**Notes/Thanks/Other declarations**

All figures (except **Figure 6**) are provided by Teneva MD from Department of Imaging Diagnostics, University Hospital St. Marina, Varna, Bulgaria.

**73**

**Author details**

Tsvetelina Teneva1

Varna, Bulgaria

Prof. Dr P. Stoyanov, Varna, Bulgaria

provided the original work is properly cited.

\*, Aleksandar Zlatarov2

3 Medical University Prof. Dr P. Stoyanov, Varna, Bulgaria

\*Address all correspondence to: tenevaz@gmail.com

1 Department of Imaging Diagnostics, Medical University Prof. Dr P. Stoyanov,

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

mrTRG magnetic resonance imaging of the tumor response tumor

2 Department of General and Operative Surgery, Medical University

and Rozen Grigorov3

*Role of Magnetic Resonance Imaging in Patients with Rectal Cancer*

*DOI: http://dx.doi.org/10.5772/intechopen.94868*

MRI magnet-resonance imaging DWI diffusion-weighted imaging

PET positron emission tomography

regression grade

pTRG histopathological tumor regression grades TEM transanal endoscopic microsurgery

EMVI extramural venous invasion CRM circumferential resection margin pCR pathological complete response

TME total mesorectal excision DFS disease-free survival OS overall survival

CT computed tomography

MRF mesorectal fascia

**Abbreviations**

US ultrasound

*Role of Magnetic Resonance Imaging in Patients with Rectal Cancer DOI: http://dx.doi.org/10.5772/intechopen.94868*
