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Title: SU-E-T-43: A Methodology for Quality Control of IMPT Treatment Plan Based On VMAT Plan

Abstract

Purpose: IMPT plan design is highly dependent on planner’s experiences. VMAT plan design is relatively mature and can even be automated. The quality of IMPT plan designed by in-experienced planner could be inferior to that of VMAT plan designed by experienced planner or automatic planning software. Here we introduce a method for designing IMPT plan based on VMAT plan to ensure the IMPT plan be superior to IMRT/VMAT plan for majority clinical scenario. Methods: To design a new IMPT plan, a VMAT plan is first generated either by experienced planner or by in-house developed automatic planning system. An in-house developed tool is used to generate the dose volume constrains for the IMPT plan as plan template to Eclipse TPS. The beam angles for IMPT plan are selected based on the preferred angles in the VMAT plan. IMPT plan is designed by importing the plan objectives generated from VMAT plan. Majority thoracic IMPT plans are designed using this plan approach in our center. In this work, a thoracic IMPT plan under RTOG 1308 protocol is selected to demonstrate the effectiveness and efficiency of this approach. The dosimetric indices of IMPT are compared with VMAT plan. Results: The PTV D95, lung V20,more » MLD, mean heart dose, esophagus D1, cord D1 are 70Gy, 31%, 17.8Gy, 25.5Gy, 73Gy, 45Gy for IMPT plan and 65.3Gy, 34%, 21.6Gy, 35Gy, 74Gy, 48Gy for VMAT plan. For majority cases, the high dose region of the normal tissue which is in proximity of PTV is comparable between IMPT and VMAT plan. The low dose region of the IMPT plan is significantly better than VMAT plan. Conclusion: Using the knowledge gained in VMAT plan design can help efficiently and effectively design high quality IMPT plan. The quality of IMPT plan can be controlled to ensure the superiority of IMPT plan compared to VMAT/IMRT plan.« less

Authors:
 [1];  [2];  [1];  [2]; ; ; ; ;  [1]
  1. UT MD Anderson Cancer Center (United States)
  2. (China)
Publication Date:
OSTI Identifier:
22545175
Resource Type:
Journal Article
Resource Relation:
Journal Name: Medical Physics; Journal Volume: 42; Journal Issue: 6; Other Information: (c) 2015 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; ANIMAL TISSUES; COMPUTER CODES; ESOPHAGUS; HEART; LUNGS; QUALITY CONTROL; RADIATION DOSES; RADIOTHERAPY

Citation Formats

Jiang, S, Tianjin Medical University Cancer Institute and Hospital, Yang, Y, Tianjin First Center Hospital, Liao, L, Wang, X, Li, H, Zhu, X, and Zhang, X. SU-E-T-43: A Methodology for Quality Control of IMPT Treatment Plan Based On VMAT Plan. United States: N. p., 2015. Web. doi:10.1118/1.4924404.
Jiang, S, Tianjin Medical University Cancer Institute and Hospital, Yang, Y, Tianjin First Center Hospital, Liao, L, Wang, X, Li, H, Zhu, X, & Zhang, X. SU-E-T-43: A Methodology for Quality Control of IMPT Treatment Plan Based On VMAT Plan. United States. doi:10.1118/1.4924404.
Jiang, S, Tianjin Medical University Cancer Institute and Hospital, Yang, Y, Tianjin First Center Hospital, Liao, L, Wang, X, Li, H, Zhu, X, and Zhang, X. Mon . "SU-E-T-43: A Methodology for Quality Control of IMPT Treatment Plan Based On VMAT Plan". United States. doi:10.1118/1.4924404.
@article{osti_22545175,
title = {SU-E-T-43: A Methodology for Quality Control of IMPT Treatment Plan Based On VMAT Plan},
author = {Jiang, S and Tianjin Medical University Cancer Institute and Hospital and Yang, Y and Tianjin First Center Hospital and Liao, L and Wang, X and Li, H and Zhu, X and Zhang, X},
abstractNote = {Purpose: IMPT plan design is highly dependent on planner’s experiences. VMAT plan design is relatively mature and can even be automated. The quality of IMPT plan designed by in-experienced planner could be inferior to that of VMAT plan designed by experienced planner or automatic planning software. Here we introduce a method for designing IMPT plan based on VMAT plan to ensure the IMPT plan be superior to IMRT/VMAT plan for majority clinical scenario. Methods: To design a new IMPT plan, a VMAT plan is first generated either by experienced planner or by in-house developed automatic planning system. An in-house developed tool is used to generate the dose volume constrains for the IMPT plan as plan template to Eclipse TPS. The beam angles for IMPT plan are selected based on the preferred angles in the VMAT plan. IMPT plan is designed by importing the plan objectives generated from VMAT plan. Majority thoracic IMPT plans are designed using this plan approach in our center. In this work, a thoracic IMPT plan under RTOG 1308 protocol is selected to demonstrate the effectiveness and efficiency of this approach. The dosimetric indices of IMPT are compared with VMAT plan. Results: The PTV D95, lung V20, MLD, mean heart dose, esophagus D1, cord D1 are 70Gy, 31%, 17.8Gy, 25.5Gy, 73Gy, 45Gy for IMPT plan and 65.3Gy, 34%, 21.6Gy, 35Gy, 74Gy, 48Gy for VMAT plan. For majority cases, the high dose region of the normal tissue which is in proximity of PTV is comparable between IMPT and VMAT plan. The low dose region of the IMPT plan is significantly better than VMAT plan. Conclusion: Using the knowledge gained in VMAT plan design can help efficiently and effectively design high quality IMPT plan. The quality of IMPT plan can be controlled to ensure the superiority of IMPT plan compared to VMAT/IMRT plan.},
doi = {10.1118/1.4924404},
journal = {Medical Physics},
number = 6,
volume = 42,
place = {United States},
year = {Mon Jun 15 00:00:00 EDT 2015},
month = {Mon Jun 15 00:00:00 EDT 2015}
}