Molecular Imaging 2017

With respect to the following regarding MRI of rectal cancer, which is correct?

A. MRI tumour regression grading (TRG) has prognostic value B. MRI TRG 4 is a good response to therapy C. The presence of rectal wall diffusion signal is indicative of residual tumour D. Colonoscopic confirmation is not required if MRI indicates complete response E. Fibrosis demonstrates high T2 signal

33%

27%

17% 17%

7%

A.

B.

C.

D.

E.