What X ray procedures contribute most to individual patient dose and collective population dose?
CT and interventional procedures are high dose procedures in radiology and yield higher individual patient doses than other radiological procedures do. The patient dose in CT is an important issue for children as reports suggest that in some centres the exposure factors used for scanning children are the same as for adults. This problem is relatively lesser in interventional procedures as the machine, on the basis of the body thickness falling in the X ray beam, automatically adjusts factors in most modern equipment. CT scanning contributes most to collective dose from radiographic exposures due to the increasing use of this modality. It has been reported that 30% of adults and children have three or more CT scans [METTLER, F.A., et al., CT scanning: Patterns, use and dose, J. Radiol. Prot. 20 4 (2000) 353-359].
