PURPOSE: To evaluate reconstruction intervals and image quality in dual-source computed tomography (DSCT) coronary angiography for optimal placement of the ECG-pulsing window. MATERIALS AND METHODS: DSCT coronary angiography was performed in 60 patients. Thirteen datasets were reconstructed in 5% increments from 20-80%. Two readers independently assessed image quality of each segment in each percentage-interval, using scores ranging from 1 (no motion artifacts) to 4 (nonevaluable). RESULTS: Mean heart rate (HR) was 69.0 +/- 18.9 beats per minute (bpm) (range, 35-117 bpm). Diagnostic image quality (scores 1-3) was found in 97.8% of all segments (763 of 780). The 70% RR-interval provided best image quality in all patients and all HRs. The narrowest reconstruction window providing diagnostic image quality was 60-70% for HR <60 bpm, 60-80% for 60-70 bpm, 55-80% for 70-80 bpm, and 30-80% for HR >80 bpm. CONCLUSIONS: DSCT coronary angiography provides best image quality for various HRs at 70%. The ECG-pulsing window can be adapted according to the HR while maintaining diagnostic image quality.
PURPOSE: To evaluate reconstruction intervals and image quality in dual-source computed tomography (DSCT) coronary angiography for optimal placement of the ECG-pulsing window. MATERIALS AND METHODS: DSCT coronary angiography was performed in 60 patients. Thirteen datasets were reconstructed in 5% increments from 20-80%. Two readers independently assessed image quality of each segment in each percentage-interval, using scores ranging from 1 (no motion artifacts) to 4 (nonevaluable). RESULTS: Mean heart rate (HR) was 69.0 +/- 18.9 beats per minute (bpm) (range, 35-117 bpm). Diagnostic image quality (scores 1-3) was found in 97.8% of all segments (763 of 780). The 70% RR-interval provided best image quality in all patients and all HRs. The narrowest reconstruction window providing diagnostic image quality was 60-70% for HR <60 bpm, 60-80% for 60-70 bpm, 55-80% for 70-80 bpm, and 30-80% for HR >80 bpm. CONCLUSIONS: DSCT coronary angiography provides best image quality for various HRs at 70%. The ECG-pulsing window can be adapted according to the HR while maintaining diagnostic image quality.
Authors: Brian P Shapiro; Phillip M Young; Birgit Kantor; Yeon Hyeon Choe; Cynthia H McCollough; Thomas C Gerber Journal: Curr Cardiol Rep Date: 2010-01 Impact factor: 2.931
Authors: Stefan C Saur; Hatem Alkadhi; Paul Stolzmann; Stephan Baumüller; Sebastian Leschka; Hans Scheffel; Lotus Desbiolles; Thomas J Fuchs; Gábor Székely; Philippe C Cattin Journal: Eur Radiol Date: 2010-01-30 Impact factor: 5.315
Authors: Cormac Farrelly; Amir Davarpanah; Aoife N Keeling; John Sheehan; Ann Ragin; Vahid Yaghmai; James C Carr Journal: Int J Cardiovasc Imaging Date: 2010-11-03 Impact factor: 2.357
Authors: M A Kuefner; S Grudzenski; J Hamann; S Achenbach; Michael Lell; K Anders; S A Schwab; L Häberle; M Löbrich; M Uder Journal: Eur Radiol Date: 2010-07-13 Impact factor: 5.315