Digital image registration method, digital image registration device, digital subtraction image rectification method and digital subtraction image rectification equipment

An image correction and digital subtraction technology, applied in the field of medical image processing, can solve the problem of inability to objectively evaluate subtracted images, and achieve the effect of objective evaluation and elimination of motion artifacts

Active Publication Date: 2013-09-11
SHENZHEN UNIV
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Problems solved by technology

[0035] The technical problem to be solved by the present invention is to provide a digital image registration method and device, a digit...

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  • Digital image registration method, digital image registration device, digital subtraction image rectification method and digital subtraction image rectification equipment
  • Digital image registration method, digital image registration device, digital subtraction image rectification method and digital subtraction image rectification equipment
  • Digital image registration method, digital image registration device, digital subtraction image rectification method and digital subtraction image rectification equipment

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[0080] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0081] Figure 6 A flow chart of a digital image registration method for digital subtraction image correction according to an embodiment of the present invention is shown, and the digital image registration method will be described step by step below.

[0082] S100. Obtain corresponding template windows for the surplus image, the mask image, and the subtraction image respectively. Specifically, the pixel L(x, y) of the mask image can be used as the center to obtain a template window of w×w size, w is the number of pixels, and a suitable w value can be selected according to the needs; Take the pix...

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Abstract

The invention discloses a digital image registration method, a digital image registration device, a digital subtraction image rectification method and digital subtraction image rectification equipment. The digital image registration method includes: acquiring corresponding template windows for a live image, a mask image and a subtraction image; dividing the template windows into blood-vessel-contained template windows and non-blood-vessel template windows according to blood vessel characteristics in the template windows; and subjecting the non-blood-vessel template windows to similarity measurement on the basis of image quality evaluation. Thereby, motion artifacts in blood vessel areas can be guaranteed to be effectively eliminated, motion noise in non-blood-vessel areas can be eliminated, evaluation indexes for rectification method performances or image registration performances are obtained, and objective evaluations for subtraction image quality and the rectification method performances are realized.

Description

technical field [0001] The invention relates to the technical field of medical image processing, in particular to a digital image registration method and device, and a digital subtraction image correction method and device. Background technique [0002] Digital Subtraction Angiography (DSA: Digital Subtraction Angiography) is an angiographic examination method that combines computer digitization capabilities with conventional X-ray imaging and fluoroscopy devices. Before angiography, take an X-ray film of the inspection site, called a mask (Mask Image), Figure 1a An example image of a mask is shown; a contrast agent is then injected through an artery or vein, and an x-ray of the same area is taken, called a Live Image, Figure 1b An example diagram of a surplus sheet is shown. The subtraction of the mask and the surplus can obtain a clear vascular image marked by the contrast agent, which is called the subtraction image (Subtraction Image). Figure 1c An example diagram o...

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Application Information

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IPC IPC(8): G06T5/00
Inventor 储颖纪震
Owner SHENZHEN UNIV
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