カワムラ　ヒデマサ   KAWAMURA Hidemasa   河村　英将    所属   埼玉医科大学  医学部 総合医療センター　放射線科(画像診断・核医学科、放射線腫瘍科)    職種   教授
論文種別	学術雑誌(原著)
言語種別	英語
査読の有無	査読なし
表題	Pilot study of aerosols visualized and evaluated in a radiotherapy room.
掲載誌名	正式名：Journal of radiation research
掲載区分	国外
巻・号・頁	64(2),420-427頁
著者・共著者	Atsushi Musha,Nobuteru Kubo,Hidemasa Kawamura,Naoko Okano,Kunio Yanagisawa,Kazuaki Sugawara,Ryuta Okamoto,Kozo Takahashi,Hideki Kawabata,Tatsuya Ohno
発行年月	2023/03/23
概要	Health care institutions provide prevention strategies for coronavirus disease 2019 and non-infectious disease care. We investigated the characteristics of patient contamination in a radiotherapy room by examining the trajectory and number of airborne particles in the air when talking and coughing occurred and clarified the actual state of contamination in this closed space. Aerosols were visualized and evaluated in the vertical height and head-to-tail width directions when the participant was lying on the radiotherapy tabletop. Aerosol reach was significantly greater for loud voice and coughing both at vertical height and the head-to-tail width direction. The size and number of particles around the radiotherapy tabletop were also visualized and evaluated in the radiotherapy room. The radiotherapy staff who were in the presence of the participant sometimes had many particles adhering to their facial area; particle adhesion to the staff was dominated by small size particles. Particle adherence to the irradiation device surface near the ceiling had particles larger than 1 mm. Tabletop particles tended to have a wider size range, including bigger sizes and a larger count compared to the surrounding floor. The 0.7-m radius distance from the participant's mouth tended to be highly contaminated, and the smaller the particle size, the farther it reached. The capacity to estimate areas prone to contamination can be used to predict infection of other patients and medical staff in a radiotherapy room.
DOI	10.1093/jrr/rrac109
PMID	36715177