Evolution of Coronary Computed Tomography Radiation Dose Reduction at a Tertiary Referral Center - 25/07/12
, Leif-Christopher Engel, MD a, Gyöngyi Petra Major, MD a, Alexander Goehler, MD, MPH, MSc, PhD a, Tust Techasith, MD a, Daniel Verdini, MD a, Synho Do, PhD, BSc, MSc a, Bob Liu, PhD b, Xinhua Li, PhD b, Michiel Sala, MD a, Mi Sung Kim, MD b, Ron Blankstein, MD c, Priyanka Prakash, MD b, Manavjot S. Sidhu, MD a, Erin Corsini a, Dahlia Banerji, MD a, David Wu a, Suhny Abbara, MD a, Quynh Truong, MD, MPH a, Thomas J. Brady, MD a, Udo Hoffmann, MD, MPH a, Manudeep Kalra, MD b
Requests for reprints should be addressed to Brian Burns Ghoshhajra, MD, MBA, Cardiac MR PET CT Program, Department of Radiology, Massachusetts General Hospital, 165 Cambridge Street, Suite 400, Boston, MA 02114Abstract |
Purpose |
We aimed to assess the temporal change in radiation doses from coronary computed tomography angiography (CCTA) during a 6-year period. High CCTA radiation doses have been reduced by multiple technologies that, if used appropriately, can decrease exposures significantly.
Methods |
A total of 1277 examinations performed from 2005 to 2010 were included. Univariate and multivariable regression analysis of patient- and scan-related variables was performed with estimated radiation dose as the main outcome measure.
Results |
Median doses decreased by 74.8% (P<.001), from 13.1 millisieverts (mSv) (interquartile range 9.3-14.7) in period 1 to 3.3 mSv (1.8-6.7) in period 4. Factors associated with greatest dose reductions (P<.001) were all most frequently applied in period 4: axial-sequential acquisition (univariate: −8.0 mSv [−9.7 to −7.9]), high-pitch helical acquisition (univariate: −8.8 mSv [−9.3 to −7.9]), reduced tube voltage (100 vs 120 kV) (univariate: −6.4 mSv [−7.4 to −5.4]), and use of automatic exposure control (univariate: −5.3 mSv [−6.2 to −4.4]).
Conclusions |
CCTA radiation doses were reduced 74.8% through increasing use of dose-saving measures and evolving scanner technology.
El texto completo de este artículo está disponible en PDF.Keywords : Cardiac computed tomography, Coronary artery disease, Dose-savings methods, Radiation dose, Scan protocols
Esquema
| Robert G. Stern, MD, Section Editor |
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| Funding: Drs Ghoshhajra, Blankstein, and Goehler received funding from National Institutes of Health 1T32 HL076136. Dr Ghoshhajra received funding from Radiological Society of North America RF0908. Partners Healthcare Institutional Review Board specifically approved the waiver of consent for this study. |
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| Conflict of Interest: None. |
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| Authorship: All authors had access to the data and played a role in writing this manuscript. |
Vol 125 - N° 8
P. 764-772 - août 2012 Regresar al número
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