1. Evolution of coronary computed tomography radiation dose reduction at a tertiary referral center.
- Author
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Ghoshhajra BB, Engel LC, Major GP, Goehler A, Techasith T, Verdini D, Do S, Liu B, Li X, Sala M, Kim MS, Blankstein R, Prakash P, Sidhu MS, Corsini E, Banerji D, Wu D, Abbara S, Truong Q, Brady TJ, Hoffmann U, and Kalra M
- Subjects
- Adult, Age Factors, Aged, Algorithms, Body Mass Index, Cardiac-Gated Imaging Techniques instrumentation, Cardiac-Gated Imaging Techniques trends, Coronary Angiography instrumentation, Dose-Response Relationship, Radiation, Heart Rate, Humans, Middle Aged, Multidetector Computed Tomography instrumentation, Radiation Injuries prevention & control, Radiation Protection instrumentation, United States, Coronary Angiography trends, Multidetector Computed Tomography trends, Radiation Dosage
- Abstract
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., (Copyright © 2012 Elsevier Inc. All rights reserved.)
- Published
- 2012
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