一種適用于正電子斷層圖像去噪研究的簡(jiǎn)易圖像模擬方法
[Abstract]:As an advanced imaging technology, positron tomography is widely used in clinical diagnosis and medical research. Positron tomography equipment is expensive, imaging drugs are radioactive, so most of the related image processing research on the computer simulation of positron tomography images as the research object. At present, the common image simulation method of positron tomography is based on Monte Carlo method, using GATE or Sim SET to get the simulated image. These simulation methods are complex, and the whole simulation process takes a lot of time. In this paper, a PET image simulation method is proposed, and the effectiveness of the simulation method is demonstrated by comparing the results of simulated image with that of real image after wavelet denoising. The simulation method is based on the Matlab platform and takes the digital photos of the actual physical model as the blueprint. The simulated PET images are obtained by the transformation of bin Laden and the addition of Poisson noise with the intensity of 5. In the process of wavelet denoising, the SNR CR-FWHM and other indexes of image are selected to compare. The comparison results show that the simulated image and the real image after wavelet denoising have the same change trend in SNR and FWHM. In CR index, the error of image change rate is less than 10 parts. The experimental results show that the simulation method is reasonable and effective.
【作者單位】: 中國(guó)礦業(yè)大學(xué)信電學(xué)院;徐州醫(yī)學(xué)院影像學(xué)院;陽明大學(xué)生物醫(yī)學(xué)影像與放射科學(xué)系;
【分類號(hào)】:R817;TP391.41
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