A method for correcting count rate drift in a quantum-counting detector and an x-ray system

A technology of counting detectors and detectors, applied in X-ray energy spectrum distribution measurement, instruments, measuring devices, etc., can solve problems such as difficulty in accurately determining dose, image error, counting rate drift, etc.
CN102809756AActive Publication Date: 2012-12-05SIEMENS HEALTHCARE GMBH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SIEMENS HEALTHCARE GMBH
Publication Date
2012-12-05

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Abstract

The invention relates to a method, a circuit arrangement and an X-ray system, in particular a CT system (1), are disclosed wherein, in order to correct the count rate drift of a detector for ionizing radiation having quantum-counting detector elements (Dn, m) which include a combination of at least two counters (ZS1, ZS2, ZS3) with significantly different energy thresholds (S1, S2, S3), and on the basis of previously determined functional dependencies of count rates on one another and using at least one of the counters (ZS1, ZS2, ZS3) per detector element as the reference, the count rates of the respective other counters with different energy thresholds are corrected.
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Description

technical field

[0001] The invention relates to a method for correcting count rate drift in detectors of X-ray systems, in particular CT systems, with quantum counting detector elements, each detector element having at least A combination of two counters, the energy threshold is analyzed in combination for determining the incident radiation dose. Furthermore, the invention relates to an x-ray system with a quantum counting detector and a circuit arrangement of the quantum counting detector. Background technique

[0002] X-ray systems with quantum counting detectors, in particular CT systems, and methods for analyzing detector pulses from the detectors are generally known. For application in CT systems in recent years, besides conventional detector types with integrating detector elements used hitherto, such quantum counting detectors have been suggested as possible solutions for reducing patient dose and for Measured energy-resolved in a single-source CT system. In these ...

Claims

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