Fig. 3
A 52-year-old female with moderately differentiated adenocarcinoma (T1 stage). a Axial high resolution T2WI shows the tumour of the posterior rectal wall (arrow). b Diffusion-weighted image at b = 1000 s/mm2. c-e The ADC map shows the lesion with a low-signal-intensity (arrow) at b = 0, 1000 s/mm2, the mean ADC value of the lesion is 1.409 × 10− 3 mm2/s (c). 100, 1000, 1500 s/mm2, the mean ADC value is 1.042 × 10− 3 mm2/s (d). 500, 1500, 2000 s/mm2, the mean ADC value is 0.675 × 10− 3 mm2/s (e). f Postoperative pathology (haematoxylin and eosin, × 1). Tumour cells invaded the submucosa