| 摘要 |
<p>Apparatus for producing image data representing a specimen being imaged using ultrasound includes a processor and memory. The processor is configured to receive input data representing the output from an ultrasound probe, process the input data to produce output image data, and output the output image data. The processor is configured to carry out the step of producing output image data by obtaining a first matrix that is dependent upon attributes of the probe and on the way in which the input data was produced, initialising estimates for the image data, the echogenicity of the image data, and the variance of the noise of the image data, and iteratively performing the following steps until a predetermined level of convergence is reached: (a) updating the estimate of the image data using: the first matrix, the estimate of the echogenicity, the estimate of the variance of the noise, and the input data, (b) updating the estimate of the echogenicity using the estimate of the image data, and (c) updating the estimate of the variance of the noise using the estimate of the image data. Step (c) is performed using an update rule that assumes the noise to be varying across the image data but locally invariant for any small enough region of the image data. The processor then uses the converged estimate of the image data to produce the output image data.</p> |
