MEASUREMENT OF THE EQUIVALENT INDIVIDUAL DOSES FOR PATIENTS IN ANGIOGRAPHY PROCEDURE AND INTERVENTIONAL RADIOLOGY WITH THERMOLUMINESCENT SYSTEMS

The aspects of radiation injuries in IR were highlighted and the increasing concern about the high skin dose levels in cardiology and other IR procedures, as it is very important a close monitoring in order to prevent stochastic effects and, in time, deterministic effects. The present study reports on investigations that we have performed to allow the calculation of the individual penetrant radiation dose, Hp(10) in interventional radiology and also the important results in determining the homogeneity of the radiation flux. In order to determine the uniformity of large area beams with a better precision, thermoluminescent matrices of 8 x 12cm size, containing arrays of chips, uniformly distributed in each row and column of the matrix, were used. From the measurements we obtained accurate data of the dose received by patients in different areas of the body. Measurement method using TLD's is net superior to the measurement with Dap-meter. Due to the potential for stochastic and deterministic effects existing in interventional radiology, dosimetry information is required to make the interventionalist aware of the potential for such effects.