Figure 2a:

Ex vivo MR imaging and colocalization of ¹⁹F signals with adenoma and inflammatory sites. (a) Sagittal MR image of an excised descending colon. Note the adenoma growth (arrow) from a ¹⁹F-positive inflammatory site. (b) Representative axial merged ¹H and ¹⁹F MR images of the descending (top) and ascending (bottom) colon fixed in 4% paraformaldehyde. (c) Gross comparison of excised descending colon (left) and corresponding MR image (right). Red and blue boxes indicate two adenomas with corresponding gross and MR images (¹⁹F signal intensity). (d) Axial ex vivo MR images of the descending colon (left) were compared with corresponding hematoxylin-eosin–stained slices (middle, right). Colocalization of ¹⁹F signal intensity with either an adenoma (red box) or an inflammatory site (blue box) can be observed (scale bar = 500 μm and 300 μm for lower and higher magnifications, respectively).