Visualizing the urethra by magnetic resonance imaging without usage of a catheter for radiotherapy of prostate cancer

Takaaki Yoshimura; Kentaro Nishioka; Takayuki Hashimoto; Taro Fujiwara; Kinya Ishizaka; Hiroyuki Sugimori; Shoki Kogame; Kazuya Seki; Hiroshi Tamura; Sodai Tanaka; Yuto Matsuo; Yasuhiro Dekura; Fumi Kato; Hidefumi Aoyama; Shinichi Shimizu

Physics and Imaging in Radiation Oncology (Apr 2021)

Visualizing the urethra by magnetic resonance imaging without usage of a catheter for radiotherapy of prostate cancer

Takaaki Yoshimura,
Kentaro Nishioka,
Takayuki Hashimoto,
Taro Fujiwara,
Kinya Ishizaka,
Hiroyuki Sugimori,
Shoki Kogame,
Kazuya Seki,
Hiroshi Tamura,
Sodai Tanaka,
Yuto Matsuo,
Yasuhiro Dekura,
Fumi Kato,
Hidefumi Aoyama,
Shinichi Shimizu

Affiliations

Takaaki Yoshimura: Department of Health Sciences and Technology, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan; Department of Medical Physics, Hokkaido University Hospital, Sapporo, Japan
Kentaro Nishioka: Department of Radiation Medical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, Japan
Takayuki Hashimoto: Department of Radiation Medical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, Japan
Taro Fujiwara: Department of Radiation Technology, Hokkaido University Hospital, Sapporo, Japan
Kinya Ishizaka: Department of Radiation Technology, Hokkaido University Hospital, Sapporo, Japan
Hiroyuki Sugimori: Department of Biomedical Science and Engineering, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
Shoki Kogame: Division of Radiological Science and Technology, Department of Health Sciences, School of Medicine, Hokkaido University, Sapporo, Japan
Kazuya Seki: Division of Radiological Science and Technology, Department of Health Sciences, School of Medicine, Hokkaido University, Sapporo, Japan
Hiroshi Tamura: Department of Radiation Technology, Hokkaido University Hospital, Sapporo, Japan
Sodai Tanaka: Department of Medical Physics, Hokkaido University Hospital, Sapporo, Japan; Faculty of Engineering, Hokkaido University, Sapporo, Japan
Yuto Matsuo: Department of Medical Physics, Hokkaido University Hospital, Sapporo, Japan
Yasuhiro Dekura: Department of Radiation Oncology, Faculty of Medicine, Hokkaido University, Sapporo, Japan
Fumi Kato: Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Japan
Hidefumi Aoyama: Department of Radiation Oncology, Faculty of Medicine, Hokkaido University, Sapporo, Japan
Shinichi Shimizu: Department of Medical Physics, Hokkaido University Hospital, Sapporo, Japan; Department of Radiation Medical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, Japan; Global Center for Biomedical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, Japan; Corresponding author at: Department of Radiation Medical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, Japan.

Journal volume & issue: Vol. 18
pp. 1 – 4

Abstract

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The urethra position may shift due to the presence/absence of the catheter. Our proposed post-urination-magnetic resonance imaging (PU-MRI) technique is possible to identify the urethra without catheter. We aimed to verify the inter-operator difference in contouring the urethra by PU-MRI. The mean values of the evaluation indices of dice similarity coefficient, mean slice-wise Hausdorff distance, and center coordinates were 0.93, 0.17 mm, and 0.36 mm for computed tomography, and 0.75, 0.44 mm, and 1.00 mm for PU-MRI. Therefore, PU-MRI might be useful for identifying the prostatic urinary tract without using a urethral catheter.Clinical trial registration: Hokkaido University Hospital for Clinical Research (018-0221).

Published in Physics and Imaging in Radiation Oncology

ISSN: 2405-6316 (Online)
Publisher: Elsevier
Country of publisher: Ireland
LCC subjects: Medicine: Medicine (General): Medical physics. Medical radiology. Nuclear medicine; Medicine: Internal medicine: Neoplasms. Tumors. Oncology. Including cancer and carcinogens
Website: https://www.journals.elsevier.com/physics-and-imaging-in-radiation-oncology/

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