Patent ID: 7856080
Filing Date: 2010-12-21
Classification: A61B

Abstract:
1. A method for determining a defined position of a C-arm computed tomography system couch that a patient rests upon, and with the position of the C-arm being determined such that, once the couch has been brought to the defined position, a series of x-ray images are captured for which, between the capture of the individual x-ray images, a C-arm of the C-arm computed tomography system is rotated about an isocenter, comprising: receiving an input via the C-arm computed tomography system that initiates at least one x-ray image recording by the C-arm computed tomography system; performing x-ray image recording steps by the C-arm computed tomography system to receive x-ray image data of the patient resting on the couch; receiving an image data set of the patient captured in advance by an imaging system that differs from the C-arm computed tomography system, where an area of interest of the patient is selected; registering the image data set captured by the different imaging system with the x-ray image data received by the C-arm computed tomography system for creating a relationship between the area of interest in the image data set and in the x-ray image data; calculating the defined position, relative to the couch, of a point that is to coincide with the isocenter for rotation of the C-arm based on the registration; and deriving at least one coordinate defining the position of the couch from the calculation.