Publication detail

Two-Dimmensional Blind Bayesian Deconvolution of Medical Ultrasound Images

JIŘÍK, R. TAXT, T.

Original Title

Two-Dimmensional Blind Bayesian Deconvolution of Medical Ultrasound Images

Type

journal article - other

Language

English

Original Abstract

A new approach to two-dimensional blind deconvolution of ultrasonic images in a Bayesian framework is presented. The radiofrequency image data are modeled as a convolution of the point spread function and the tissue function, with additive white noise. The deconvolution algorithm is derived from statistical assumptions about the tissue function, the point spread function and the noise. It is solved as an iterative optimization problem. In each iteration, additional constraints are applied as a projection operator, to further stabilize the process. The proposedmethod is an extension of the homomorphic deconvolutionwhich is used here only to compute the initial estimate of the point spread function. Homomorphic deconvolution is based on the assumption that the point spread function and the tissue function lie in different bands of the cepstrum domain, which is not true. This limiting constraint is relaxed in the subsequent iterative deconvolution. The deconvolution is applied globally, to the complete radiofrequency image data. Thus, only the global part of the point spread function is considered. This approach, together with the need for only a few iterations, makes the deconvolution potentially useful for real-time applications. Tests on phantom and clinical images have shown that the deconvolution gives stable results of clearly higher spatial resolution and better defined tissue structures than in the input images and than the results of the homomorphic deconvolution alone.

Keywords

ultrasonic imaging, blind deconvolution

Authors

JIŘÍK, R.; TAXT, T.

RIV year

2008

Released

1. 1. 2008

Publisher

IEEE

ISBN

0885-3010

Periodical

IEEE Transactions on Ultrasonocs, Ferroelectrics, and Frequency Control

Year of study

55

Number

10

State

United States of America

Pages from

2140

Pages to

2153

Pages count

14

BibTex

@article{BUT48773,
  author="Radovan {Jiřík} and Torfinn {Taxt}",
  title="Two-Dimmensional Blind Bayesian Deconvolution of Medical Ultrasound Images",
  journal="IEEE Transactions on Ultrasonocs, Ferroelectrics, and Frequency Control",
  year="2008",
  volume="55",
  number="10",
  pages="2140--2153",
  issn="0885-3010"
}