ANALYSIS OF POINT A DOSE IN PATIENTS WITH CERVICAL CANCER TREATED WITH HIGH DOSE RATE BRACHYTHERAPY.

Authors

  • Seni Raruen

Abstract

Purpose : To compare the prescribing dose at point A using total reference air Kerma in patients with cervical cancer who were treated with fractionated Iridium -192 High dose rate brachytherapy.

Materials and Methods : Thirty-two patients with cervical cancer , stage IIB -IIIB were treated with conventional external radiation and Iridium-192 High dose rate brachytherapy 5 Gy per fraction , 5 fractions weekly. Treatment planning of brachytherapy were done at the first and fourth fraction. Dose rate at point A from 2 plannings were compared, using total reference air Kerma.

Results : Mean of the percentage of difference between 2 plannings was 0.365312 with SD. 0.046202.

Conclusion : For roughly planning , with dose rate of 5 Gy per fraction at point A TRAK about 0.37 cGy at I meter can be used with satisfactory.  

References

Cancer Statistics Annual Report , National Cancer Institute , Department of Medical Service , Ministry of Public Health, 1990-1995

Ezzell GA : Quality assurance in HDR brachytherapy: Physical and technical aspects. Activity 1991; 5:59-62.

Saw CB, Suntharalingam N: Reference dose rates for single- and double-plane 192 Ir implants. Med Phys 1998; 15:391-396.

Williamson JF,Anderson LL, Grigsby PW, et al: American Endocurie-therapy Society recommendations for specification of brachytherapy source strength. Endocuriether Hypertherm Oncol 1993; 9:1-7.

Orton CG, Ezzell GA : Physics and do simetry of high dose-rate brachy-therapy. Principles and Practice of Radiat Oncol 1998; 469-483.

Fu K, Phillips TL: High-dose-rate versus low- dose-rate intracavitary brachy-therapy for carcinoma of the cervix. Int J Radiat Oncol Biol Phys 1990; 19:791-796.

Orton CG: High dose rate versus low dose rate brachytherapy for gynecological cancer. Semin Radiat Oncol 1993; 3:232-239.

Orton CG, Seyedsadr M , Somnay A: Comparison of high and low dose rate remote afterloading for cervix cancer and the importance of fractionation. Int J Radiat Oncol Biol Phys 1991; 21:1425-1434.

Patel FD, Sharma SC, Negi PS, et al: Low dose rate vs. high dose rate brachytherapy in the treatment of carcinoma of the uterine cervix : A Clinical trial. Int J Radiat Oncol Biol Phys 1994; 28:335-341.

Downloads

Published

2025-03-07

How to Cite

1.
Raruen S. ANALYSIS OF POINT A DOSE IN PATIENTS WITH CERVICAL CANCER TREATED WITH HIGH DOSE RATE BRACHYTHERAPY. J Thai Assn of Radiat Oncol [internet]. 2025 Mar. 7 [cited 2025 Dec. 27];4(2):22-4. available from: https://he01.tci-thaijo.org/index.php/jtaro/article/view/277816

Issue

Section

Original articles