TITLE:
Temporal Trends in Radiation Dose Associated with Coronary Computed Tomography Angiography
AUTHORS:
Paolo Marraccini, Alessandro Mazzarisi, Clara Carpeggiani, Mathis Schluter, Marco Brambilla, Massimiliano Bianchi, Lorenzo Faggioni, Giuseppe Coppini, Carlo Bartolozzi, Eugenio Picano
KEYWORDS:
Ischemic Heart Disease; X Ray; Cardiac Computed Tomography; Cardiovascular Imaging; Radiation Dosing
JOURNAL NAME:
Open Journal of Radiology,
Vol.4 No.1,
March
5,
2014
ABSTRACT: Background: In 2010, the International Atomic
Energy Agency launched the “3A’s campaign” as an effective tool for primary
cancer prevention. In 2011, the American Association of Physicists in Medicine
recommended the size specific dose estimate (SSDE). Objectives: To audit doses
of Coronary CT Angiography (Coronary CTA) in tertiary care referral center.
Methods: We reviewed 998 consecutive Coronary CTA (from 2007 to 2012). Doses
(CTDIvol mGy), DLP (mGy*cm), effective dose (DLP*0.014, mSv) were on-line
archived. SSDE was estimated retrospectively. Appropriateness score was
evaluated for exams performed from the 2010. Results: Overall median dose per
Coronary CTA was 49.7 mGy for CTDIvol, 55.5 mGy for SSDE, 994.96
mGy*cm for DLP, 13.9 mSv for effective dose. Median DLP decreased over time
(1452.94 in 2007, 1605.56 in 2008, 1113.49 in 2009, 759.99 in 2010, 448.61 in
2011 and 497.88 mGy*cm in 2012, p 1 (88%) CTDIvol underestimated SSDE (48.49 vs
57.19 mGy), whilst in patients with SDF