 Axial computed tomography image of the same patient. Three ROIs (using a circular ROI of 1 cm2) were drawn from the upper, middle and lower parts of the spleen, to assess the attenuation value of the organ by taking the average of the three HU values collected from the ROIs. Shown here is the measurement from the lower a third of the spleen (50 HU). The average attenuation value was 51 HU in the patient. By dividing the attenuation value of the pancreas with the attenuation value of the spleen, a pancreas-to-spleen attenuation ratio of 0.68 was found, which was smaller than 0.70 (cut-off ratio of pancreas-to-spleen attenuation for pancreatic steatosis), confirming the diagnosis of pancreatic steatosis in this patient.HU: Hounsfield unit; ROI: Region of interest.