Implementation of PTW 1600SRS detector array for multi-leaf collimator quality assurance: Picket Fence and Spoke Shot tests case study
Driouch, M., Adib, Y., Almaamari, A., Youssoufi, M., Chakir, E., Ibrahmi, E., Elkacemi, H., Kebdani, T., Hassouni, K. (2025). Implementation of PTW 1600SRS detector array for multi-leaf collimator quality assurance: Picket Fence and Spoke Shot tests case study. EKB Journal Management System, 11(1), 110-120. doi: 10.21608/jbaar.2025.418305
M. Driouch; Y. Adib; Adeb A.S.A. Almaamari; M. A. Youssoufi; E. Chakir; E. Al Ibrahmi; H. Elkacemi; T. Kebdani; K. Hassouni. "Implementation of PTW 1600SRS detector array for multi-leaf collimator quality assurance: Picket Fence and Spoke Shot tests case study". EKB Journal Management System, 11, 1, 2025, 110-120. doi: 10.21608/jbaar.2025.418305
Driouch, M., Adib, Y., Almaamari, A., Youssoufi, M., Chakir, E., Ibrahmi, E., Elkacemi, H., Kebdani, T., Hassouni, K. (2025). 'Implementation of PTW 1600SRS detector array for multi-leaf collimator quality assurance: Picket Fence and Spoke Shot tests case study', EKB Journal Management System, 11(1), pp. 110-120. doi: 10.21608/jbaar.2025.418305
Driouch, M., Adib, Y., Almaamari, A., Youssoufi, M., Chakir, E., Ibrahmi, E., Elkacemi, H., Kebdani, T., Hassouni, K. Implementation of PTW 1600SRS detector array for multi-leaf collimator quality assurance: Picket Fence and Spoke Shot tests case study. EKB Journal Management System, 2025; 11(1): 110-120. doi: 10.21608/jbaar.2025.418305

Implementation of PTW 1600SRS detector array for multi-leaf collimator quality assurance: Picket Fence and Spoke Shot tests case study

Journal of Bioscience and Applied Research
Volume 11, Issue 1, March 2025, Page 110-120  XML PDF (776.34 K)
Document Type: Original Article
DOI: 10.21608/jbaar.2025.418305
View on SCiNiTO View on SCiNiTO
Authors
M. Driouch email orcid 1; Y. Adiborcid 2; Adeb A.S.A. Almaamariorcid 3; M. A. Youssoufiorcid 4; E. Chakirorcid 5; E. Al Ibrahmiorcid 5; H. Elkacemiorcid 6; T. Kebdaniorcid 6; K. Hassouni6
1IBN SINA specialized clinic, Kenitra, Morocco/ 2 LPMS, Faculty of Sciences, Ibn tofail University, Kenitra, Morocco
2LPHE-MS, Faculty of Science, Mohammed V University, Rabat, Morocco
3Department of Radiotherapy, National Institute of Oncology, UHC Ibn Sina, Mohammed V University, Rabat, Morocco/ Faculty of Medicine, Mohammed V University, Rabat, Morocco
4Faculty of Medicine, Mohammed V University, Rabat, Morocco
5LPMS, Faculty of Sciences, Ibn tofail University, Kenitra, Morocco
6Department of Radiotherapy, National Institute of Oncology, UHC Ibn Sina, Mohammed V University, Rabat, Morocco/ Faculty of Medicine, Mohammed V University, Rabat, Morocco
Abstract
Multi-Leaf Collimator is one of the most complex mechanical components of current medical linear accelerators which require more efficient and accurate quality assurance programs to be implemented. The main purpose of our work is to integrate a detector array to perform an objective analysis of classical MLC tests. A PTW SRS1600 array was sandwiched between upper and lower blocks of PMMA slabs. Two main mechanical tests, including picket fence and spoke shot, were designed in the treatment planning system on the acquired DICOM files of the measurement phantom. The sandwiched array is then irradiated under a VersaHD linac and the corresponding 2%/2mm and 1%/1mm GPR were acquired in the measurement week and the latter one. 2%/2mm is globally higher than 1%/1mm. For the spoke shot test, 2%/2mm decreases from the initial value at θ = 0˝ to the last angle at θ = 340˝ except for the 5mm aperture width measured the later week. For the 1%/1mm GPR criterion, all plots show a decreased value between θ = 200˝ and θ = 200˝ related to inaccurate MLC rotation. GPR-based picket fence shows a more stable variation of 2%/2mm for both 3mm and 5mm picket widths. For 3mm, a decreased value was observed at the central gap for both 2%/2mm and 1%/1mm, which disappears with a 5mm gap width. A detector array could be a beneficial approach for MLC QA, especially for objective analysis, performance reproducibility tracking, and system accuracy variation.
Keywords
Multi-Leaf Collimator; A PTW SRS1600 array; sandwiched array
Statistics
Article View: 236
PDF Download: 146