Publications
The IQM System has been thoroughly evaluated by some of the world's leading radiation therapy centers.
Select your topic of interest from 15 articles, 19 posters,
19 presentations and 3 technical white papers.
Enhancing quality assurance in hybrid DCAT plans: The impact of reduced maximum dose rate
Author:
Kollotzek, S., et al, Universitätsklinik für Strahlentherapie-Radioonkologie, Medizinische Universität Innsbruck, Austria
Summary:
The goal of this project is to evaluate the accuracy of dose delivery for hybrid DCAT plans under different conditions, with a focus on how adjusting the linac’s maximum dose rate impacts the alignment between planned and delivered doses.
Implementation of a gantry mounted ion chamber for the machine QA and clinical routine
Author:
R. Nachtigall, et al, Strahlenzentrum Hamburg MVZ, Germany
Summary:
The purpose of this project is to evaluate if the IQM is a reliable alternative to the phantom based patient plan verification offering the possibility to shift the QA to the first treatment fraction.
Optimisation of Elements beam model and IQM dose calculation model for single isocentre multiple brainmets patient specific dosimetry
Author:
M. Chandrasekaran1, et al, University Hospital Southampton (UK)
Summary:
This study aimed to find the best fit Elements multi leaf collimator (MLC) parameters and improve the accuracy of the IQM dose calculation model for single isocentre treatment for
multiple brainmets (MBM) and patient specific dosimetry (PSD) for Elekta Agility Versa HD linac.
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Comparison of pre-treatment VMAT QA between IQM and Varian Portal Dosimetry
Author:
Melissa Ghafarian, et al, Vanderbilt University Medical Center, Nashville, USA
Summary:
The purpose of this study was to compare pre-treatment VMAT QA measurements and evaluate the MLC error sensitivity of two detectors: the IQM System and the Varian Portal Dosimetry System.
Combined use of IQM and an EPID-Based In Vivo Dose Monitoring System
Author:
Cinzia Talamonti, et al, University of Florence (Italy)
Summary:
Evaluation of the combined use of the IQM system and SoftDiso portal dosimetry software, for in vivo dose monitoring by simultaneous detection of delivery and patient setup errors in whole breast irradiation. The combined use of the IQM and SoftDiso allows for fast identification of both delivery and setup errors and substantially reduces the impact of error identification and correction on the treatment workflow.
Error detection capability of a novel transmission detector: a validation study for online VMAT monitoring
The purpose of this study by Pasler, Marazzo, et al was to characterize a new single large-area ionization chamber for online and real-time beam monitoring.
Evaluation of the signal response with the EPID and the IQM for SBRT QA
Author:
Adam Harpley, et al, Vanderbilt University Medical Center, Nashville (USA)
Summary:
The clinical physics group introduced a variety of clinically significant treatment delivery errors into 8 retrospective SBRT plans and compared the error sensitivity of IQM to their Varian Portal Dosimetry system.
Evaluation of the IQM for 4MV x-ray beam
Author:
Haruna Yokoyama, et al, Kanazawa University (Japan)
Summary:
The clinical physics group introduced a variety of clinically significant treatment delivery errors into 6 different treatment techniques (3x 3DCRT, 1x IMRT and 2x VMAT) all utilizing 4MV treatment beams.
They concluded that IQM was more sensitive to the MLC errors than the conventional QA method. IQM was also able to detect the systematic open/close leaf position and leaf shift errors in all the modified plans. They stated that IQM was even able to detect single leaf shifts within an otherwise correct field size and shape.
Optimization of DLG and MLC transmission factors
Author:
Stephen Martinez, et al, Vanderbilt University Medical Center, Nashville (USA)
Summary:
The clinical physics group aimed to compare the capability of the iQM system for optimizing MLC model specific parameters: Dynamic Leaf Gap and Transmission Factor to a IBA MatriXX spatial array. IQM shows a VERY small variation in the measured results and is able to clearly determine the best match of the minimum percent absolute error between predicted and measured signal. Download the poster to learn that IQM facilitated a higher resolution (0.01 mm) measurement than was possible with MatriXX..
One year clinical experience with the IQM
Author:
Marlies Pasler, Lake Constance Radiation Oncology, Singen-Friedrichshafen (Germany)
Summary:
Download the full presentation summarizing the first year’s clinical experience of using IQM for online QA during every single treatment fraction.. This presentation was given by Marlies Pasler, PhD at the ASTRO 2019 Annual Meeting in Chicago, IL
Plan QA with IQM (German)
Author:
Sonja Wegener, et al, Unversity Clinic Wurzburg (Germany)
Summary:
Clinical experience using IQM for VMAT Plan QA.
Sensitivity evaluation of two QA system to organ-dose variation of VMAT plans
Author:
Oluwaseyi M. Oderinde, et al, University of the Free State, Bloemfontein (South Africa)
Summary:
Assess the dose variation sensitivity of two quality assurance (QA) devices (IQM and MatriXXEvolution)
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