Research Article
Histogram Analysis of Perfusion Parameters from Dynamic Contrast-Enhanced MR Imaging with Tumor Characteristics and Therapeutic Response in Locally Advanced Rectal Cancer
Figure 2
Rectal carcinoma in a 63-year-old male patient without perineural invasion and KRAS gene mutation (-).
| (a) T2-weighted, axial image shows an ulcerofungating mass (arrow) in the left wall of the rectum. The tumor invades through the rectal wall into the perirectal fat |
| (b) ROIs were manually drawn along the edges of the tumors on T2-weighted axial images section by section at a thickness of 5 mm for the entire tumor (not shown) |
| (c) The color-coded map shows the dominant purple color in the corresponding tumor. The calculated mean value was 0.17 min−1 |
| (d) The color-coded map shows the dominant red color in the corresponding tumor. The calculated mode value was 0.002 |