发明名称 |
Physically-based, probabilistic model for ultrasonic images incorporating shape, microstructure and system characteristics |
摘要 |
The present invention is a method and apparatus that creates a physical model of image formation and performs a random phasor sum representation of the physical model to create the probabilistic model. The physical model incorporates imaging system characteristics, gross shape and microstructure. The phasor sum representation results from a linear model of the imaging system characteristics as characterized by a point spread function. Tissue microstructure is characterized by multiple discrete scatterers distributed across a surface of the gross shape. Each discrete scatterer contributes a phasor to the phasor sum representation. The image model is formed using image pixel-based statistics. Amplitude mean, amplitude variance and a ratio of amplitude mean to standard deviation is computed at each image pixel. Based on the computations, each pixel is classified as Rayleigh or Gaussian and assigned a density function. A data likelihood is constructed as a product of the assigned density functions.
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申请公布号 |
US2002075383(A1) |
申请公布日期 |
2002.06.20 |
申请号 |
US20010840629 |
申请日期 |
2001.04.23 |
申请人 |
TROBAUGH JASON W.;ARTHUR R. MARTIN |
发明人 |
TROBAUGH JASON W.;ARTHUR R. MARTIN |
分类号 |
G06T7/00;H04N15/00;(IPC1-7):H04N13/00 |
主分类号 |
G06T7/00 |
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