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US 10,578,459 B2Granted
Method for operating an x-ray device
AssigneeSiemens Healthcare GmbH
InventorsSusanne Dornberger, Dominikus Joachim Müller, Verena Schmidt, Stefan Schwarzer
Life of this patent
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Abstract
A method and device for operating an x-ray device including an x-ray emitter and an x-ray detector are provided. An alternating magnetic field is produced and emitted at the x-ray emitter. At least two sensors are included for capturing at least one physical variable correlating with the alternating magnetic field. An alignment of the x-ray detector relative to the x-ray emitter is determined based on the measurement.
Claims9
A method for operating an x-ray device comprising an x-ray emitter and an x-ray detector, the method comprising:
- generating and emitting an alternating magnetic field by at least two transmitters positioned on the x-ray emitter and arranged symmetrically with respect to one another;
- measuring a magnetic field strength that correlates with the alternating magnetic field by each sensor of a plurality of sensors positioned on the x-ray detector, wherein the plurality of sensors comprises a first pair of sensors arranged symmetrically with respect to one another and a second pair of sensors arranged symmetrically with respect to one another;
- ascertaining an angle of incidence for each pair of sensors based on the measured magnetic field strengths between each pair of sensors, wherein the ascertaining comprises applying trigonometric functions;
- calculating a mean value from the ascertained angle of incidence of each pair of sensors;
- determining a rotation of the x-ray detector about at least two axes relative to the x-ray emitter based on the calculated mean value for each pair of sensors;
- and
- determining a three-dimensional position of the x-ray detector relative to the x-ray emitter based on the magnetic field strength measurements by the plurality of sensors.
4 more elements
An x-ray device comprising:
- an x-ray emitter comprising at least two transmitters arranged symmetrically with respect to one another, wherein the at least two transmitters are configured to produce and transmit an alternating magnetic field;
- and
- an x-ray detector comprising a plurality of sensors, the plurality of sensors having a first pair of sensors arranged symmetrically with respect to one another and a second pair of sensors arranged symmetrically with respect to one another, wherein each sensor of the plurality of sensors is configured to measure a magnetic field strength correlating with the alternating magnetic field,
- wherein the x-ray device is configured to:
- ascertain an angle of incidence for each pair of sensors based on the measured magnetic field strengths between each pair of sensors, wherein the ascertaining comprises applying trigonometric functions;
- calculate a mean value from the ascertained angle of incidence of each pair of sensors;
- determine a rotation of the x-ray detector about at least two axes relative to the x-ray emitter based on the calculated mean value for each pair of sensors;
- and
- determine a three-dimensional position of the x-ray detector relative to the x-ray emitter based on the magnetic field strength measurements by the plurality of sensors.
6 more elements
Dependencies are inferred from the claim text.