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Koji Ono,Takafumi Kumasawa,Keiichi Shimatani,Masatoshi Kanou,Ichiro Yamaguchi,Naoki Kunugita 대한방사선방어학회 2022 방사선방어학회지 Vol.47 No.2
Background: The present study investigated the radiation dose distribution of balloon kyphoplasty (BKP) among surgeons and medical staff, and this is the first research to observe such exposure in Japan. Materials and Methods: The study subjects were an orthopedic surgeon (n = 1) and surgical staff (n = 9) who intervened in BKP surgery performed at the National Hospital Organization Disaster Medical Center (Tokyo, Japan) between March 2019 and October 2019. Only disposable protective gloves (0.022 mmPb equivalent thickness or less) and trunk protectors were used, and no protective glasses or thyroid drapes were used. Results and Discussion: The surgery time per vertebral body was 36.2 minutes, and the fluoroscopic time was 6.8 minutes. The average exposure dose per vertebral body was 1.46 mSv for the finger (70 μm dose equivalent), 0.24 mSv for the lens of the eye (3 mm dose equivalent), 0.11 mSv for the neck (10 mm dose equivalent), and 0.03 mSv for the chest (10 mm dose equivalent) under the protective suit.The estimated cumulative radiation exposure dose of 23 cases of BKP was calculated to be 50.37 mSv for the fingers, 8.27 mSv for the lens, 3.91 mSv for the neck, and 1.15 mSv for the chest. Conclusion: It is important to know the exposure dose of orthopedic surgeons, implement measures for exposure reduction, and verify the safety of daily use of radiation during surgery and examination.
Prasetia Utama Putra,Keisuke Shima,Sayaka Hotchi,Koji Shimatani 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10
This study presents a markerless behavior evaluation system employing multiple RGB cameras and Kinect V2 sensors to assists clinicians in identifying disorder symptoms in children. The system utilizes OpenPTrack with Kinect sensors to track children’s and toys’ positions and records their activity using RGB cameras. Children’s activity was estimated by computing the distance between them and the toys. Children’s behavior was modeled with a Petri net, and four features were extracted from the model. We conducted preliminary experiments with four typical and three ASD disorder children. The experimental results demonstrated that the frequency of changing activity and playing alone was more informative than the others to distinguish ASD children from the typical ones.