Publication Category: Error Sensitivity

Real-time beam monitoring for error detection in IMRT plans and impact on DVH

Author: Livia Marrazzo, et al, Multi-centre study of 3 RT departments Summary: This article shows the ability of detecting small delivery errors with a transmission detector for online monitoring of Intensity Modulated Radiation Therapy (IMRT) treatments. The authors also show how the IQM signal deviations strongly correlate with changes in the dose-volume-histogram for the PTV …

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Error detection capability of IQM: an validation study for online VMAT monitoring

Author: Marlies Pasler, Livia Marrazzo, et al, Lake Constance Radiation Oncology Center, Friedrichshafen (Germany) and University of Florence (Italy) Summary: Deviations in dose distributions between the original and error-induced plans were compared in terms of detector signal deviation, dose-volume histogram (DVH) metrics and 2D γ-evaluation.

Real-time verification of VMAT delivery

Author: Makan Farrokhkish, et al, Princess Margaret Cancer Centre, Toronto (Canada) Summary: Evaluation of the IQM beam monitoring performance to assess the accuracy and reproducibility of the linac beam delivery. The signal calculation accuracy and measurement reproducibility as well as the error detection capability of the IQM System was evaluated. For this study the author …

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IMRT Plan QA with IQM

Author: Sonja Wegener, et al, Unversity Clinic Wurzburg (Germany) Summary: Evaluation of the IQM System for IMRT plan QA. The IQM Calculation algorithm has been validated for a wide spectrum of clinical IMRT cases. The error sensitivity of the IQM System has been tested with a variety of induced errors. The error detection capability of …

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Online Dosimetry with IQM

Author: Kilian Michel, Lake Constance Radiation Oncology Center, Singen-Friedrichshafen (Germany) Summary: Evaluation of the IQM System for Online Dosimetry during the patient treatment. The long-term signal stability, the error detection sensitivity for induced errors, the correlation of the IQM and the Dose-Volume-Histogram as well as treatment plan verification with the IQM System has been evaluated.

Pre-clinical tests of the IQM system

Author: Marlies Pasler, Lake Constance Radiation Oncology Center, Friedrichshafen (Germany) Summary: Evaluation of the potential of the IQM System to catch errors before they become clinically relevant. They also checked if IQM would help them to improve the efficiency of their processes and finally they checked if IQM would replace their current pre-treatment QA. They …

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Delivery errors detectability

Author: Livia Marrazzo, et al, University of Florence, AOU Careggi Florence (Italy) Summary: Evaluate the correlation between the changes in the detector output signal induced by small delivery errors with other metrics, such as the γ passing rate and the DVH variations. The authors concluded that IQM is capable of detecting small delivery errors and …

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