Anti-artifact feature extraction method based on ultrasonic tomography reflection image convex target

Abstract

The invention belongs to the field of computer-aided diagnosis, medical image processing, ultrasonic tomography and medical image analysis, and particularly discloses an anti-artifact feature extraction method based on an ultrasonic tomography reflection image convex target, which comprises the following steps of: (1) drawing an initial convex hull aiming at the convex target in a mode of selecting nodes; (2) calculating a geometric gravity center O1 of a target representation pixel; (3) updating and iterating the nodes; and (4) fitting and shaping the nodes, wherein a region correspondingly surrounded by a contour line obtained by connecting the shaped new nodes is a corresponding image of the extracted convex target. According to the method, details such as the overall process design and iteration conditions of the method are improved, so that the anti-artifact feature extraction method based on the ultrasonic tomography reflection image convex target can be accurate and effective in feature extraction for the reflection image of medical ultrasonic tomography equipment, and the extraction efficiency is improved. And meanwhile, the method has good robustness for artifacts and noise.

Description

technical field

[0001] The present invention relates to the fields of computer-aided diagnosis, medical image processing, ultrasonic tomography, and medical image analysis, and more specifically, to an anti-artifact feature extraction method based on a convex target in an ultrasonic tomographic reflection image, the method and a corresponding system, It can be used with medical ultrasonic tomography equipment. Background technique

[0002] Medical ultrasonic tomography equipment is a new type of high-end medical imaging equipment, which has the advantages of non-invasive, non-radiation, high resolution and high sensitivity. It can use step-by-step scanning to obtain information on different sections of the tissue and reconstruct a three-dimensional image of the tissue. , which has important clinical significance and huge application prospects in the fields of breast cancer screening and diagnosis, neonatal malformation screening and diagnosis, orthopedic diagnosis, and has g...

Examples

Embodiment 1

[0093] Include the following steps:

[0094] Step 1, acquire the image characteristics of the reflection image sequence as follows:

[0095] The image sequence is obtained by scanning with a medical ultrasonic tomography system based on a ring probe. The obtained reflection image has a certain degree of noise and artifacts due to factors such as equipment and imaging objects. The main artifacts include multiple reflections and radial artifacts in the middle of the image, such as figure 2 shown.

[0096] Step 2, draw the initial target convex hull, for example:

[0097] The operator selects the nodes of the convex hull unidirectionally outside the surface of the feature extraction target in a clockwise or counterclockwise direction. The nodes should be selected according to the curvature of the target surface as much as possible, and more nodes should be selected outside the surface with larger curvature.

[0098] After the nodes are selected, the adjacent nodes are connec...

technical field

[0001] The present invention relates to the fields of computer-aided diagnosis, medical image processing, ultrasonic tomography, and medical image analysis, and more specifically, to an anti-artifact feature extraction method based on a convex target in an ultrasonic tomographic reflection image, the method and a corresponding system, It can be used with medical ultrasonic tomography equipment. Background technique

[0002] Medical ultrasonic tomography equipment is a new type of high-end medical imaging equipment, which has the advantages of non-invasive, non-radiation, high resolution and high sensitivity. It can use step-by-step scanning to obtain information on different sections of the tissue and reconstruct a three-dimensional image of the tissue. , which has important clinical significance and huge application prospects in the fields of breast cancer screening and diagnosis, neonatal malformation screening and diagnosis, orthopedic diagnosis, and has g...

Examples

Embodiment 1

[0093] Include the following steps:

[0094] Step 1, acquire the image characteristics of the reflection image sequence as follows:

[0095] The image sequence is obtained by scanning with a medical ultrasonic tomography system based on a ring probe. The obtained reflection image has a certain degree of noise and artifacts due to factors such as equipment and imaging objects. The main artifacts include multiple reflections and radial artifacts in the middle of the image, such as figure 2 shown.

[0096] Step 2, draw the initial target convex hull, for example:

[0097] The operator selects the nodes of the convex hull unidirectionally outside the surface of the feature extraction target in a clockwise or counterclockwise direction. The nodes should be selected according to the curvature of the target surface as much as possible, and more nodes should be selected outside the surface with larger curvature.

[0098] After the nodes are selected, the adjacent nodes are connec...

Images