A Comprehensive Computer Program for Monitor Unit Calculation and Beam Data Management: Independent Verification of Radiation Treatment Planning Systems.
- Author:
Hee Jung KIM
1
;
Yang Kyun PARK
;
Jong Min PARK
;
Chang Heon CHOI
;
Jung In KIM
;
Sang Won LEE
;
Heon Jin OH
;
Chunil LIM
;
Il Han KIM
;
Sung Joon YE
Author Information
1. Department of Radiation Applying Life Science, Seoul National University Graduate School, Korea.
- Publication Type:Original Article
- Keywords:
Radiation Treatment Planning System (RTPS);
Monitor Unit (MU);
Beam data
- MeSH:
Animals;
Humans;
Mice;
Organothiophosphorus Compounds;
Software
- From:Korean Journal of Medical Physics
2008;19(4):231-240
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
We developed a user-friendly program to independently verify monitor units (MUs) calculated by radiation treatment planning systems (RTPS), as well as to manage beam database in clinic. The off-axis factor, beam hardening effect, inhomogeneity correction, and the different depth correction were incorporated into the program algorithm to improve the accuracy in calculated MUs. A beam database in the program was supposed to use measured data from routine quality assurance (QA) processes for timely update. To enhance user's convenience, a graphic user interface (GUI) was developed by using Visual Basic for Application. In order to evaluate the accuracy of the program for various treatment conditions, the MU comparisons were made for 213 cases of phantom and for 108 cases of 17 patients treated by 3D conformal radiation therapy. The MUs calculated by the program and calculated by the RTPS showed a fair agreement within +/-3% for the phantom and +/-5% for the patient, except for the cases of extreme inhomogeneity. By using Visual Basic for Application and Microsoft Excel worksheet interface, the program can automatically generate beam data book for clinical reference and the comparison template for the beam data management. The program developed in this study can be used to verify the accuracy of RTPS for various treatment conditions and thus can be used as a tool of routine RTPS QA, as well as independent MU checks. In addition, its beam database management interface can update beam data periodically and thus can be used to monitor multiple beam databases efficiently.
