X-Ray radiation reduction system
First Claim
1. An X-Ray imaging system for displaying an image on a monitor comprising means for selecting an region of interest in said image and exposing said region of interest to a higher radiation dose than the rest of the image by using a plurality of X-Ray pulses for creating at least some of the images, the higher dose pulses used for the region of interest, using a high speed shutter to limit the high dose radiation to the region of interest, and combining the region of interest area and the rest of the image into a single image.
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Abstract
By exposing the ROI at full exposure and full frame rate while exposing the area outside the ROI with low exposure and up to full frame rate an overall reduction in X-Ray radiation is achieved. The resultant image has slightly lower resolution outside the ROI but better resolution (as compared to standard fluoroscopy practices) in the ROI because of reduced scattering. Different exposures are supplied to different parts of the image by using a fast shutter in conjunction with the exposure control.
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Citations
19 Claims
- 1. An X-Ray imaging system for displaying an image on a monitor comprising means for selecting an region of interest in said image and exposing said region of interest to a higher radiation dose than the rest of the image by using a plurality of X-Ray pulses for creating at least some of the images, the higher dose pulses used for the region of interest, using a high speed shutter to limit the high dose radiation to the region of interest, and combining the region of interest area and the rest of the image into a single image.
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9. A method for X-ray imaging comprising the following steps:
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controlling a shutter to select a region of interest in an X-Ray image, said region of interest being smaller than the desired image; generating a high radiation dose X-Ray pulse; opening said shutter to the size of the full image; generating a lower dose X-Ray pulse; and combining the high and low dose images into a single image. - View Dependent Claims (10, 11, 12, 14, 19)
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- 15. An X-Ray imaging system wherein at least some of the displayed images are formed by combining two images created by two X-ray pulses, a higher radiation dose pulse for imaging a region of interest and a lower radiation dose pulse for imaging the rest of the image.
Specification