Generation of artificial contrast-enhanced radiological images

A computer system comprising:

• a receiving unit;
• a control and calculation unit;
• and
• an output unit,
• wherein the control and calculation unit is configured to:
• to cause the receiving unit to receive a first representation or to generate the first representation, wherein the first representation represents an examination region of an examination object without contrast agent or after administration of an initial amount of a contrast agent in real space or in frequency space;
• cause the receiving unit to receive a second representation, wherein the second representation represents the examination region of the examination object after an administration of a second amount of the contrast agent in real space or in frequency space;
• generate a third representation based on the first representation and the second representation, wherein the generation of the third representation comprises a subtraction of the first representation from the second representation;
• on the basis of the third representation, generate a weighted third representation by frequency-dependent weighting of the third representation;
• generate a fourth representation, wherein the generation of the fourth representation comprises an α-fold addition of the third representation to the first representation or to the second representation, wherein α is a positive or negative real number;
• transform the fourth representation into a representation of the examination region in real space, when the fourth representation represents the examination region in frequency space;
• and
• cause the output unit to output the fourth representation of the examination region in real space and/or to store the fourth representation and/or to transmit the fourth representation to a separate computer system.

A computer program product comprising a data carrier on which is stored a computer program that can be loaded into a working memory of a computer system, wherein the computer program causes the computer system to execute the following steps:

• receive or generate a first representation, wherein the first representation represents an examination region of an examination object without contrast agent or after administration of a first amount of a contrast agent in real space or in frequency space;
• receive or generate a second representation, wherein the second representation represents the examination region of the examination object after an administration of a second amount of the contrast agent in real space or in frequency space;
• generate a third representation, wherein the generation of the third representation comprises a subtraction of the first representation from the second representation;
• generate a weighted third representation, wherein the generation of the weighted third representation comprises a frequency-dependent weighting of the third representation;
• generate a fourth representation, wherein the generation of the fourth representation comprises an α-fold addition of the optionally-weighted third representation to the first representation or to the second representation, wherein α is a positive or negative real number;
• if the fourth representation represents the examination region in frequency space:
• transform the fourth representation into a fourth representation of the examination region in real space;
• and
• output and/or store the fourth representation of the examination region in real space and/or transmit the fourth representation of the examination region in real space to a separate computer system.