US 12,453,520 B2 · Systems and methods for CT detector calibration using a wire phantom

Abstract

Systems and methods are provided for calibrating computed tomography (CT) system. In one example, a method for a computed tomography (CT) system comprises, during a calibration of the CT system, measuring a position of a detector element of a detector array of the CT system using a wire of a wire phantom coupled to a table of the CT system, during a rotational scan performed using the CT system; and during a subsequent scan performed on a subject using the CT system, applying the measured position of the detector element rather than a design target position of the detector element during reconstruction of an image from projection data acquired via the CT system; and displaying the reconstructed image on a display device of the CT system.

Claims20

Dependent claims

A method for a computed tomography (CT) system, comprising:

during a calibration of the CT system:
measuring a position of a detector element of a detector array of the CT system with respect to a wire of a wire phantom coupled to a table of the CT system, during a rotational scan performed using the CT system;
and
storing the measured position of the detector element with respect to the wire in a non-transitory memory of the CT system;
and
during a subsequent scan performed on a subject using the CT system:
applying the measured position of the detector element with respect to the wire rather than a design target position of the detector element during reconstruction of an image from projection data acquired via the CT system;
and
displaying the reconstructed image on a display device of the CT system.

6 more elements

A computed tomography (CT) system, comprising a processor and a non-transitory memory including instructions that when executed, cause the processor to:

perform a first series of rotational scans of a wire phantom to determine a straightness of a wire of the wire phantom;
perform a second series of rotational scans of the wire phantom to determine an angle of inclination of the wire;
in response to the straightness of the wire being within a first threshold deviation and the angle of inclination of the wire being within a second threshold deviation:
during a calibration scan performed using the CT system:
measure a position of each detector element of a detector array of the CT system with respect to a location of the wire;
and
during a subsequent scan performed using the CT system:
apply the measured position of each detector element during reconstruction of an image from projection data acquired via the CT system;
and
display the reconstructed image on a display device of the CT system.

7 more elements

Dependencies are inferred from the claim text.

Systems and methods for CT detector calibration using a wire phantom

Life of this patent

Systems and methods for CT detector calibration using a wire phantom

Life of this patent

Abstract

Claims20