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(2017)
White Paper IQM Signal reproducibility
Mohammad Islam, B. Norrlinger, J. Smale, R. Heaton, D. Galbraith, C. Fan, D. Jaffray (2009)
An integral quality monitoring system for real-time verification of intensity modulated radiation therapy.Medical physics, 36 12
Jina Chang, R. Heaton, R. Mahon, B. Norrlinger, D. Jaffray, Young-Bin Cho, Mohammad Islam (2013)
A method for online verification of adapted fields using an independent dose monitor.Medical physics, 40 7
D. Hoffman, E. Chung, C. Hess, R. Stern, S. Benedict (2016)
Characterization and evaluation of an integrated quality monitoring system for online quality assurance of external beam radiation therapyJournal of Applied Clinical Medical Physics, 18
Johannes Thoelking, J. Fleckenstein, Y. Sekar, Ramesh Boggula, F. Lohr, F. Wenz, H. Wertz (2016)
Patient-specific online dose verification based on transmission detector measurements.Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology, 119 2
J. Wong, I. Fuduli, M. Carolan, M. Petasecca, M. Lerch, V. Perevertaylo, P. Metcalfe, A. Rosenfeld (2012)
Characterization of a novel two dimensional diode array the "magic plate" as a radiation detector for radiation therapy treatment.Medical physics, 39 5
M. Stevens, D. Parsons, J. Robar (2017)
Patient specific methods for room‐mounted x‐ray imagers for monoscopic/stereoscopic prostate motion monitoringJournal of Applied Clinical Medical Physics, 18
B. Casar, M. Pasler, S. Wegener, D. Hoffman, C. Talamonti, J. Qian, I. Méndez, D. Brojan, B. Perrin, M. Kusters, R. Canters, S. Pallotta, P. Peterlin (2017)
Influence of the Integral Quality Monitor transmission detector on high energy photon beams: A multi-centre study.Zeitschrift fur medizinische Physik, 27 3
S. Riley, T. Matzen, A. Carver (2011)
SU‐E‐T‐209: Testing of Prototype Delta4AT Diode Array for In‐Vivo Radiotherapy DosimetryMedical Physics, 38
B. Nelms, H. Zhen, W. Tomé (2011)
Per-beam, planar IMRT QA passing rates do not predict clinically relevant patient dose errors.Medical physics, 38 2
Purpose This study aimed to test the sensitivity of a transmission detector for online dose monitoring of intensity-modu- lated radiation therapy (IMRT) for detecting small delivery errors. Furthermore, the correlation of changes in detector output induced by small delivery errors with other metrics commonly employed to quantify the deviations between calculated and delivered dose distributions was investigated. Methods Transmission detector measurements were performed at three institutions. Seven types of errors were induced in nine clinical step-and-shoot (S&S) IMRT plans by modifying the number of monitor units (MU) and introducing small deviations in leaf positions. Signal reproducibility was investigated for short- and long-term stability. Calculated dose distributions were compared in terms of γ passing rates and dose–volume histogram (DVH) metrics (e.g., D ,D ,V ). mean x% x% The correlation between detector signal variations, γ passing rates, and DVH parameters was investigated. Results Both short- and long-term reproducibility was within 1%. Dose variations down to 1 MU (signal 1.1 ± 0.4%) as well as changes in field size and positions down to 1 mm (signal 2.6 ± 1.0%) were detected, thus indicating high error-detection sensitivity. A moderate correlation of detector signal was observed with γ passing rates (R = 0.57–0.70),
Strahlentherapie und Onkologie – Springer Journals
Published: Dec 18, 2017
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