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Correction of an x-ray image for effects of an anti-scatter grid
专利权人:
Philipp Bernhardt
发明人:
Philipp Bernhardt,Dirk Ertel
申请号:
US15491684
公开号:
US10159452B2
申请日:
2017.04.19
申请国别(地区):
US
年份:
2018
代理人:
摘要:
A method for correction of an x-ray image recorded with an x-ray device with an anti-scatter grid for effects of the anti-scatter grid is provided. The anti-scatter grid has a spatially periodically repeating geometrical embodiment, and a calibration image recorded without an imaging object is used. The calibration image and the x-ray image are transformed by a transformation into the position frequency space. In the position frequency space, adaptation parameters describing changes of the calibration image optimizing a measure of matching between the x-ray image and the calibration image are established. For correction, the adapted calibration image is subtracted from the x-ray image, and the x-ray image is transformed back into the position space again using an inverse of the transformation.
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