Acceptance and commissioning testing of multiparametric imaging using the big bore dual-source CT simulator for radiotherapy
10.13491/j.issn.1004-714X.2025.05.022
- VernacularTitle:放疗大孔径双源CT模拟定位机多参数成像的验收服役测试
- Author:
Meijiao WANG
1
;
Yi DU
1
;
Kaining YAO
1
;
Zhongsu FENG
1
;
Jixiang CHEN
1
;
Hao WU
1
;
Kaixuan LI
2
;
Haizhen YUE
1
Author Information
1. Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Radiotherapy, Peking University Cancer Hospital & Institute, Beijing 100142, China.
2. The Outpatient Department of the People's Liberation Army Unit 93199, Haerbin 150001, China.
- Publication Type:OriginalArticles
- Keywords:
Dual-source CT;
Big bore CT simulator;
Acceptance testing;
Commissioning verification;
Radiotherapy
- From:
Chinese Journal of Radiological Health
2025;34(5):764-769
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the accuracy of multiparametric imaging on the dual-source CT through acceptance and commissioning testing, and to provide a reference for standardized clinical application. Methods Both the adult and pediatric dual-source CT scanning modes were used to scan the electron density phantom, and identical multiparametric image reconstruction tasks were performed, including the conventional CT images, the mixed CT images, the virtual monoenergetic images, the iodine images, the electron density images, and the effective atomic number images. Results In the adult scanning mode, the virtual monoenergetic CT numbers showed the greatest difference for the cortical bone (1722 HU at 40 keV vs. 30 HU at 80 keV), with smaller differences observed for other materials as their atomic numbers decreased. The pediatric scanning mode exhibited a similar trend, with the largest difference occurring at 40 keV (1393 HU). In the adult scanning mode, the deviations between the theoretical and measured iodine concentration values were all within 5%, whereas in the pediatric scanning mode, the largest deviation was 15% for an iodine concentration of 2.0 mg/mL. For the electron density, the largest deviation between the theoretical and measured values occurred in the LN450 lung (9.18% in the adult scanning mode and 8.96% in the pediatric scanning mode); the deviations for the LN300 lung were all below 7.2%, for aluminum below 6.3%, and for other tissues within 3%. For the effective atomic number, the deviations between the theoretical and measured values were all within 5% in both scanning modes. Conclusion To ensure the accuracy and reproducibility of the dual-source CT applications, a comprehensive acceptance testing protocol should be established to guarantee the safety and precision of the CT localization process.
