RT Journal
A1 Torres FS, Crean AM, Paul N
T1 RAdiation dose-reduction program for cardiac computed tomography angiography
JF JAMA
JO JAMA
YR 2009
FD October 28
VO 302
IS 16
SP 1753
OP 1753
DO 10.1001/jama.2009.1512
UL http://dx.doi.org/10.1001/jama.2009.1512
AB 
To the Editor: The study by Dr Raff and colleagues1 demonstrated that the implementation of a radiation dose-reduction program for cardiac computed tomography angiography (CCTA) may be effective. In addition, the authors noted that there was no significant change in the median image quality assessment in the control compared with the follow-up period. However, Table 2 indicates an increase in the proportion of studies with poor or nondiagnostic scores from the control period to the follow-up period (4.2% vs 7.7%, respectively). Although the median score of image quality remained unchanged, the observation that approximately 1 in every 13 studies were nondiagnostic in the follow-up period is of concern.