Patent ID: 9295440
Filing Date: 2016-03-29
CPC Classification: A61B

Claim Text:
1. A method for recording and displaying at least two 3D subtraction image data records consisting of a native 3D image data record and a 3D image data record recorded following an administration of a contrast agent, wherein the at least two 3D subtraction image data records display at least a part of a vascular system of a patient, using a C-arm x-ray apparatus, wherein the 3D image data records are obtained from a predetermined number of two-dimensional projection image data records, comprising: implementing a mask run by recording a predetermined number of mask run two-dimensional projection image data records with a rotation angle of at least 180° plus fan angle plus an additional angle, implementing a filler run following administration of a contrast agent by recording a predetermined number of filler run two-dimensional projection image data records at the same angular positions of the mask run, generating two-dimensional subtraction images by subtracting data of the mask run two-dimensional projection image data records from data of the filler run two-dimensional projection image data records, generating at least two 3D subtraction image data record each by reconstructing a set of the two-dimensional subtraction images, and displaying the at least two 3D subtraction image data records on a display apparatus, wherein the additional angle is set depending on the predetermined number of two-dimensional projection image data records to be recorded minus a minimal number of two-dimensional projection image data records, wherein the minimal number of two-dimensional projection image data records is recorded in a rotation angle of at least 180° plus the fan angle, and wherein the at least two 3D subtraction image data record are generated for separately mapping an arterial phase and an venous phase of the vascular system of the patient.