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Samadi Miandoab, Payam, Setayeshi, Saeed, Saramad, shahyar. (1403). Clinical Accuracy Analysis and Error Modeling in the CyberKnife System; A Comparative Study. , 22(1), 36-43. doi: 10.22038/ijmp.2024.80469.2411
Payam Samadi Miandoab; Saeed Setayeshi; shahyar Saramad. "Clinical Accuracy Analysis and Error Modeling in the CyberKnife System; A Comparative Study". , 22, 1, 1403, 36-43. doi: 10.22038/ijmp.2024.80469.2411
Samadi Miandoab, Payam, Setayeshi, Saeed, Saramad, shahyar. (1403). 'Clinical Accuracy Analysis and Error Modeling in the CyberKnife System; A Comparative Study', , 22(1), pp. 36-43. doi: 10.22038/ijmp.2024.80469.2411
Samadi Miandoab, Payam, Setayeshi, Saeed, Saramad, shahyar. Clinical Accuracy Analysis and Error Modeling in the CyberKnife System; A Comparative Study. , 1403; 22(1): 36-43. doi: 10.22038/ijmp.2024.80469.2411

Clinical Accuracy Analysis and Error Modeling in the CyberKnife System; A Comparative Study

Iranian Journal of Medical Physics
دوره 22، شماره 1، فروردین و اردیبهشت 2025، صفحه 36-43    اصل مقاله (1.38 M)
نوع مقاله: Original Paper
شناسه دیجیتال (DOI): 10.22038/ijmp.2024.80469.2411
نویسندگان
Payam Samadi Miandoab* ؛ Saeed Setayeshi؛ shahyar Saramad
Department of Energy Engineering and Physics, Medical Radiation Engineering Group, Amirkabir University of Technology, Tehran, Iran.
چکیده
Introduction: This study conducted a clinical accuracy analysis of Synchrony Respiratory Tracking System across different CyberKnife generations (G3, G4, VSI, and M6) to provide comprehensive comparing across different generations. Additionally, appropriate regression models were developed to explain the behavior of standard deviation (SD) of the errors (correlation and prediction) and tumor motion in each region.
Material and Methods: The clinical log data was analyzed to assess the correlation and prediction errors. A retrospective analysis was conducted on 46 patients with thoracic or abdominal cancers treated using the CyberKnife G3. Furthermore, the F-test, P-value, and R2 analysis were applied to model the SD of correlation and prediction errors as a function of tumor displacements across five lung regions and two abdomen regions.
Results: Using a systematic approach, linear, quadratic, cubic, or piecewise regression models were proposed for SD of the errors across tumor displacement. The estimated radial Synchrony error (mean±SD) for the CyberKnife G3, G4, VSI, and M6 was 2.60±0.93 mm, 2.00±0.60 mm, 1.79±1.16 mm, and 0.66±0.23 mm, respectively.
Conclusion: The results indicate that correlation error remains predominant in both lung and abdominal regions across all CyberKnife generations. However, prediction error has been significantly reduced in the G4, VSI, and M6 systems. This improvement is attributed to the newer generations incorporating a combination of historical pattern-matching filters and least-mean-square filters. Error modeling based on tumor motion in different regions reveals a linear relationship between errors and target amplitude in the lung region, while the liver and pancreas regions exhibit non-linear relationships.
کلیدواژه‌ها
Respiratory Tracking System؛ CyberKnife؛ Radiotherapy Setup Errors؛ Stereotactic Body Radiation Therapy
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