Circuit arrangement for counting x-ray radiation x-ray quanta by way of quanta-counting detectors, and also an application-specific integrated circuit and an emitter-detector system

Abstract

A circuit arrangement of a quanta-counting detector with a multiplicity of detector elements is disclosed, wherein the X-ray quanta registered in each detector element generate a signal profile. In at least one embodiment, the circuit arrangement, in each detector element, includes: at least one first comparator with a first energy threshold lying in the energy range of the measured X-ray quanta and at least one second comparator with a second energy threshold lying above the energy range of the measured X-ray quanta, the at least one first and second comparators being connected to the detector element. Further, the at least two comparators have a logical interconnection, wherein at least a first comparator and a second comparator are connected to the inputs of an XOR gate, and each XOR gate connected to a first comparator is connected to precisely one edge-sensitive counter. Further, in at least one embodiment, an application-specific integrated circuit (ASIC) and an emitter-detector system of an X-ray CT system, including at least one circuit arrangement, are disclosed.

Description

technical field [0001] The invention relates to a circuit arrangement for counting x-ray quanta of x-ray radiation in a detector element of a detector in a radiator-detector system of an x-ray CT system, wherein the x-ray radiation comprises a plurality of X-ray quanta of energy, and the x-ray quanta collected by each detector element generate signal histories with voltage pulses of different heights related to the energy of the x-ray quanta, said signal histories may overlap, the invention also relates to a An application specific integrated circuit and a radiator-detector system. Background technique [0002] Conventional X-ray systems are generally known. It is used, for example, in medicine to carry out x-ray examinations of patients. Depending on the body part or tissue to be examined, different x-ray radiation energies are required in order to penetrate tissues of different densities, for example adipose tissue or bone. The energy of the x-ray radiation is decisive ...

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Problems solved by technology

The data from these regions are then no longer proportional to the flow velocity and thus lead to undesired artifacts in the resulting image reconstruction and in the worst case cannot be used

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