Rapid convex optimization algorithm based method for registering three-dimensional CT and ultrasonic liver images
A convex optimization algorithm, CT image technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of large image difference, inability to achieve very high precision, automatic and accurate real-time registration difficulties and other problems
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[0044] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:
[0045] figure 1 It is a flowchart of registering 3D CT and ultrasound liver images based on the fast convex optimization algorithm, which specifically includes the following processes:
[0046] Step A: For the input liver CT image I C (x) and ultrasound image I U (x) Adjust the window width and level so that the image display value is within [0, 255]. I C (x) The size is 512×512×58, and the size of each voxel is 0.79mm×0.79mm×3mm. I C (x) The size becomes 1094×1094×115, and the size of each voxel is 0.37mm×0.37mm×1.5mm. I U (x) The size is 300×300×1275, and the size of each voxel is 0.37mm×0.37mm×0.10mm. Through downsampling, I U (x) The size becomes 300×300×85, and the size of each voxel is 0.37mm×0.37mm×1.5mm. The symbols are the same as those defined in the step description part of the specification.
[0047] Step B: For the initial registration b...
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