**2.2 Enterography CT and MR**

Both radiological methods CT or MR Enterography have been the best noninvasive exams to evaluate the small bowel in Crohn disease. Enterography may identify affected segments, disease activity and complications (abscess and fistula). Enterography may help to differentiate inflammatory or fibrotic areas of stenosis (**Figure 4**–**6**). Stricture is defined as a bowel segment with luminal narrowing and unequivocal upstream bowel dilation (**Table 3**) [23].

**Figure 3.** *Enteroscopy showing lesions in the jejunum and normal ileum.*

*Current Elective Surgical Treatment of Inflammatory Bowel Disease DOI: http://dx.doi.org/10.5772/intechopen.100112*

#### **Figure 4.**

*Axial contrast- enhanced CT enterography: homogeneous mural hyperenhancement (long arrow) and stratified mural hyperenhacement (short arrow).*

#### **Figure 5.**

*A – Coronal T2 sequence MR enterography: homogeneous small bowel wall thickening and sacculations (arrow); B - Coronal T2 sequence MR enterography: small bowel wall thickening with stratified (bilaminar) mural hyperenhancement (arrow).*

#### **Figure 6.**

*A – Coronal T2 sequence MR enterography: homogeneous small bowel wall thickening (arrow); B - Coronal contrast-enhanced fat-suppressed T1-weighted MR enterography: small bowel wall thickening with stratified (bilaminar) mural hyperenhancement (arrow).*


*Radiological findings in CT or MR enterography in Crohn disease.*
