Method, apparatus, device and storage medium for extracting a cardiovisceral vessel from a CTA image

1. A method for extracting a cardiovisceral vessel from a CTA image, comprising the steps of:

performing a corrosion operation and an expansion operation on an image data successively via a preset structural element to obtain a structure template, wherein the image data is a coronary angiography image after a downsampling processing, and the structure template is a structure excluding a pulmonary region;

performing a transformation in layer-by-layer on slice images of the structure template to acquire a first ascending aorta structure in the structure template, and acquiring an aorta center coordinate and an aorta radius in the last layer of slice image of the structure template; and

establishing a binarized spherical structure according to the aorta center coordinate and the aorta radius, and synthesizing a second ascending aorta structure by combining the first ascending aorta structure with the structure template and the binarized spherical structure.

2. The method of claim 1 , wherein the step of performing a corrosion operation and an expansion operation on an image data successively via a preset structural element to obtain a structure template comprises:

taking as the preset structural element a sphere of which a radius is controlled at a preset volume element, and

first performing the corrosion operation on the image data via the preset structural element and then performing the expansion operation on the image data via the preset structural element, to obtain the structural template.

3. The method of claim 1 , wherein the step of performing a layer-by-layer transformation on slice images of the structure template to acquire a first ascending aorta structure in the structure template and acquiring an aorta center coordinate and an aorta radius in the last slice image of the structure template comprises:

determining, during the transformation in layer-by-layer if a distance between the aorta center coordinates of the current slice image and the preceding slice image is larger than a preset deviation value, the current slice image to be the last layer of slice image, and acquiring the aorta center coordinate and the aorta radius in the last layer of slice image.

4. The method of claim 1 , wherein a calculation formula for synthesizing a second ascending aorta structure by combining the first ascending aorta structure with the structure template and the binarized spherical structure is:

A S =( A N ∪Sph X )∩ B

wherein, A S is the second ascending aorta structure, A N is the first ascending aorta structure, Sph X is the binarized spherical structure and B is the structure template.

5. The method of claim 1 , further comprising:

performing a contrast equalization filtering on the image data according to a blood vessel shape and a blood vessel signal strength to enhance the coronary artery vessel, and determining a coronary artery opening position according to a maximum response filtering in the second ascending aorta structure.

6. An apparatus for extracting a cardiovisceral vessel from a CTA image, comprising:

a structure template acquiring unit, configured for performing a corrosion operation and an expansion operation on an image data successively via a preset structural element to obtain a structure template, wherein the image data is a coronary angiography image after a downsampling processing, and the structure template is a structure excluding a pulmonary region;

a layer-by-layer transformation unit, configured for performing a transformation in layer-by-layer on slice images of the structure template to acquire a first ascending aorta structure in the structure template, and acquiring an aorta center coordinate and an aorta radius in the last layer of slice image of the structure template; and

a synthesizing unit, configured for establishing a binarized spherical structure according to the aorta center coordinate and the aorta radius and synthesizing a second ascending aorta structure by combining the first ascending aorta structure with the structure template and the binarized spherical structure.

7. The apparatus of claim 6 , wherein the structure template acquiring unit comprises:

a structure template acquiring subunit, configured for taking as the preset structural element a sphere of which a radius is controlled at a preset volume element, and first performing the corrosion operation on the image data via the preset structural element and then performing the expansion operation on the image data via the preset structural element to obtain the structural template.

8. The apparatus of claim 6 , wherein the layer-by-layer transformation unit comprises:

a layer-by-layer transformation subunit, configured for determining, during the transformation in layer-by-layer if a distance between the aorta center coordinates of the current slice image and the preceding slice image is larger than a preset deviation value, the current slice image to be the last layer of slice image, and acquiring the aorta center coordinate and the aorta radius in the last layer of slice image.

9. A device for extracting a cardiovisceral vessel from a CTA image, comprising: a memory, a processor and a computer program that is stored in memory and is executable on the processor, wherein when the computer program is executed by the processor, steps of a method for extracting a cardiovisceral vessel from a CTA image are implemented, wherein the steps of the method comprises:

performing a corrosion operation and an expansion operation on an image data successively via a preset structural element to obtain a structure template, wherein the image data is a coronary angiography image after a downsampling processing, and the structure template is a structure excluding a pulmonary region;

performing a transformation in layer-by-layer on slice images of the structure template to acquire a first ascending aorta structure in the structure template, and acquiring an aorta center coordinate and an aorta radius in the last layer of slice image of the structure template; and

establishing a binarized spherical structure according to the aorta center coordinate and the aorta radius, and synthesizing a second ascending aorta structure by combining the first ascending aorta structure with the structure template and the binarized spherical structure.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, wherein the steps of the method according to claim 1 are implemented when the computer program is executed by a processor, the steps of the method comprises:

performing a corrosion operation and an expansion operation on an image data successively via a preset structural element to obtain a structure template, wherein the image data is a coronary angiography image after a downsampling processing, and the structure template is a structure excluding a pulmonary region;

performing a transformation in layer-by-layer on slice images of the structure template to acquire a first ascending aorta structure in the structure template, and acquiring an aorta center coordinate and an aorta radius in the last layer of slice image of the structure template; and

establishing a binarized spherical structure according to the aorta center coordinate and the aorta radius, and synthesizing a second ascending aorta structure by combining the first ascending aorta structure with the structure template and the binarized spherical structure.