Association between Quantitative Classification of Renal Surface Nodularity and Early Renal Injury in Patients with Arterial Hypertension

Figure 2

In threshold mode (ITK SNAP), the lower threshold and upper threshold were 20 and 300, respectively, and then an aspherical bubble was placed within the renal parenchyma on CT images. The regional competition force and smoothing force were 0.900 and 0.300, respectively, to automatically segment the left kidney (red area). Three layers of images (15 mm in thickness) at the upper and lower poles of the left kidney were then removed. 3D images of the kidney were generated. Afterwards, the renal pelvis was clipped. Finally, the data were gridded [15].