, Volume 28, Issue 8, pp 2121-2124
Date: 09 Feb 2012

Evidence for prospective ECG-triggering coronary CT angiography in routine practice

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Over the past decade, cardiac multidetector row CT (MDCT) has evolved, and the technology is poised to potentially alter the indications for diagnostic invasive coronary angiography (ICA) [110]. However, ionizing radiation concerns as related to increased cancer risks, initially applied to other organ systems [11, 12], have been translated to coronary CT angiography (CTA) and compared to ICA [1317], while the dose dependent relation between low-radiation-dose exposure from cardiac procedures and subsequent risk of cancer has been reported [18].

Several strategies including ECG-triggered current modulation [19], lower tube voltage settings [13, 17, 20], and prospective ECG-triggering [21, 22] have progressively lowered patient radiation doses. One of the most applied approaches is prospective ECG-triggering [23, 24], where the exposure is confined to a predefined fraction of the time points of the cardiac cycle, rather than over the entire cycle. Depending on the details of the acquisi ...