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KMID : 1164220050170020113
Journal of Korean Society for Radiotherapeutic Technology
2005 Volume.17 No. 2 p.113 ~ p.124
Rectal Balloon for the Immobilization of the Prostate Internal Motion
Lee Sang-Kyu

Beak Jong-Geal
Kim Joo-Ho
Jeon Byong-Chul
Cho Jeong-Hee
Kim Dong-Wook
Na Soo-Kyung
Song Tae-Soo
Cho Jae-Ho
Abstract
Purpose : The using of endo-rectal balloon has proposed as optimal method that minimized the motion of prostate and the dose of rectum wall volume for treated prostate cancer patients, so we make the customized rectal balloon device. In this study, we analyzed the efficiency of the Self-customized rectal balloon in the aspects of its reproducibility.

Materials and Methods : In 5 patients, for treatment planning, each patient was acquired CT slice images in state of with and without rectal balloon. Also they had CT scanning samely repeated third times in during radiation treatment (IMRT). In each case, we analyzed the deviation of rectal ballon position and verified the isodose distribution of rectum wall at closed prostate.

Results : Using the rectal balloon, we minimized the planning target volume (PTV) by decreased the internal motion of prostate and overcome the dose limit of radiation therapy in prostate cancer by increased the gap between the rectum wall and high dose region.

Conclusion : The using of rectal balloon, although, was reluctant to treat by patients. View a point of immobilization of prostate internal motion and dose escalation of GTV (gross tumor volume), its using consider large efficients for treated prostate cancer patients.
KEYWORD
prostate cancer, rectal balloon, IMRT
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