Please select the option that best describes you:
Topics:
Radiation Oncology • Thoracic Malignancies
How do you approach contouring of the ITV for lung SBRT?
Do you use the MIP to generate an ITV, contoured on the average scan, or do you contour on each time phase of the 4DCT and boolean the results together to generate the ITV, or something different?
Answer from: Radiation Oncologist at Community Practice
For tumors sitting in the middle of the lung and not near any other moving structures with similar Hounsfield units like mediastinum, larger vessels, chest wall, or diaphragm, then maximum intensity projection is a good place to start (verified with 4D video afterwards). If there is contact with oth...
Sign in or Register to read more
Answer from: Radiation Oncologist at Community Practice
Usually something different. A multiply-fused slow CT approach is functionally equivalent to "contour[ing] on each time phase of the 4DCT and boolean[ing] the results together to generate the ITV" (I've confirmed to my own satisfaction), but it doesn't require the technology necessary to measure res...