Two-dimensional in vivo rectal dosimetry using an endorectal balloon with unfoldable radiochromic film during prostate cancer radiotherapy.

The present study aims to investigate the feasibility of two-dimensional (2D) in vivo rectal dosimetry using an endorectal balloon for the radiotherapy of prostate cancer.

The endorectal balloon was equipped with an unfoldable radiochromic film. The film was unrolled as the balloon was inflated, and rolled as it was deflated. Its mechanical and imaging properties were tested, and the dosimetric effectiveness was evaluated in clinical photon and proton beams.

The size of the endorectal balloon including the film was linearly proportional to the volume of water filled in the balloon, and its position could be identified by X-ray radiography. The loss of dose information due to film cutting was within ±1mm from the cutting line. Applying linear interpolation on cut film, the gamma passing rate was more than 95% for 2%/2mm criteria. The measured dose profiles agreed with the plan within 3% and 4% for the photon and proton beams, respectively. A dose-volume histogram of the anterior rectal wall could be obtained from the measured dose distribution in the balloon, which also agreed well with the plan.

2D in vivo rectal dosimetry is feasible using the endorectal balloon with a radiochromic film in the radiotherapy of prostate cancer.

Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology. 2016 May 21 [Epub ahead of print]

Eun Hee Jeang, Soonki Min, Kwan Ho Cho, Ui-Jung Hwang, Sang Hyoun Choi, Jungwon Kwak, Jong Hwi Jeong, Haksoo Kim, Se Byeong Lee, Dongho Shin, Jeonghoon Park, Joo-Young Kim, Dae Yong Kim, Young Kyung Lim

Proton Therapy Center, National Cancer Center, Goyang, Republic of Korea., Proton Therapy Center, National Cancer Center, Goyang, Republic of Korea., Proton Therapy Center, National Cancer Center, Goyang, Republic of Korea., Department of Radiation Oncology, National Medical Center, Seoul, Republic of Korea., Department of Radiation Oncology, Korea Cancer Center Hospital, Seoul, Republic of Korea., Department of Radiation Oncology, Asan Medical Center, Seoul, Republic of Korea., Proton Therapy Center, National Cancer Center, Goyang, Republic of Korea., Proton Therapy Center, National Cancer Center, Goyang, Republic of Korea., Proton Therapy Center, National Cancer Center, Goyang, Republic of Korea., Proton Therapy Center, National Cancer Center, Goyang, Republic of Korea., Proton Therapy Center, National Cancer Center, Goyang, Republic of Korea., Proton Therapy Center, National Cancer Center, Goyang, Republic of Korea., Proton Therapy Center, National Cancer Center, Goyang, Republic of Korea., Proton Therapy Center, National Cancer Center, Goyang, Republic of Korea. Electronic address: .

E-Newsletters

Newsletter subscription

Free Daily and Weekly newsletters offered by content of interest

The fields of GU Oncology and Urology are rapidly advancing. Sign up today for articles, videos, conference highlights and abstracts from peer-review publications by disease and condition delivered to your inbox and read on the go.

Subscribe