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Program Information

IGRT Credentialing in NCTN Trials

J Lowenstein

J Lowenstein1*, A Molineu1 , H Al-Hallaq2 , M Matuszak3 , T Craig4 , K Ulin5 , Y Xiao6 , F Yin7 , D Followill1 , (1) UT MD Anderson Cancer Center, Houston, TX, (2) The University of Chicago, Chicago, IL, (3) University of Michigan, Ann Arbor, MI, (4) The Princess Margaret Cancer Centre - UHN, Toronto, ON, (5) UMass Medical Center, Lincoln, RI, (6) University of Pennsylvania, Philadelphia, PA, (7) Duke University Medical Center, Durham, NC


SU-F-J-49 (Sunday, July 31, 2016) 3:00 PM - 6:00 PM Room: Exhibit Hall


To make Image Guided Radiation Therapy (IGRT) credentialing a more unified, consistent and efficient process across the entire National Clinical Trial Network (NCTN).


IGRT plays a role in several advanced NCTN trials. Previously an institution had to be IGRT credentialed for each protocol. When institutions were allowed to use previous credentials for new protocols it was limited to the same disease site as the original credentialing. The credentialing was analyzed by the physics PI of the protocol. We consulted with several of these physicists to determine what is important to consider when reviewing submissions and to learn ways to apply credentialing more broadly.


For trials open in 2016, IGRT credentialing can be simplified to cover either boney anatomy or soft tissue. This revised credentialing will cover all disease sites based on the type of anatomy, unless otherwise stated within the protocol. Institutions will submit will complete an online questionnaire about their IGRT procedures. Boney anatomy requirements will include submission of data from 2 sequential fraction of both a patient aligned with boney anatomy and pelvic patient. Soft tissue will require similar submissions for a patient aligned using soft tissue and a pelvic patient. Institutions will only be required to submit the pelvic patient once. Data should be in DICOM format and includes planning CT set, RT structure set, RT plan file, RT dose file, localization images and spatial registration file (if available). Reviews will be done by IROC-Houston staff who will continue to provide feedback to the sites.


This revised IGRT credentialing process will bring consistency, a savings in time and effort for both the IROC Houston QA office and to those institutions wanting to be credentialed to participate in NCTN Trials.

Funding Support, Disclosures, and Conflict of Interest: Sponsored by NIH/NCI CA10953

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