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Fig. 9 | Insights into Imaging

Fig. 9

From: Response evaluation after neoadjuvant treatment for rectal cancer using modern MR imaging: a pictorial review

Fig. 9

Susceptibility artifacts on DWI. Pre-treatment T2-weighted MRI (a), post-CRT T2-weighted (b), and post-CRT b1000 diffusion-weighted (c) images of a female patient treated for a low rectal tumor (arrows in a). On the post-CR images, a large amount of gas is present within the rectal lumen, which causes an artificial pile-up of signal projecting over the dorsal rectal wall at the site of the previous tumor bed (arrowheads in b and c). If not recognized as an artifact, this signal may be falsely interpreted as tumor

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