Dosimetric verification of flattening filter free model based on TrueBeam accelerator using ArcCheck system.
10.11817/j.issn.1672-7347.2018.08.007
- Author:
Yuxing ZHU
1
;
Dongyong SHAN
1
;
Shizhen BIN
1
;
Junjun ZHANG
1
;
Ji ZHANG
1
;
Xiaoming LIU
2
;
Ke CAO
1
;
Shulin CHENG
1
Author Information
1. Department of Oncology, Third Xiangya Hospital, Central South University, Changsha 410013, China.
2. Department of Gastroenterology, Third Xiangya Hospital, Central South University, Changsha 410013, China.
- Publication Type:Journal Article
- MeSH:
Feasibility Studies;
Humans;
Phantoms, Imaging;
Radiosurgery;
methods;
Radiotherapy Dosage;
Radiotherapy Planning, Computer-Assisted;
Radiotherapy, Intensity-Modulated
- From:
Journal of Central South University(Medical Sciences)
2018;43(8):864-868
- CountryChina
- Language:Chinese
-
Abstract:
To study the feasibility of ArcCheck verification system in dosimetric verification for stereotactic radiotherapy (SRT) the stereotactic radiotherapy (SRT) with flattening filter free (FFF) model.
Methods: A total of 76 cases under SRT treatment plans were introduced into ArcCheck phantom and recalculated. Threshold criteria was set as (3%, 3 mm, 10%) or (2%, 2 mm, 10%). The calculated dose distribution and the measured dose distribution of ArcCheck phantom were compared by means of distance to agree (DTA) and Gamma analysis method respectively.
Results: Based on the threshold criteria (3%, 3 mm, 10%), the relative and absolute mean pass rates of SRT treatment plans by DTA and Gamma analysis were greater than 95%. Based on the threshold criteria (2%, 2 mm, 10%), the relative and absolute mean pass rates of SRT treatment plan by DTA and Gamma analysis were about 90%. The dose pass rate of Gamma analysis method was slightly higher than that of DTA analysis method (P<0.001).
Conclusion: The ArcCheck verification system is a rapid and accurate method for SRT dose verification, and discrepancies are found in different analysis methods.
