Radiology
All radiological measurements were performed by the same
radiologist(MK). Perirenal fat thickness was measured at the level of
the renal vein, from the posterior renal capsule to the posterior
abdominal wall using CT images. These measurements from CT images are
referred to as perirenal fat depth to eliminate confusion. The perirenal
field Hounsfield unit(HU) and subcutaneous fat HU(at the level of the
hilus) were recorded according to a circular region of interest
measuring 1 cm in diameter, using a PACS workstation and pre-operative
CT images.