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a.-e. T2-weighted MR image before and after CRT shows that there is a visible tumor with a horseshoe shape in the rectum (arrows). The ADC, MD and MK values were 0.924×10-3 mm2/s, 1.424×10-3 mm2/s, and 0.876 before treatment. After CRT, the ADC and MD increased slightly to 0.947×10-3mm2/s and 1.533×10-3mm2/s, respectively, and the MK value decreased slightly to 0.812.
