Should ITV be an expansion from GTV or CTV?

There are many definitions in our field and in oncology in general that are not followed. Borderline resectable pancreatic cancer comes to mind. It has a very clearly defined definition and is almost never followed. Other variables are much more important, such as simulation, imaging, accuracy of co...

I use the iGTV approach when treating lung cancer. I first contour the GTV on the MeanIP (also called the "average") reconstruction scan. My residents always ask, "Is this even a necessary step?"... and yes, by starting with the average scan, I get a good "feel" for where the tumor is before proceed...

Very important question, and one whose consequences are often overlooked, particularly that the ideal execution is frequently labor-intensive.

A geometrically overestimated ITV volume, with the increment further amplified by PTV margins, might lead to an unnecessary increase in adverse events witho...