Perirenal fat area is a preoperative predictor of hypertension resolution after laparoscopic sleeve gastrectomy: Generalized additive models

Figure 1 The schematic diagram for measuring the perirenal fat area and perirenal fat thickness. A: At the level of the left renal vein, the computed tomography window width was adjusted to 150 HU, and the window level was adjusted to -120 HU; B: The blue line represents the boundary line of perirenal fat area, and the yellow line represents the length of perirenal fat thickness.