Magnetic resonance imaging for prostate bed radiotherapy planning: An inter‐ and intra‐observer variability study

Abstract

We found less inter-observer variability when contouring on CT than on MRI. Radiation Therapy Oncology Group contouring guidelines are based on anatomical landmarks readily visible on CT. These landmarks are more inter-observer dependent on MRI. Therefore, present contouring guidelines might not be applicable to MRI planning.