The Johns Hopkins Hospital, Baltimore
In April 2014 iRT Systems installed the first pre-clinical prototype version of the IQM System at JHU.
Address401 North BroadwayCityBaltimore, MD 21287, USAMain ContactDr. John WongEmailinfo@i-rt.de for detailsPhoneinfo@i-rt.de for detailsWebpagewww.hopkinsmedicine.orgLinac13 (10 Elekta, 1 Accuray Cyberknife, 2 Tomotherapy)TPSPhilips PinnacleInstall. Date2014-05-20IQM tested onElekta Infinity (Agility collimator)IQM related publications This article discusses the influence of the Integral Quality Monitor (IQM) transmission detector on photon beam properties. The authors evaluated data acquired at nine different Radiation Therapy centers and concluded that the magnitudes of changes observed justify treating IQM either as energy-specific tray factors in the treatment planning system or alternatively as a set of modified output factors for each linac energy. Download this article for some valuable guidance for implementing the IQM System into your clinical routine. Lan Lin, Medical Physicist at Johns Hopkins University evaluated the accuracy,sensitivity and constancy of the IQM for conventional intensity modulated radiationtherapy (IMRT) and for rotational volumetric modulated arc therapy (VMAT). Download the complete poster that was shown.at the AAPM 2015 Meeting in Anaheim, CA. Jianguo Qian from the Johns Hopkins University, Baltimore draws the preliminary conclusion that IQM is a stable dosimetric system and can detect dosimetric deviations caused by small leaf errors in stereotactic radiation therapy. The sensitivity to leaf errors was demonstrated to be more pronounced for relatively small fields (i.e., small targets) in SBRT. IQM appears to be more sensitive than Mapcheck2 to small leaf errors in SBRT of small targets while showing similar sensitivity in SBRT of relatively large targets. Download the complete poster that was shown at the ASTRO 57 meeting in San Antonio, Texas.
Influence of the Integral Quality Monitor transmission detector on high energy photon beams: A multi-centre study
In Vivo Dosimetry of Conventional and Rotational Intensity Modulated Radiotherapy Using Integral Quality Monitor (IQM)
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In-Vivo Dosimetry of Stereotactic Radiation Therapy using the IQM System
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An intriguing device...
John Wong, Ph.D. Head of Radiation Oncology Physics, Johns Hopkins University, Baltimore, USA
"This allows everyone to stay ahead of the game of QA."
Stanley Benedict, Ph.D. Professor & Vice Chair of Clinical Physics, Department of Radiation Oncology, University of California at Davis Comprehensive Cancer Center, USA
"IQM constitutes a paradigm shift in treatment verification..."
David Jaffray, Ph.D. Head of Radiation Physics Department, Princess Margaret Cancer Centre, Toronto, Canada
"The best idea I have seen in years..."
Uwe Götz, Medical Physicist, St. Vincenz Krankenhaus, Limburg, Germany
"A physics tool for the independent verification of the final beam product."
Robert Heaton, Ph.D. Medical Physicist, University of Toronto, Canada
"Measuring with IQM is a piece of cake..."
Lan Lin Ph.D. Medical Physicist, Johns Hopkins Group, Washington, D.C., USA
"I see endless possibilities..."
Henk Huizenga, Ph.D. Head of Radiation Oncology Physics, Radboud University Nijmegen, The Netherlands
"The IQM System is a highly sensitive dose monitoring device.”
Stefania Pallotta, Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, Florence, Italy
"IQM is an especially good candidate for monitoring small fields due to its unique detector design"
David Hoffman, Ph.D., Medical Physicist, University of California San Diego, USA
"Why didn't anybody think of this before?"
A sentence that we hear during almost every presentation.
"Our study demonstrates clinically negligible changesin beam quality and surface dose for all investigated beams.”
Bozidar Casar, Ph.D., Medical Physicist, Institute of Oncology Ljubljana, Slovenia
"The results of our study demonstrate the clear and consistent correlation of the IQM signal with DVH metrics.”
Livia Marrazzo, Medical Physic Unit, Careggi University Hospital, Florence, Italy
"IQM is a key component of our automated treatment quality control and allows us to fully comply with the requirements defined in the 2013/59/EURATOM directive."
Holger Wirtz, Lake Constance Radiation Oncology Center, Singen-Friedrichshafen, Germany
"The quick setup and fully automated handling of all clinical data significantly reduces the time we need for Plan QA. Our clinical evaluation has shown that the error detection capability of the IQM System is at least as good, and in many cases even better, than with conventional 3D phantoms."
Otto Sauer, Ph.D., Head of Medical Physics, University of Würzburg, Würzburg, Germany