| 摘要 |
The invention relates to a method for producing a digital volume model (40) of a body volume (30) by means of a sensor device (12), which sensor device (12) comprises a plurality of radiation sensors (18), of which each produces a pixel value in a projection. In order to produce the volume model (40), a plurality of projections from different projection angles (a) are produced and the volume model (40) is computed from sensor positions of the radiation sensors (18) and pixel values of the radiation sensors, wherein for at least one projection angle (a), the sensor positions are corrected by means of a respective correction vector for rigid motion compensation. The problem addressed by the invention is that of also compensating the non-rigid motion of the body volume, i.e., the deformation, in the computation of the volume model (40). This problem is solved in that, in order to correct the sensor positions, the projection surface (22) provided by the totality of the radiation sensors (18) is divided into a plurality of sub-surfaces and a separate correction vector is determined for each of the sub-surfaces independently of each other. |
