engleski

Double dosimetry in interventional radiology - practice, evaluation and recommendations

Interventional radiological procedures can lead to significant radiation doses to patients and to staff members. In order to evaluate the personal doses with respect to the regulatory dose limits, doses measured by dosimeters have to be converted to effective doses (E). Measurement of personal dose equivalent Hp(10) using a single unshielded dosimeter above the lead apron can lead to significant overestimation of the effective dose, while the measurement with dosimeter under the apron can lead to underestimation. To improve the accuracy, measurements with two dosimeters, one above and the other under the apron have been suggested (“ double dosimetry” ). The International Commission on Radiological Protection (ICRP Publication 85, 2000) has recommended that interventional radiology departments should develop a policy that staff wear two dosimeters. The aim of this study was to review the double dosimetry practices and algorithms for the calculation of effective dose in high dose interventional radiology procedures. Based on an extensive literature search, the most recent algorithms developed for the calculation of effective dose from dosimeter readings have been compared for a few practical interventional procedures. Recommendations on the practices and algorithms are given on the basis of the results. This work has been carried out by Working Group 9 (Radiation protection dosimetry of medical staff) of the CONRAD project, which is a Coordination Action supported by the European Commission within its 6th Framework Program.

oInterventional radiology; double dsimetry; radiation protection

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