| Lin Hailei,Sha Xiangyan,Wang Dan,et al.SunCHECK and ArcCHECK dosimetric verification systems for radiotherapy: Tolerance and action limit settings and consistency of gamma passing rates[J].Chinese Journal of Radiological Medicine and Protection,2025,45(12):1259-1265 |
| SunCHECK and ArcCHECK dosimetric verification systems for radiotherapy: Tolerance and action limit settings and consistency of gamma passing rates |
| Received:April 25, 2025 |
| DOI：10.3760/cma.j.cn112271-20250425-00150 |
| KeyWords:Intensity modulated radiation therapy Patient-specific quality assurance Dosimetric verification Gamma passing rate |
| FundProject: |
| Author Name | Affiliation | E-mail | | Lin Hailei | Department of Radiation Oncology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China | | | Sha Xiangyan | Department of Radiation Oncology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China | | | Wang Dan | Department of Radiation Oncology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China | | | Wang Rui | Department of Radiation Oncology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China | | | Wu Qinhong | Department of Radiation Oncology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China | | | Zhong Qiuzi | Department of Radiation Oncology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China | drzhongqiuzi@163.com | | Xu Yonggang | Department of Radiation Oncology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China | | | Li Gaofeng | Department of Radiation Oncology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China | |
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| Abstract:: |
| Objective To clarify the differences in the tolerance limit (TL) and action limit (AL) settings, as well as the consistency of gamma passing rates (GPRs), between two dosimetric verification systems SunCHECK and ArcCHECK for radiotherapy based on a comparison of the GPRs, dose deviations, and related parameters of both systems in intensity modulated radiation therapy (IMRT).Methods A retrospective study was conducted based on 71 patients with head and neck tumors, thoracic tumors, and abdominal-pelvic tumors who received IMRT. Their doses in IMRT were verified using both the SunCHECK and ArcCHECK systems. Based on the GPR, the TLs and ALs of different tumor groups were calculated. Then, the volumetric dose deviations of the target volumes and organs at risk (OARs), as well as their Pearson correlations with the GPR, were analyzed. Additionally, the consistency of the GPRs between both systems was assessed using the Bland-Altman method.Results Under the criteria of 3%/3 mm and 3%/2 mm, the two systems exhibited small differences in GPRs, with all differences derived from the Bland-Altman analysis falling within the 95% confidence interval. However, under the 2%/2 mm criterion, both systems presented significant GPR differences between the thoracic and the abdominal-pelvic tumor groups, with the GPR consistency exceeding the 95% confidence interval. Under the 3%/2 mm criterion, both systems displayed TLs ≥ 95.27% and ALs ≥ 93.52% for the head and neck tumor group and abdominal-pelvic tumor group, as well as TLs ≥ 93.90% and ALs ≥ 90.92% for the thoracic tumor group. In addition, the SunCHECK system yielded a strong negative correlation between the volumetric dose deviation of the target volumes and the GPR (r = -0.77 to -0.43, P < 0.05). Conversely, the SunCHECK system showed inconsistent correlations, which were weak or insignificant overall, between the volumetric dose deviation of OARs.Conclusions The SunCHECK and ArcCHECK systems demonstrate highly consistent GPRs under the criteria of 3%/3 mm and 3%/2 mm. Furthermore, the dynamic adjustment of TL and AL settings and the deviation evaluation in combination with volumetric dosimetry parameters are crucial to optimizing patient-specific quality assurance (PSQA). |
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