Rapid registering and splicing method used for three-dimensional digital subtraction angiography image

Abstract

The invention discloses a rapid registering and splicing method used for a three-dimensional digital subtraction angiography image. The method comprises the following steps: a) two volume data images of the three-dimensional digital subtraction angiography image are selected, and the overlapped areas are extracted to denote as sub-volume-data images; b) maximum intensity projection is performed on the sub-volume-data images at a coronal surface, a sagittal surface and a cross section respectively so that MIP1 and MIP2 images are formed; c) first time of registering is performed on the MIP1 and MIP2 images respectively at the aforementioned two-dimensional surfaces; d) and second time of registering is performed on the two volume data images in three-dimensional space according to the result of the first time of registering, then the overlapped areas are fused and finally a panoramic three-dimensional subtraction volume data image is formed via splicing. According to the rapid registering and splicing method used for the three-dimensional digital subtraction angiography image, influence of image data quality on registering precision can be avoided, and registering and splicing processing time can be greatly shortened.

Description

technical field [0001] The invention relates to a medical image processing method, in particular to a fast registration and mosaic method for three-dimensional digital subtraction angiography images. Background technique [0002] Angiography is currently the main method for diagnosing vascular diseases. In the process of medical imaging, there is often a contradiction that the inspected part is much larger than the area of ​​the image detector. It is necessary to divide the part into several shots, and then stitch them together according to certain rules. Taking magnetic resonance imaging as an example, due to the limitation of the size of the scanning plate of the MRI system, when scanning the blood vessels of the lower extremities or the whole body, the MRI will perform multi-segment scanning, reconstruction and subtraction, in order to synthesize multiple segmented vascular subtraction volume data For a panoramic vascular subtraction volume data, stitching has become nec...

AI Technical Summary

Problems solved by technology

For multi-segment 3D angiographic subtraction volume data images, since the foreground image of each slice in the vascular subtraction volume data (that is, the highlighted blood vessel with contrast agent) has little information, it is more noise-polluted. Black background, and the black background often contains residual information of bone and soft tissue that has not been completely reduced, making the image signal-to-noise ratio very low. Such image data quality places extremely high requirements on the accu

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