Method for operating an x-ray device, x-ray device, computer program and electronically readable data carrier

1. A method for operating an x-ray device, the method comprising:

acquiring fluoroscopy images of a patient with a recording rate and a recording dose;

displaying the fluoroscopy images acquired to a user on a display device at a frame rate, the recording dose being selected automatically as a function of a change in image contents between consecutive fluoroscopy images acquired;

determining a display image, with a reduction in the recording dose from each of a number of fluoroscopy images recorded consecutively, corresponding to a maximally usable base dose; and

outputting the display image determined to the display device.

2. The method of claim 1 , wherein the frame rate is reduced when display images are determined.

3. The method of claim 1 , wherein the recording dose is selected as a function of a gradient of a change in image contents using more than two fluoroscopy images recorded consecutively.

4. The method of claim 2 , wherein a change in recording dose is changed in discrete stages as a function of a rearrangement threshold being exceeded or not met by the change in image contents.

5. The method of claim 4 , wherein, with more than two stages, at least one stage is skipped upon at least one threshold value being exceeded by a change in image content gradients.

6. The method of claim 1 , wherein a comparison measure, between two most up to date fluoroscopy images selected in an application-related manner, is selected as a measure of the change in image contents.

7. The method of claim 1 , wherein the fluoroscopy images for monitoring a minimally invasive intervention carried out with an instrument are recorded.

8. An x-ray device, comprising:

a controller, operatively connected to a memory, to:

acquire fluoroscopy images of a patient at a recording rate and a recording dose; and

a display device to display the fluoroscopy images acquired to a user at a frame rate, the recording dose being selected automatically as a function of a change in image contents between consecutive fluoroscopy images acquired,

the controller being further configured to

determine a display image, with a reduction in the recording dose from each of a number of fluoroscopy images recorded consecutively, corresponding to a maximally usable base dose; and

output the display image determined to the display device.

9. A non-transitory computer program product, storing a computer program to, when executed by a controller of an x-ray device, performs the method of claim 1 .

10. A non-transitory electronically readable data carrier, storing a computer program to, when executed by a controller of an x-ray device, performs the method of claim 1 .

11. The method of claim 1 , wherein the method is for operating the x-ray device for recording a series of images for fluoroscopic monitoring of a recording region of the patient.

12. The method of claim 2 , wherein the frame rate is reduced by a factor according to a number of combined fluoroscopy images with disjointed groups of fluoroscopy images to be combined.

13. The method of claim 1 , wherein the recording dose is selected as a function of a gradient of a change in image contents using more than two fluoroscopy images recorded consecutively.

14. The method of claim 1 , wherein a change in recording dose is changed in discrete stages as a function of a rearrangement threshold being exceeded or not met by the change in image contents.

15. The method of claim 14 , wherein, with more than two stages, at least one stage is skipped upon at least one threshold value being exceeded by a change in image content gradients.

16. The method of claim 7 , wherein the instrument is at least one of a catheter and a contrast agent propagation within the patient.