1. A method for determining a damage characteristic value of a kidney, wherein images comprising the kidney and the renal artery obtained by a three-dimensional digital subtraction angiography scan carried out with administration of contrast agent at a proximal end of the renal artery and comprising a fill run and a mask run are inputs, the method comprising: determining a parenchymal blood volume, wherein a subtraction from images of the fill run and the mask run of the three-dimensional digital subtraction angiography is input into the parenchymal blood volume, additionally determining an arterial input function and normalizing the parenchymal blood volume using the arterial input function; segmenting the kidney, determining an average normalized parenchymal blood volume value, and determining a total value of the parenchymal blood volume into which the normalized parenchymal blood volume values of the segmented kidney are input; receiving an average normalized parenchymal blood volume normal value, a total normal value of a parenchymal blood volume, or a combination thereof, and determining at least one damage characteristic value of the kidney into which the average normalized parenchymal blood volume value and the average normalized parenchymal blood volume normal value, the total value of the parenchymal blood volume and the total normal value of a parenchymal blood volume, or a combination thereof are input; and outputting the at least one damage characteristic value of the kidney.