TY - JOUR
T1 - Evolution of coronary computed tomography radiation dose reduction at a tertiary referral center
AU - Ghoshhajra, Brian Burns
AU - Engel, Leif Christopher
AU - Major, Gyöngyi Petra
AU - Goehler, Alexander
AU - Techasith, Tust
AU - Verdini, Daniel
AU - Do, Synho
AU - Liu, Bob
AU - Li, Xinhua
AU - Sala, Michiel
AU - Kim, Mi Sung
AU - Blankstein, Ron
AU - Prakash, Priyanka
AU - Sidhu, Manavjot S.
AU - Corsini, Erin
AU - Banerji, Dahlia
AU - Wu, David
AU - Abbara, Suhny
AU - Truong, Quynh
AU - Brady, Thomas J.
AU - Hoffmann, Udo
AU - Kalra, Manudeep
PY - 2012/8
Y1 - 2012/8
N2 - 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.
AB - 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.
KW - Cardiac computed tomography
KW - Coronary artery disease
KW - Dose-savings methods
KW - Radiation dose
KW - Scan protocols
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U2 - 10.1016/j.amjmed.2011.10.036
DO - 10.1016/j.amjmed.2011.10.036
M3 - Article
C2 - 22703931
AN - SCOPUS:84864281858
SN - 0002-9343
VL - 125
SP - 764
EP - 772
JO - American Journal of Medicine
JF - American Journal of Medicine
IS - 8
ER -