Objective: To assess the image quality of coronary CT angiography (CCTA) for suspected acute coronary syndrome (ACS) outside office hours. Methods: Patients with symptoms suggestive of an ACS underwent CCTA at the emergency department 24 hours, 7 days a week. A total of 118 patients, of whom 89 (75 %) presented during office hours (weekdays between 07:00 and 17:00) and 29 (25 %) outside office hours (weekdays between 17:00 and 07:00, weekends and holidays) underwent CCTA. Image quality was evaluated per coronary segment by two experienced readers and graded on an ordinal scale ranging from 1 to 3. Results: There were no significant differences in acquisition parameters, beta-blocker administration or heart rate between patients presenting during office hours and outside office hours. The median quality score per patient was 30.5 [interquartile range 26.0–33.5] for patients presenting during office hours in comparison to 27.5 [19.75–32.0] for patients presenting outside office hours (p=0.043). The number of non-evaluable segments was lower for patients presenting during office hours (0 [0–1.0] vs. 1.0 [0–4.0], p=0.009). Conclusion: Image quality of CCTA outside office hours in the diagnosis of suspected ACS is diminished. Key Points: • Quality scores were higher for coronary-CTA during office hours.• There were no differences in acquisition parameters.• There was a non-significant trend towards higher heart rates outside office hours.• Coronary-CTA on the ED requires state-of-the-art scanner technology and sufficiently trained staff.• Coronary-CTA on the ED needs preparation time and optimisation of the procedure.

Acute coronary syndrome, Coronary artery disease, Coronary CT angiography, Emergency department, Image quality
dx.doi.org/10.1007/s00330-017-5082-7, hdl.handle.net/1765/103526
European Radiology: journal of the European Congress of Radiology
Erasmus MC: University Medical Center Rotterdam

Lubbers, M.M, Dedic, A, Kurata, A, Dijkshoorn, M.L, Schaap, J, Lammers, J. (Jeroen), … Nieman, K. (2017). Round-the-clock performance of coronary CT angiography for suspected acute coronary syndrome: Results from the BEACON trial. European Radiology: journal of the European Congress of Radiology, 1–7. doi:10.1007/s00330-017-5082-7