Value of two-phase dynamic multidetector computed tomography in differential diagnosis of post-inflammatory strictures from esophageal cancer

Figure 1 Visualization of reliable region of interest. A: Regions of interest (circled red) for esophageal stenosis were drawn freehand around the thickened walls; B: Regions of interest (circled red) for the background intact esophagus were drawn around the intact esophageal wall.