Journal of Yeungnam Medical Science

Original Articles

Dose distribution of Intensity Modulated Radiation Therapy and 3 Dimensional Conformal Radiation Therapy in Prostate Cancer: Sung Kyu Kim, Myung Se Kim, Sang Mo Yun; Yeungnam Univ J Med. 2007;24(2 Suppl):S538-543. Published online December 31, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.2S.S538

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Purpose：The aim of this study was to compare the dose distribution of intensity modulated radiation therapy (IMRT) with 3 dimensional conformal radiation therapy (3DCRT) in prostate cancer. Materials and Methods：The IMRT plan and the 3DCRT plan used the 9 fields technique, respectively. In IMRT, tumor dose was a total dose of 50 Gy at 2.0 Gy per day, 5 days a week for 5 weeks. All cases were following the dose volume histogram (DVH) constraints. The maximum and minimum tumor dose constraints were 5,075 cGy and 4,925 cGy, respectively. The rectum dose constraints were <35% over 40 Gy. The bladder dose constraints were <35% over 30 Gy. The femur head dose constraints were <15% over 16 Gy. Tumor dose in the 3DCRT were 50 Gy.
Results
：In IMRT, the maximum dose of PTV was 101.9% and minimum dose was 89.5% for given dose. In 3DCRT, the maximum dose of PTV was 103.5% and minimum dose was 86.5% for given dose. The rectum dose was 29.2% over 40 Gy in IMRT compared with 67.9% in 3DCRT. The bladder dose was 30.1% over 30 Gy in IMRT compared with 30.6% in 3DCRT. The right femur head dose was 5.3% over 16 Gy in IMRT compared with 8.3% in 3DCRT. The left femur head dose was 6.8% over 16 Gy in IMRT compared with 9.1% in 3 DCRT.
Conclusion
：The dose of critical organs (rectum, bladder, and femur head) in IMRT showed to reduce than dose of 3DCRT. The rectum dose over 40 Gy in IMRT was reduced 38.7% than 3DCRT. The bladder dose over 30 Gy in IMRT was similar to 3DCRT. The femur head dose over 16 Gy in IMRT was reduced about 2.3∼3% than 3DCRT.

Citations

Citations to this article as recorded by

Changes in Volume Dose by Treatment Plan According to pCT and CBCT in Image-guided Radiation Therapy for Prostate Cancer
Young Jin Won, Jung Hoon Kim
Journal of Radiological Science and Technology.2018; 41(3): 209. CrossRef
A Comparison between Three Dimensional Radiation Therapy and Intensity Modulated Tadiation Yherapy on Prostate Cancer
YoungJae Kim, JaeSub Lee, Seongill Hong, HyeJin Ko
Journal of the Korean Society of Radiology.2013; 7(6): 409. CrossRef

The Dosimetry of Radiosurgery using of Rando Phantom.: Sung Kyu Kim, Sei One Shin, Myung Se Kim; Yeungnam Univ J Med. 1990;7(1):113-119. Published online June 30, 1990; DOI: https://doi.org/10.12701/yujm.1990.7.1.113

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Abstract PDF: The stereotactic radiosurgery using ionizing radiation of high energy is a technique for exadicating intracranial small tumors, which are inaccessible or unsuitable for open surgical technique. For such a small field radiosurgery, TLD or film dosimetry is essential. The three dimensional dose planning of radiosurgery was performed with dose planning computer system (Therac 2300). The target dose distribution and its error according to patient position were discussed. And were measured of circular cone which specially designed in our Hospital. The position error of Rando Phantom compared with CT were 0.4 mm in the AP-LAT section and in the AP-VERT section, 1.0 mm in the AP-VERT 45°section. The ratio of accuracy of the gantry and couch rotation were 1.5 mm diameter for central axis of 18MeV linear accelerator. Our study suggested that radiosurgery of small field in out department will be appropriate for clinical application.

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