| CHENG Yu-xi,YU Peng,WEI Ke-dao,et al.Measurement and estimation of maximum skin dose to the patient for different interventional procedures[J].Chinese Journal of Radiological Medicine and Protection,2005,25(6):543-545 |
| Measurement and estimation of maximum skin dose to the patient for different interventional procedures |
| Received:June 07, 2008 |
| DOI： |
| KeyWords:Interventional radiology Angiography Medical exposure Maximum skin dose |
| FundProject:首都医学发展科研基金资助项目(20023026) |
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| Abstract:: |
| Objective To determine the dose distribution and maximum skin dose to the patient for four interventional procedures: coronary angiography (CA), hepatic angiography(HA),radiofrequency ablation (RF) and cerebral angiography(CAG),and to estimate the definitive effect of radiation on skin. Methods Skin dose was measured using LiF: Mg,Cu,P TLD chips. A total of 9 measuring points were chosen on the back of the patient with two TLDs placed at each point, for CA,HA and RF interventional procedures,whereas two TLDs were placed on one point each at the postero-anterior(PA) and lateral side (LAT) respectively, during the CAG procedure. Results The results revealed that the maximum skin dose to the patient was 1683.91 mGy for the HA procedure with a mean value of 607.29 mGy. The maximum skin dose at the PA point was 959.3 mGy for the CAG with a mean value of 418.79 mGy; While the maximum and the mean dises at the LAT point were 704 mGy and 191.52 mGy, respectively. For the RF procedure the maximum dose was 853.82 mGy and the mean was 219.67 mGy. For the CA procedure the maximum dose was 456.1 mGy and the mean was 227.63 mGy. Conclusion All the measured dose values in this study are estimated ones which could not provide the accurate maximum value because it is difficult to measure using a great deal of TLDs. On the other hand, the small area of skin exposed to high dose could be missed as the distribution of the dose is successive. |
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