X-ray detector, X-ray device and method for temperature regulation

Abstract

The present invention relates to an X-ray detector comprising at least one detector unit and a temperature control unit, wherein the detector unit and the temperature control unit are mounted in a defined arrangement relative to one another and movable relative to an examination object to be imaged by X-ray fluoroscopy, wherein the detector unit is designed to detect X-ray radiation impinging on an X-ray sensitive surface of the detector unit, wherein the temperature control unit has a fluid supply unit, a heat exchanger and at least one fluid channel, wherein the fluid supply unit is designed to provide a fluid, wherein the heat exchanger is designed to temperature-control the fluid to a predefined temperature or a predefined temperature range, wherein the provided temperature-controlled fluid can flow through the at least one fluid channel, wherein the at least one fluid channel is arranged such thatthat heat is transferable between the detector unit and the fluid.The invention further relates to an X-ray device and a method for temperature regulation.,

Claims

[1] X-ray detector (1), comprising at least one detector unit (D) and a temperature control unit, wherein the detector unit (D) and the temperature control unit are mounted in a defined arrangement relative to one another and movable relative to an examination object (39) to be imaged by means of X-ray fluoroscopy, wherein the detector unit (D) is designed to detect X-ray radiation impinging on an X-ray sensitive surface of the detector unit (D), wherein the temperature control unit comprises a fluid supply unit (FLB), a heat exchanger (W) and at least one fluid channel (FLK), wherein the fluid supply unit (FLB) is designed to provide a fluid (PROV-FL), wherein the heat exchanger (W) is designed to temper the fluid to a predefined temperature or a predefined temperature range, wherein the at least one fluid channel (FLK) can be flowed through by the provided tempered fluid, wherein the at least one fluid channel (FLK) is arranged such that heat can be transferred between the detector unit (D) and the fluid. [2] X-ray detector (1) according to claim 1, wherein the detector unit (D) is designed for photon-counting detection of the X-ray radiation impinging on the X-ray sensitive surface of the detector unit (D). [3] X-ray detector (1) according to claim 1 or 2, wherein the temperature control unit further comprises a heating element (HE) which is designed to heat the detector unit to a further predefined temperature. [4] X-ray detector (1) according to one of claims 1 to 3, wherein the fluid comprises a gas mixture, wherein the temperature control unit further comprises a dehumidifier (H) which is designed to adjust a water content in the fluid before flowing through the at least one fluid channel (FLK) such that a dew point temperature of the fluid is below a current temperature of the fluid. [5] X-ray detector (1) according to one of the preceding claims, wherein the fluid comprises a gas mixture, wherein the fluid supply unit (FLB) is designed to supply the fluid from a first environment to the heat exchanger (W), wherein the temperature control unit is designed to release the fluid from the at least one fluid channel (FLK) into a second environment after heat transfer with the detector unit (D). [6] X-ray detector (1) according to one of claims 1 to 4, wherein the fluid supply unit (FLB) is designed to repeatedly supply the fluid to the heat exchanger (W) from the at least one fluid channel (FLK) after heat transfer with the detector unit (D). [7] X-ray detector (1) according to one of the preceding claims, wherein the fluid supply unit (FLB) comprises a pump and / or a fan and / or a nozzle, wherein the pump and / or the fan and / or the nozzle are designed to provide the fluid at a predefined pressure (PROV-FL). [8] X-ray detector (1) according to one of the preceding claims, wherein the detector unit (D) comprises several detector modules (D.1, ..., D.5), wherein the temperature control unit comprises at least one fluid channel (FLK.1, ..., FLK.5) to each of the plurality of detector modules (D.1, ..., D.5), wherein the fluid channels (FLK.1, ..., FLK.5) can be flowed through by the fluid, wherein the fluid channels (FLK.1, ..., FLK.5) are arranged such that heat can be transferred between the detector modules (D.1, ..., D.5) and the fluid. [9] X-ray detector (1) according to claim 8, wherein the fluid supply unit (FLB) for each of the detector modules (D.1, ..., D.5) comprises a subfluid supply unit (SFLB.1, ..., SFLB.5) which is designed to supply the tempered fluid to the respective fluid channels (FLK.1, ..., FLK.5). [10] X-ray detector (1) according to one of the preceding claims, wherein the X-ray detector (1) further comprises a sensor (S) which is designed to detect (CAP-T) a current temperature of the fluid and / or the detector unit (D) and / or a current amount of fluid provided, wherein the heat exchanger (W) is designed to temper the fluid as a function of the current temperature and / or the current amount of fluid provided (CTRL-W) and / or wherein the fluid provision unit (FLB) is designed to adapt a current amount of fluid provided per unit of time as a function of the current temperature (CTRL-FLB). [11] X-ray detector (1) according to claim 9 and 10, wherein the subfluid supply units (SFLB.1, ..., SFLB.5) are designed to individually and / or coordinately adjust a respective provided amount of fluid per unit of time depending on the current temperature. [12] X-ray detector (1) according to one of the preceding claims, wherein the heat exchanger (W) is designed to temper the fluid to a temperature between 18 and 30 °C. [13] X-ray device comprising an X-ray source (37) and an X-ray detector (1) according to one of the preceding claims, wherein the X-ray source (37) is designed to emit X-ray radiation for illuminating an examination object (39) arranged between the X-ray source (37) and the X-ray detector (1). [14] X-ray device according to claim 13, wherein the X-ray source (37) and the X-ray detector (1) are mounted in a defined arrangement so as to be rotatable about a common axis of rotation (43). [15] Method for temperature regulation of a detector unit (D) of an X-ray detector (1) according to one of claims 1 to 12, comprising: - Providing the fluid (PROV-FL) by means of the fluid supply unit (FLB) to flow through the at least one fluid channel (FLK), whereby heat is transferred between the detector unit (D) and the fluid, - detecting (CAP-T) a current temperature of the fluid and / or the detector unit (D) and / or a currently provided amount of fluid by means of a sensor (S), - Controlling the heat exchanger (CTRL-W) depending on the detected instantaneous temperature and / or the detected instantaneous amount of fluid provided such that the fluid is tempered to a predefined temperature or a predefined temperature range and / or controlling the fluid provision unit (CTRL-FLB) depending on the detected instantaneous temperature such that a provided amount of fluid per unit of time is adjusted. [16] Method according to claim 15, wherein the fluid comprises a gas mixture, wherein a water content in the fluid is adjusted (ADJ-H) by means of a dehumidifier (H) before flowing through the at least one fluid channel such that a dew point temperature of the fluid is below the current temperature of the fluid.

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