Biological tissue displacement evaluating method using two kinds of size

A scale and displacement technology, applied in the field of biological tissue displacement estimation, can solve the problem of increasing data acquisition time and so on

Inactive Publication Date: 2005-03-02
TSINGHUA UNIV
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However, this method increases data acquisition time

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  • Biological tissue displacement evaluating method using two kinds of size
  • Biological tissue displacement evaluating method using two kinds of size
  • Biological tissue displacement evaluating method using two kinds of size

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Embodiment Construction

[0051] The tissue displacement estimation method using two scales proposed by the present invention will be described in detail in combination with specific embodiments and drawings as follows:

[0052] The embodiment of the present invention uses a computer program and a general ultrasonic scattering model simulation to obtain a one-dimensional radio frequency signal of a simulated tissue before and after compression. The tissue thickness is 60mm, and the elastic modulus at 0-30mm is 3 times that at 30-60mm. A simple one-dimensional model is used, so the strain at 0-30mm is 1 of the strain at 30-60mm. / 3. The amount of compression applied to the tissue is 3.33%, or 1.98mm; the center frequency of the probe is 3.5MHz, and the -3dB bandwidth is 2.0MHz. Because of the simple one-dimensional model, there is only one scan line; the sampling frequency of the radio frequency signal is 20MHz, Assuming that the propagation speed of ultrasound in the tissue is 1540m / s, therefore 1mm tissue...

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Abstract

The present invention belongs to the field of supersonic elastic imaging technology. The two size biological tissue displacement estimating method includes: taking the data d1 of the size Ta in the first scanning line in the 2D RF signal before tissue compression, finding the cross correlation function of the data d1 and the scanning data after tissue compression, taking data e1 in the size Tb at the center of data section d1, finding the cross correlation function of the data e1 and the scanning line data to obtain the position t''1 corresponding to maximum data, and finally finding out the fine regulated displacement t1 of the small data section d1 to obtain the tissue displacement evaluation corresponding to the scanning lines. In case of great tissue compression amount, the present invention will combine the displacement estimation methods with great size and small size and thus has raised tissue displacement estimation precision.

Description

Technical field [0001] The invention belongs to the technical field of ultrasonic elastography, and particularly relates to a method for estimating the displacement of biological tissues. Background technique [0002] The change of elastic modulus of biological tissue is usually related to its pathological phenomenon. For example, malignant pathological lesions, such as breast cancer, prostate cancer, thyroid cancer, and liver metastases, usually appear as hard nodules. Sclerocarcinoma of the breast is the most common form of breast cancer, accounting for about three-quarters of the total number of breast cancers. It appears as a dense lump due to its increased matrix density. Other types of breast cancer, such as intraductal carcinoma and papilloma, show soft tissue, and benign fibrocystic breast disease rarely show lumps. [0003] The elastic modulus information of biological tissues has important reference value for the diagnosis process of diseases. However, traditional medic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/08
Inventor 白净罗建文
Owner TSINGHUA UNIV
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