01798nas a2200229   4500000000100000008004100001260001700042100002000059700001700079700001600096700001400112700001600126700001400142700001300156700001500169245007700184250001500261300001100276490000700287520122300294020005101517       2016                            d  c1694884751831 aThiagalingam A.1 aChoudhary P.1 aO'Rourke J.1 aKovoor P.1 aBlomster J.1 aHillis G.1 aAdler J.1 aChow Clara00aPatient Selection Essential for Computed Tomography Coronary Angiography  a2016/04/23  a206-120 v503 a<p>
Objective Computed tomography coronary angiography (CTCA) has become a commonly used imaging modality in patients with suspected anginal symptoms but also in asymptomatic populations. This practice has raised concerns due to potential high radiation exposure in terms of adequate benefit to risk profile. Design Demographics and CTCA scan details were collected from a consecutive series of 586 patients referred to a single community radiology practice for a CTCA. Results Of the 586 patients, 271 (46.2%) were women. Mean age was 58.3standard deviation (SD) 12.2, range 15-90 years, body mass index 28.6 SD 5.9 kg/m2 and heart rate 60 SD 10 beats per minute. Mean total radiation was 4.79 SD 3.45mSv (range 0.64 - 31.34). The mean radiation exposure in the lowest quartile of body mass index (BMI) and heart rate were 3.01 SD 1.84 mSv and 3.95 SD 2.72 mSv, compared to the highest 7.32 SD 3.51 mSv and 6.20 SD 4.38 mSv (p for trend &lt;0.0001 in both). Conclusion The radiation exposure in this consecutive series of patients is low in general but patient selection for CTCA imaging appear to be paramount. Patients with a high BMI and especially with high heart rate receive a higher dose of radiation.
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  a1651-2006 (Electronic)<br/>1401-7431 (Linking)