Method and device for removing scanning table from CTA (Computed Tomography Angiography) image

The application discloses a method and device for removing a scanning table from a CTA (Computed Tomography Angiography) image. The method comprises the following steps of: acquiring a brain CTA image, and removing background pixel points in the CTA image; extracting a whole-brain image from the brain CTA image with the background pixel points being removed; finding a pixel point corresponding to a scanning table image from the whole-brain image by using a region growing algorithm, setting the gray value of the pixel point corresponding to the scanning table image to be zero, and removing the scanning table image. By using the method and device for removing the scanning table from the CTA image, the scanning table image can be completely removed, therefore, the problem that partial scanning table image is still remained after the CTA image is subjected to subtraction operation is avoided, in addition, the problem of a table image with high brightness in a three-dimensional visualized reconstruction result is