Yutaka Kato, Shintaro Okumiya, Kuniyasu Okudaira, Junji Ito, Motoki Kumagai, Takeshi Kamomae, Yumiko Noguchi, Mariko Kawamura, Shunichi Ishihara, Shinji Naganawa
Prostatic urethra identification is crucial in prostate stereotactic body radiotherapy (SBRT) to reduce the risk of urinary toxicity. Although computed tomography (CT) with a catheter is commonly employed, it is invasive, and catheter placement may displace the urethral position, resulting in possible planning inaccuracies. However, magnetic resonance imaging (MRI) can overcome these weaknesses. Accurate urethral identification and minimal daily variation could ensure a highly accurate SBRT. In this study, we investigated the usefulness of a three-dimensional (3D) T2-weighted (T2W) sequence for urethral identification, and the interfractional motion of the prostatic urethra on CT with a catheter and MRI without a catheter for implementing noninvasive SBRT...
August 2023: Nagoya Journal of Medical Science