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Performance of RapidPlan for Rectum Cancer with Dynamic IMRT

J Duan*, Shandong Cancer Hospital Affiliated to Shandong University


(Sunday, 7/14/2019)  

Room: ePoster Forums

Purpose: The conventional IMRT planning is tedious and repetitive. Its outcome depends on the planner performing the optimization. The study is to investigate the performance of RapidPlan in Varian Eclipse TPS for rectum cancer with fixed-field dynamic intensity-modulated radiation therapy (dMLC).

Methods: 20 previously treated rectum cancer patients were re-planned for dMLC using RapidPlan in Eclipse TPS. The PTV of rectum cancer contained gross target volume (GTV) and the positive lymph nodes. The volume of PTV ranged from 305 cm3 to 781 cm3. We compared the manual planning and the RapidPlan planning using DVH metrics.

Results: RapidPlan could generate clinically acceptable treatment plans for all the cases. The PTV coverage and the OAR sparing are similar in the two types of plans. The MUs of RapidPlan planning were slightly less than the manual plans. It's worth noting that RapidPlan could reduce the optimization time and increased the optimization efficiency.

Conclusion: Our study demonstrates that RapidPlan can produce clinically acceptable treatment plans. It makes IMRT process faster and efficient.


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