Ryan R. Reeves et al. JCIN 2015;8:1197-1206 Comparison of the Radiation Exposure Between Each Dosimeter Location and Ambient Control Dosimeters Comparison of the means of the total exposure at the outside (A) and inside (B) locations to the mean of 3 ambient control dosimeters located outside of the catheterization laboratory. The exposure at the outside left and outside center locations was 177% and 117% higher than the ambient controls, respectively. The exposure at the outside right and each inside location was not significantly higher than the mean of the ambient controls. Ryan R. Reeves et al. JCIN 2015;8:1197-1206 2015 American College of Cardiology Foundation