Diagnostic performance of 320-detector CT coronary angiography in patients with atrial fibrillation: preliminary results

Abstract

320-detector CTCA is feasible and accurate in excluding CAD in patients with AF.

The effect of heart rhythm on patient radiation dose with dual-source cardiac computed tomography

“…[18][19][20][21] However, the effect of heart rhythm during scan acquisition on radiation dose has not been previously examined. Although prior studies have attempted to correlate heart rate or heart rate variability to radiation exposure, 16 this study extends prior observations through an examination of the relationship between heart rhythm and radiation exposure.…”

Coronary computed tomography angiography during arrhythmia: Radiation dose reduction with prospectively ECG-triggered axial and retrospectively ECG-gated helical 128-slice dual-source CT

“…However, the average effective dose administered was 13.0 mSv, which was similar to our retrospectively gated DSCT (12.6 mSv) but exceeded our prospectively triggered DSCT by a factor of 3 (4.1 mSv). 22 Given that the sample size in both studies was small, we propose that the radiation exposure and diagnostic accuracy of 320-MDCT versus prospectively ECG-triggered axial 128-slice DSCT angiography with advanced arrhythmia rejection algorithm in patients with arrhythmia requires further evaluation.…”

CT coronary angiography in atrial fibrillation: a comparison of radiation dose and diagnostic confidence with retrospective gatingvsprospective gating with systolic acquisition

“…16 This either has to be accurately chosen or else the entire cardiac cycle must be imaged, which adds to the X-ray exposure time and therefore radiation dose. 17 The ability to dose-modulate for more than one target phase is being tested, 18 but again the phases must be chosen prospectively to benefit maximally from radiation-reducing techniques. The improved temporal resolution of dual-source scanners should also be of benefit when imaging patients with a tachyarrhythmia, 19 and the diagnostic accuracy of these scanners appears promising when compared with invasive coronary angiography, even without attempts at heart rate control, 20 but results are variable, 21 radiation dose remains a significant issue, 20,22 and the technology has not always been compared with conventional scanners.…”