慢性血栓塞栓性肺高血圧症に対するバルーン肺動脈拡張術における術者と医療スタッフの被ばく低減法

• Published in: Nippon Hōshasen Gijutsu Gakkai zasshi Vol. 73; no. 10; pp. 1045 - 1054
• Main Authors: 小川, 和久, 佐藤, 楓, 宮崎, 仁志, 梅津, 芳幸, 赤嶺, 寛地
• Format: Journal Article
• Language: Japanese
• Published: Kyoto 公益社団法人 日本放射線技術学会 01.01.2017; Japan Science and Technology Agency
• Subjects: ambient equivalent dose; Angiography; Angioplasty; balloon pulmonary angioplasty (BPA); Balloon treatment; chronic thromboembolic pulmonary hypertension (CTEPH); Equivalence; Exposure; Fluoroscopy; Heart diseases; Hypertension; Medical personnel; Pulmonary hypertension; Radiation dosage; Radiation effects; radiation exposure; Radiation protection; radiation protective device; Reduction; Thromboembolism
• ISSN: 0369-4305; 1881-4883
• DOI: 10.6009/jjrt.2017_JSRT_73.10.1045

The purpose of this study is to investigate a reduction method of radiation exposure for operator and medical staff in balloon pulmonary angioplasty (BPA) for chronic thromboembolic pulmonary hypertension (CTEPH). We devised a new radiation protection, which is U-shaped acrylic supporting table with 0.35 mmPb unleaded radiation protection sheet. A human phantom was put on the bed of cardiac angiography system [C-arm angulation: posteroanterior (PA), L-arm angulation: left anterior oblique (LAO) 60°]. The ambient equivalent dose rate was measured under fluoroscopy with and without three radiation protections: U-shaped acrylic supporting table with 0.35 mmPb unleaded radiation protection sheet, radiation protection for the lower body, and radiation protection for the upper body. With the three radiation protections, the ambient equivalent dose rate was decreased more than 99% at the height of 100 cm above the floor at the operator position (PA: from 186.2 μSv/h to 0.5 μSv/h, LAO 60°: from 350.4 μSv/h to 1.6 μSv/h). Ambient equivalent dose rate at the other points are also decreased effectively. The devised dose reduction method can reduce operator and medical staff radiation exposure effectively and be set up without interference for BPA procedure.