Target Volume Determination 2016

CT versus MR

MR: BETTER CONTRAST RESOLUTION OF SOFT TISSUES

•Outer rectum contours overlap

nicely

•Bladder contours show only

slight deviations

•The high risk clinical target

volume contour highlights the

difference in lateral extension

seen between CT and MR-

imaging and reveals difficulty in

accurately assessing the lateral

dimension.

Viswanathan A.N... et al., Int. J. Radiation Oncology Biol. Phys., 68, 491–498, 2007