Method for determining the temperature of a digital x-ray detector, method for generating a temperature-corrected x-ray image and digital x-ray detector
OwnerGerhard Hahm, Boris Stowasserinventors
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Abstract
In order to improve the image quality of X-ray detectors, a method for determining the temperature of a digital X-ray detector with a scintillator and a pixel matrix of photodiodes is provided at least one point of the X-ray detector. According to the method a reverse voltage is applied to at least a first photodiode, the reverse current of the at least first photodiode is measured, and the temperature of the X-ray detector at the first photodiode is determined from the reverse current.
Claims20
A method for determining the temperature of a digital X-ray detector comprising a scintillator and a pixel matrix of photodiodes at least one point of the X-ray detector, the method comprising the steps of:
- applying a reverse voltage to at least a first photodiode,
- measuring the reverse current of the at least first photodiode, and
- determining the temperature of the X-ray detector at the first photodiode from the reverse current.
A method for generating a temperature-corrected X-ray image using a digital X-ray detector having a scintillator, a pixel matrix of a multiplicity of photodiodes and actuating and readout electronics, the method comprising the steps of:
- recording and reading out a raw X-ray image composed of a multiplicity of pixels,
- determining the temperatures of the photodiodes of the pixel matrix used to generate the raw X-ray image by:
- applying a reverse voltage to at least a first photodiode,
- measuring the reverse current of the at least first photodiode, and
- determining the temperature of the X-ray detector at the first photodiode from the reverse current, and
- the pixels of the raw X-ray image are temperature-corrected on the basis of the determined temperatures of the utilized photodiodes.
A digital X-ray detector comprising a scintillator for converting X-rays into light, a pixel matrix of photodiodes for converting the light into electric charge and actuating and readout electronics for actuating the pixel matrix and reading out the electric charge from the X-ray detector, wherein the X-ray detector is assigned an evaluation unit for determining at least one temperature, wherein the evaluation unit is operable to:
- apply a reverse voltage to at least a first photodiode,
- measure the reverse current of the at least first photodiode, and
- determine the temperature of the X-ray detector at the first photodiode from the reverse current.
Dependencies are inferred from the claim text.