Measurement of dose distribution during combined IVR procedure using the film method

DOI Web Site 参考文献10件 オープンアクセス
  • Isobe Tomonori
    Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Fujibuchi Toshioh
    Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences
  • Takada Kenta
    Graduate School of Comprehensive Human Sciences, University of Tsukuba
  • Mori Saori
    Department of Radiology, Toranomon Hospital
  • Kato Hideyuki
    Department of Radiology, Chiba University Hospital
  • Kasahara Tetsuharu
    Department of Radiology, Chiba University Hospital
  • Sato Eisuke
    School of Allied Health Sciences, Kitasato University
  • Sakae Takeji
    Graduate School of Comprehensive Human Sciences, University of Tsukuba

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説明

Computed tomography (CT)-guided interventional radiology (IVR) for treatment hepatocellular carcinoma has the advantage of verifying three dimensional location of a tumor. However, it is considered that radiation exposure to patients is increasing with the utilization of CT. Therefore, to evaluate the cumulative absorbed dose of the skin by combined IVR procedure is very important. In this study, the dose distribution of the combined exposure of IVR-CT system has been evaluated using a film method. We selected low-sensitivity films (XV-2, Kodak) that conventionally used in radiotherapy to detect an absorbed dose. These films were placed at three cross-sectional places (posterior side, center, and anterior side) of slab phantom. Irradiation by fluoroscopy, digital subtraction angiography (DSA), and CT was performed with normal clinical parameters. The density of those films was converted to absorbed dose with the conversion curve. The maximum dose was 943.9 mGy on the posterior side with combined all procedures. This film method can be used to detect hot spots of the absorbed dose in combined IVR procedure.

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