This trial will utilize TRIAD for dosimetry digital treatment data submission. TRIAD is the American College of Radiology’s (ACR) image exchange application and it is used by the NCI. See here for information on installing TRIAD.

Please fill out the credentialing status inquiry form to let us know that you would like to be credentialed for this protocol.

In order to complete the IMRT credentialing process the following items must be completed:

• All participants are asked to complete the Facility Questionnaire.

• Irradiate the IROC Houston's H&N phantom. Please fill in the request form online.

• Successfully complete the IGRT credentialing requirements for bony alignment. Please also complete the . Note: IGRT credentialing is ONLY required for reduced margins.