Radiation dose and risk in children undergoing cardiac interventions performed using flat detector angiography systems
The purpose of the study was to measure radiation doses and estimate risk from various beam
projections in children undergoing cardiac interventions. The dose area product (DAP) was measured
for eleven patent ductus arteriosus device closures (PDA), four atrial septal defect device closures
(ASD), and three balloon pulmonary valvuloplasty (BPV) interventions performed using a flat detector
system. The total mean DAPs for PDA, ASD and BPV were 1.9 Gycm 2 , 9.8 Gycm 2 and 6.2 Gycm 2
respectively. The fluoroscopic kerma dose rates increased by 10%, 33% and 92% when changing the
projection from posterior –anterior to lateral projection for PDA interventions among infants,5 yrs respectively. The effective dose (ED) and organ doses were estimated from DAP using Monte
Carlo software. Lungs received the highest organ dose of 7.4 mGy (PDA), 20.7 mGy (ASD) and 17.3 mGy
(BPV) compared to other organs. The mean EDs from PDA, ASD and BPV were 2....
Source: Journal of Radiological Protection - Category: Physics Authors: Anna Varghese, A Devi, Paul V George and Roshan S Livingstone Source Type: research