X-ray diagnostics installation having means for forming a transparency signal
AssigneeSiemens Aktiengesellschaft
InventorsHorst Aichinger, Karlheinz Koehler
Life of this patent
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Abstract
In an x-ray diagnostics installation for mammography, an automatic setting of the optimum beam quality ensues in combination with transparency matching. A set of exposure parameters corresponding to different thicknesses of the examination subject is stored in a memory (reference values). At the beginning of an x-ray exposure, a comparator compares the transparency signal (actual value) to the exposure parameters (reference value) interrogated from the memory dependent on the current thickness of the examination subject, and influences the x-ray tube voltage for the purpose of a rated/actual value comparison without interrupting the exposure.
Claims1
An x-ray diagnostics installation comprising:
- means, including an x-ray tube operating at an x-ray tube voltage, for forming a transparency signal of an examination subject and for thereafter conducting an x-ray exposure of said examiner subject;
- memory means for storing a set of exposure parameters corresponding to different examination subject thicknesses;
- means for interrogating said memory means;
- comparator means for, at a beginning of an x-ray exposure, comparing said transparency signal to said sets of exposure perameters interrogated from said memory means dependant on the thickness of said examination subject for selecting a set of exposure perameters best matched to said thickness of said examination subject;
- and
- means for adjusting said x-ray tube voltage to correspond to the selected set of perameters without interrupting said x-ray exposure.
Dependencies are inferred from the claim text.