Direct conversion x-ray detector

1. A direct-conversion x-ray detector or x-ray detector module for detection of x-ray radiation, comprising:

a direct converter to detect x-ray radiation;

at least one collimator arranged in front of the direct converter in a direction of radiation of the x-ray radiation, the at least one collimator configured to restrict direct irradiation of the direct converter by the x-ray radiation; and

at least one radiation source at a side of the direct converter, the at least one radiation source configured to irradiate the direct converter with additional radiation;

wherein the at least one collimator includes

at least one reflection layer on a side facing the direct converter, the at least one reflection layer configured to reflect the additional radiation onto the direct converter, and

a cooling facility configured to cool the at least one radiation source; and

wherein the additional radiation is one of visible and infrared radiation.

2. The x-ray detector of claim 1 , wherein

the at least one collimator is at least partly formed of a thermally-conductive material; and

the at least one radiation source is integrated into at least one heat sink, which is thermally-conductively connected to the at least one collimator.

3. The x-ray detector of claim 1 , wherein

the at least one collimator is at least partly formed of a thermally-conductive material; and

the at least one radiation source is integrated into at least one heat sink, which is an integral component of the at least one collimator.

4. The x-ray detector of claim 1 , wherein the at least one collimator is composed of metal and includes one of metal ribs and metal gratings.

5. The x-ray detector of claim 1 , wherein the at least one radiation source includes one or more light-emitting diodes (LEDs).

6. The x-ray detector of claim 1 , wherein the at least one radiation source is configured to emit infrared radiation.

7. The x-ray detector of claim 1 , wherein the at least one radiation source includes two radiation sources, the two radiation sources arranged on at least two sides of the direct converter.

8. The x-ray detector of claim 1 , wherein the direct converter and the at least one collimator are separated by a gap for the additional radiation.

9. The x-ray detector of claim 1 , wherein the x-ray detector is a computed tomography x-ray detector for use in a computed tomography (CT) system.

10. The x-ray detector of claim 2 , wherein the at least one collimator is composed of metal and includes one of metal ribs and metal gratings.

11. The x-ray detector of claim 3 , wherein the at least one collimator is composed of metal and includes one of metal ribs and metal gratings.

12. The x-ray detector of claim 2 , wherein the at least one radiation source includes one or more light-emitting diodes (LEDs).

13. The x-ray detector of claim 2 , wherein the at least one radiation source is configured to emit infrared radiation.

14. The x-ray detector of claim 5 , wherein the at least one radiation source is configured to emit infrared radiation.

15. The x-ray detector of claim 5 , wherein the at least one radiation source includes two radiation sources, the two radiation sources arranged on at least two sides of the direct converter.

16. The x-ray detector of claim 6 , wherein the at least one radiation source includes two radiation sources, the at least two radiation sources arranged on at least two sides of the direct converter.

17. The x-ray detector of claim 3 , wherein the at least one collimator is composed of metal and includes one of metal ribs and metal gratings.

18. The x-ray detector of claim 3 , wherein the at least one radiation source includes one or more light-emitting diodes (LEDs).

19. A computed tomography (CT) system comprising:

the x-ray detector of claim 2 , wherein the x-ray detector is a CT x-ray detector.

20. A computed tomography (CT) system comprising:

the x-ray detector of claim 3 , wherein the x-ray detector is a CT x-ray detector.