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Program Information

Development and Clinical Implementation of Radiotherapy Planning Supporting System

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Y Adachi

Y Adachi1*, M Nozue2 , T Matsunaga1 , N Hayashi3 , R Yada4 (1) Seirei Hamamatsu Hospital, Hamamatsu, Shizuoka, (2) Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, (3) School of Health Sciences, Fujita Health University, Toyoake, Aichi, (4) Kobe University Hospital, Kobe, Hyogo


SU-I-GPD-T-389 (Sunday, July 30, 2017) 3:00 PM - 6:00 PM Room: Exhibit Hall

Purpose: The dose-volume-histogram (DVH) is one of valuable factors to evaluate the feasibility of radiotherapy plan. In our hospital, we use DVH evaluation for decreasing inter-planner variations in actual radiotherapy planning. However, the detailed DVH analysis requires too much times. The purposes of this research are to develop radiotherapy planning supporting system in order to simplify DVH analysis and to evaluate the program for clinical implementation.

Methods: The in-house program for DVH analysis was developed by Visual Studio 2015 (Microsoft). After radiotherapy plan transferred from treatment planning workstation (Ecliplse Ver.13.6, Varian), the program can evaluate DVH variations towards radiotherapy plan in comparison with institutional clinical criteria. In this study, 60 radiotherapy plans which two radiation oncologists created were randomly chosen for analysis. Both feasibility and planning time were compared between radiotherapy plan with and without our program.

Results: It took 5:02±1:52 minutes (n=30) to create radiotherapy plan without our program. However, it took just 00:49±00:09 (n=30) minutes to create similar plan with our program. When the number of structures was increased, radiation oncologists took longer time for DVH evaluation. In addition, 23% of cases were incompletely satisfied our clinical criteria when our program was not used. With our program, all cases were not only satisfied our clinical criteria but also decreased human error due to their overlooks even though the number of structures was large. As the result, inter-planner variation could be minimized by use of our program.

Conclusion: We could build a program for DVH evaluation simply in radiotherapy planning. This program is useful for independent DVH evaluation and able to improve inter-planner variation in radiotherapy planning.

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