METHOD FOR RECORDING A TOMOSYNTHESIS DATA SET WITH AN X-RAY DEVICE, AND X-RAY DEVICE

摘要

A method records a tomosynthesis data set of a breast of a patient with an X-ray device. The device contains an X-ray detector for the support of the breast, a compression plate for the breast and being parallel to the X-ray detector, and an X-ray source, which is movable in a basic angle interval around a central position, in which the midperpendicular of the detector area corresponds to the central ray of the X-ray source. The tomosynthesis data set is reconstructed from projection images recorded at different projection angles over a recording interval. A recording angle interval that is asymmetrical relative to the central position is used in the case of an asymmetrically positioned breast, in particular for an MLO view.

主权项

1. A method for recording a tomosynthesis data set of a breast of a patient with an X-ray device having an X-ray detector for supporting the breast, a compression plate for the breast, the compression plate being disposed parallel to the X-ray detector, and an X-ray source being movable in a basic angle interval around a central position, in which a mid-perpendicular of a detector area corresponds to a central ray of the X-ray source, for recording projection images at different projection angles into different angular positions, which comprises the steps of:
reconstructing the tomosynthesis data set from the projection images recorded at the different projection angles over a recording interval; and using a recording angle interval being asymmetrical relative to the central position in a case of an asymmetrically positioned breast, in that on a side in a plane of a movement of the X-ray source from which the breast projects into an interspace between the compression plate and the X-ray detector, a larger angular distance of an outermost projection angle of the recording angle interval with respect to the central position is chosen compared with on an opposite side.