raw helical CT data and ECG tracings were combined to retrospectively reconstruct at the defined consecutive z positionwith a temporal resolution of 250 msec per section. The starting points ofthe reconstruction were chosen between 30% and 80% of the R-R intervals. The relationships between heart rate, trigger delay, and image quality were analyzed. RESULTS: Optimal image quality was achieved with a 50% trigger delay for the right coronary artery and 60% for the left circumflex coronary artery. Optimal image quality for the left anterior descending coronary artery was equally obtained at 50% and 60% triggering. A significant negative correlation was observed between heart rate and image quality (P < .05). The best image quality was achieved when the heart rate was less than 74.5 beats per minute. CONCLUSION: To achieve high image quality, the heart rate should be sufficiently slow. Selection of appropriate trigger delays and a decreasing heartrate are effective to reduce cardiac motion artifacts.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 05:24:27