Fourier-wavelet regularization-based coaxial phase contrast image restoration method

A phase contrast image and recovery method technology, applied in the fields of biomedical engineering and medical imaging, can solve the problems of phase contrast image quality deterioration, phase contrast reduction, etc., to make up for the lack of imaging performance, improve contrast, and ensure preservation The effect of authenticity

Inactive Publication Date: 2013-01-09
TIANJIN UNIV
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Problems solved by technology

[0010] The gist of the present invention is to propose a method that can improve the contrast and signal-to-noise ratio of X-ray coaxial phase contrast imaging results, so as to solve the key problems faced by coaxial phase contrast imaging under the curr

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  • Fourier-wavelet regularization-based coaxial phase contrast image restoration method
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  • Fourier-wavelet regularization-based coaxial phase contrast image restoration method

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Embodiment Construction

[0033] Aiming at the deterioration of phase contrast imaging results caused by detector, light source and system noise in the process of X-ray coaxial phase contrast imaging, the present invention proposes a Fourier-wavelet regularization method for coaxial phase contrast imaging, which can effectively suppress the above-mentioned The influence of the deterioration effect on the imaging result can improve the image contrast of the details of the phase contrast result, and at the same time ensure the fidelity of the restored image. The present invention will be described in detail below from several aspects in conjunction with the accompanying drawings and embodiments.

[0034] 1 Digital X-ray Imaging System

[0035] The experimental imaging system is Pixarray 100 small animal digital radiography system, manufactured by BIOPTICS Company of the United States. The detector of the system is a 1024×1024 CCD array with a pixel size of 50 μm×50 μm and 14 gray levels. The horizontal...

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Abstract

The invention belongs to the field of biomedical engineering and medical imaging, and relates to a fourier-wavelet regularization-based coaxial phase contrast image restoration method. The method comprises the steps: collecting a plurality of images of a tool edge instrument, and acquiring tool edge section curves of each image at different positions to obtain an integrated line spread function h(x) of a coaxial phase contrast imaging system; placing an imaging object, and collecting images to obtain an imaging result y(x); calculating fourier transformation of the y(x) and the h(x) to obtain Y(omega) and H(omega); obtaining fourier regularization evaluation of an ideal phase contrast imaging result through fourier inverse transformation, and effectively evaluating the wavelet coefficient signal wj(x) of the ideal phase contrast f(x); and conducting Db6 orthogonal wavelet transform on the fourier regularization evaluation, and carrying out regularization to obtain wavelet inverse transformation and obtain an evaluation result. According to the fourier-wavelet regularization-based coaxial phase contrast image restoration method, the contrast of the phase contrast image under deterioration effect can be effectively improved, the fidelity of the restoration image can be ensured, and the image restoration constrast and signal to to noise ratio can be improved.

Description

Technical field [0001] The invention belongs to the fields of biomedical engineering and medical imaging, and relates to an image restoration method. Background technique [0002] Breast cancer is currently the number one "killer" of women. According to the statistics of the World Health Organization, in 2000, about 1.2 million women in the world were diagnosed with breast cancer, and 500,000 people died of breast cancer. Breast cancer not only endangers the lives of patients, but also causes damage to female sexual organs, seriously endangering women's physical and mental health. Although China is not a country with a high incidence of breast cancer, its average annual growth rate has been 1-2 percentage points higher than that of high-incidence countries in the past ten years, with an annual growth rate of 3%-4%. Due to the large population in our country, the diagnosis and treatment of breast cancer has become an increasingly serious social problem that needs to be solve...

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Application Information

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IPC IPC(8): G06T5/50
Inventor 周仲兴高峰赵会娟张力新
Owner TIANJIN UNIV
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