Method for extracting tumor elasticity characteristics based on ultrasonic elastography

Abstract

The invention provides a method for extracting tumor elasticity characteristics based on ultrasonic elastography. The method comprises the following steps that medical images and elasticity images are collected; the medical images are preprocessed; the tumor marginal information of the preprocessed medical images is automatically extracted; the tumor marginal information is fused into the elasticity images; an elasticity characteristic parameter group, fused with the tumor marginal information, of the elasticity images is extracted. According to the method for extracting the tumor elasticity characteristics based on the ultrasonic elastography, the tumor marginal information is extracted through the medical images, meanwhile, the tumor marginal information is fused into the elasticity images, the elasticity characteristic parameter group based on the elasticity images is built and quantized and can describe the attributes of tumors from different angles, and therefore the subjective difference of clinicians is eliminated, and diagnosis is more accurate and more scientific.

Description

technical field [0001] The invention relates to image processing technology, in particular to a method for extracting tumor elasticity features based on ultrasound elastography. Background technique [0002] Elastography is to apply an external stimulus to the tissue. Under the action of physical laws such as pressure-deformation, the tissue will produce a response, and an elastography map will be obtained according to the response. Since the concept of elastography was proposed, ultrasound elastography technology has developed rapidly in the past ten years. [0003] I am interested in the elastic characteristic parameters based on ultrasonic transient elastography technology proposed by "Medical Liberation Army Journal", Vol. 36, No. 11, pp. 1131-1133, 2011, and "Chinese Medical Imaging Technology", Vol. 28, No. 3, No. 3, pp. 529-533, 2012. However, the instantaneous elasticity detection technology used is a one-dimensional imaging technology. Although it can give quantita...

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Problems solved by technology

[0003] I am interested in the elastic characteristic parameters based on ultrasonic transient elastography technology proposed by "Medical Liberation Army Journal", Vol. 36, No. 11, pp. 1131-1133, 2011, and "Chinese Medical Imaging Technology", Vol. 28, No. 3, No. 3, pp. 529-533, 2012. However, the instantaneous elasticity detection technology used is a one-dimensional imaging technology. Although it can give quantitative average elastic modulus values ​​of tissues, it cannot be extended to two-dimensional elastography to obtain tissue elastic distribution information. Generally, only Suitable for detection of diffuse lesions; "Chinese Medical Imaging Technology", Volume 26, Issue 9, 2010, pages 1682-1684, "Modern Biomedicine Progress", Volume 26, Issue 9, 2010, pages 492-494, and "West China Medicine" 2010 Volume 25, No. 2, pp. 294-297, proposed the elasticity image distribution characteristics based on ultrasound real-time elastography technology. Although the most widely used elastic features in clinical diagnosis are given, real-time elastography technology is a quasi-static Compression elastography can only give relative displacement / strain diagrams, but cannot give specific values ​​of tissue local hardness, which lacks objectivity and scientificity; "Chinese Medical Imaging Technology", Volume 18, Issue 7, 2009, 589-591 The elastic characteristic strain rate ratio based on ultrasonic real-time elastography technology proposed by Page and "World Chinese Journal of Digestion" 2010, Vol. 18, No. 30, pp. Extracted from the displacement / strain map, although it can more objectively and quantitatively reflect the degree of hardness change of the lesion than the simple elastic distribution feature, but this feature is also unable to make a horizontal comparison between different lesions, such as the malignant liver mass on the basis of liver cirrhosis There is a certain overlap between the strain rate ratio intervals obtained for benign space-occupying lesions and benign liver lesions, and it is easy to cause misdiagnosis by only relying on the strain rate ratio

[0004] Therefore, the traditional ultrasound elastography technology has many limitations, which make the acquired elastic characteristics qualitative or semi-quantitative, lack of objectivity and repeatability, cannot be quantitatively analyzed, and are subject to the subjective influence of the diagnostician, so it is impossible to establish a recognized and standardized method. diagnostic criteria, which limits the wide application of ultrasound elastography in clinical practice

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