1. A method ( 1 ) for determining a damage characteristic value of a kidney ( 2 ), wherein images comprising the kidney ( 2 ) and the renal artery ( 3 ) that were obtained by a three-dimensional digital subtraction angiography scan that was carried out with administration of contrast agent at the proximal end ( 4 ) of the renal artery ( 3 ) and comprises a fill run and a mask run are input into the method ( 1 ), and wherein the method ( 1 ) comprises the following method steps: S 1 ) determining a parenchymal blood volume, wherein the 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 by means of the arterial input function; S 2 ) segmenting the kidney ( 2 ) and 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 ( 2 ) are input; S 3 ) receiving an average normalized parenchymal blood volume normal value and/or a total normal value of a parenchymal blood volume, and determining at least one damage characteristic value of the kidney ( 2 ) into which the average normalized parenchymal blood volume value and the average normalized parenchymal blood volume normal value and/or the total value of the parenchymal blood volume and the total normal value of a parenchymal blood volume are input; S 4 ) outputting the at least one damage characteristic value of the kidney ( 2 ).