2026-03-05T08:00:49Z https://nagoya.repo.nii.ac.jp/oai

oai:nagoya.repo.nii.ac.jp:02001161 2023-11-16T02:04:36Z 499:508:509:1624513305190

Distribution of scatter radiation by C-arm cone-beam computed tomography in angiographic suite : measurement of doses and effectiveness of protection devices Yamaji, Mayako Ishiguchi, Tsuneo Koyama, Shuji Ikeda, Shuji Kitagawa, Akira Hagihara, Makiyo Itoh, Yuji Nakamura, Masaru Ota, Toyohiro Suzuki, Kojiro open access Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International scatter radiation radiation protection cone-beam computed tomography Distribution of radiation by C-arm cone-beam computed tomography (CBCT) in the angiographic suite and effectiveness of protection devices were assessed. CBCT image of a human phantom was obtained by a rotation of 220 degrees during 8 seconds of exposure. One hundred and twelve dosimeters were placed at different positions around the beam entry site, and color maps of dose distributions were drawn for horizontal and vertical planes. The measurements showed the highest radiation dose over 600 μGy by a single CBCT image acquisition at a distance of 60 cm from the beam entry site and a height of 90 cm from the floor. The color maps demonstrated the dose distribution to be more intense at the bilateral directions of the phantom. With the use of a ceiling-mounted transparent lead-acryl screen and a table-suspended lead curtain, the doses were reduced by 45–92 % at a direction of 210 degrees and a distance of 120 cm. Nagoya University Graduate School of Medicine, School of Medicine 2021-05 eng departmental bulletin paper VoR https://doi.org/10.18999/nagjms.83.2.277 http://hdl.handle.net/2237/0002001161 https://nagoya.repo.nii.ac.jp/records/2001161 10.18999/nagjms.83.2.277 https://www.med.nagoya-u.ac.jp/medlib/nagoya_j_med_sci/832.html 0027-7622 2186-3326 Nagoya Journal of Medical Science 83 2 277 286 https://nagoya.repo.nii.ac.jp/record/2001161/files/07_Yamaji.pdf application/pdf 10.1 MB 2021-06-25