Radiation damage (skin injury)
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Radiation-induced skin injuries can occur in both radiotherapy and fluoroscopic procedures such as interventional radiology. It is a type of deterministic effect.
Acute radiation doses above 2 Gy are known to result in erythema, permanent epilation will occur at 7 Gy and delayed skin necrosis transpires above doses of 12 Gy.
The damage is related to the absorbed dose of the area of skin receiving the most exposure in the examinations.
Methods to control skin dose
ensure the detector is as close to the patient as possible
tight collimation to the area of interest
minimize screening time
do no use a grid for smaller patients
when a substantial gap is between the patient and detector remove the grid as this utilizes the air gap technique
- 1. ICRP, 2000. Avoidance of Radiation Injuries from Medical Interventional Procedures. ICRP Publication 85. Ann. ICRP 30 (2).