ESTIMATION OF TISSUE PROPORTIONS IN X-RAY CT IMAGES USING A NEW MIXED PIXEL DISTRIBUTION

TASK Quarterly

卷:3

CHRISTOPHER ANDREW GLASBEY¹  CAROLINE DENISE ROBINSON² 

[1] Biomathematics and Statistics Scotland JCMB, King s Buildings;

[2] University of Edinburgh JCMB, King's Buildings, Department of Mathematics and Statistics;

关键词: bivariate normal distribution;    point spread function;    sheep breeding;    threshold estimation;   

DOI  :  

来源: DOAJ

【 摘 要 】

A new probability distribution is obtained, termed the mixed pixel distribution, appropriate for the mixing proportion in digital images when the point spread function has a bivariate normal density. It is used to derive the distribution of pixel values in X-ray CT images where pixels may be a mixture of two tissue types. In a simulation study it is shown that, by fitting this distribution to histograms of pixel values, tissue proportions are estimated more accurately than using threshola-based methods.

【 授权许可】

Unknown