Table 2.

Patient‐specific QA (IMRT QA): verification of delivered dose.

Questions	Available answers
Which of the following treatment modalities does you institution use? (Check all that apply)	Routine IMRT (Sliding Window, Step and Shoot, Tomotherapy etc.) VMAT/Rapid Arc
What are your standard tool(s) for verifying that the treatment unit delivers the planned dose for individual patients? (Choose all that apply.)	Point(s) Measurement Film 2D Diode array 2D Ion Chamber array EPID 2.D (pseudo 3D) array/multi‐plane array 3D dosimeter Other
When you make QA measurements, which of the following do you most commonly do?	Deliver beams at the same fixed gantry angle Deliver at the planned gantry angle
Do you mount your detector on the gantry?	Yes No
Are your plans usually assessed for pass or fail based on:	Each field‐by‐field measurement Composite measurement (all fields)
How do you assess agreement (select all that apply), and what are your most commonly used comparison criteria?	Point Dose Planar 3D/Volumetric analysis
Do you do routine in‐vivo dosimetry for IMRT patients?	Yes No
If your QA does not meet your passing criteria, what actions do you take? (choose all that apply, rank in order of attempt (1 denotes first strategy))	Remeasure with the same setup (at the same point/plane) Move to a new calculation point/plane and remeasure Try fixed gantry angle delivery Re‐plan Scale the MU's (partially or fully) Change the passing criteria for the case Analyze in relative dose mode instead of absolute dose mode Document result and deliver the plan Something else: __________