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Analysis of radiation exposure in patients undergoing neurointerventional radiology by actual measurement versus estimation: effect of medical exposure on biological
analysis
1 Department of Radiological Health Science, Institute of Industrial Ecological Sciences,
University of Occupational and Environmental Health, Japan, Kitakyushu, Fukuoka, Japan.
2 Department of Radiology, Shinkomonji Hospital, Kitakyushu, Fukuoka, Japan.
3 Department of Radiological Technology, Kawasaki Medical School Hospital, Kurashiki,
Okayama, Japan.
Takashi Moritake 1*, Koichi Morota 1, 2, Go Hitomi 3 (Accepted for publication 7 December 2017)
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1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu 807-8555, Japan
TEL: +81-93-691-7549, Fax: 093-691-7552, E-mail: [email protected]
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Recent progress in angiographic technology has provided more benefits for patients undergoing minimally invasive techniques than those undergoing surgery. However, upgrading of the procedure has been necessary because of extensions of the fluoroscopy time and number of exposures, and resultant adverse effects such as radiation dermatitis have recently been reported. The level of radiation exposure in patients is voluntary and intentional for diagnosis or medical treatment. Limiting the dose would adversely affect the convenience of the procedure. Improper administration results in a large margin of radiation exposure among medical facilities, even those using the same testing or treatment protocols. Adverse reactions may result in avoidance of the procedure.
Absorption of energy by the patient’s skin surface reaches its maximum during neurointerventional diagnostic X- ray examinations. Therefore, it is important to know the area of the skin surface irradiated and the maximum entrance skin dose to avoid tissue reactions. Actual measurement using a dosimeter and estimation of the dose based on the shooting conditions are the two methods used to measure the radiation dose. In particular, using the RADIREC system of the former patient exposure dose captures lens dose accurately, we could show the future possibility of the data that is useful to explain the cataract mechanism from radioactive rays by accumulating the clinical data. We are developing a technology with which to easily estimate the maximum entrance skin dose using DICOM-RDSR as the estimation method from the latter shooting condition. We hope that this technology will further clarify the dose response and thus help to avoid tissue reactions.
Key words: Medical exposure, Interventional radiology (IVR), RADIREC, Digital Imaging and Communication in Medicine (DICOM), Radiation Dose Structured Report (RDSR)
