Estimation of tissue proportions in X-ray CT images using a new mixed pixel distribution

• Autorzy: Glasbey C. A. , Robinson C. D.
• Języki publikacji: EN

Abstrakty

EN

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 threshold-based methods.

Słowa kluczowe

EN

bivariate normal distribution; point spread function; sheep breeding; threshold estimation

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 1999
• Tom: Vol. 3, No 4
• Strony: 409--418
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Glasbey C. A.

• Biomathematics and Statistics Scotland JCMB, King s Buildings, Edinburgh, EH9 3JZ, Scotland

autor

Robinson C. D.

• Department of Mathematics and Statistics, University of Edinburgh JCMB, King's Buildings, Edinburgh, EH9 3JZ, Scotland

Bibliografia

• [1] Dore S., Kearney R.E. and De Guise J. A. (1997) Experimental correlation-based identification of X-ray CT point spread function. Part 1: method and experimental results, Medical & Biological Engineering & Computing, 35, 2-8
• [2] Foody G.M. and Cox D.P. (1994) Sub-pixel land cover composition estimation using a linear mixture model and fuzzy membership functions, International Journal of Remote Sensing, 15,619-631
• [3] Glasbey C.A. and Horgan G.W. (1995) Image Analysis for the Biological Sciences, Wiley, Chichester
• [4] Glasbey C. A., Robinson C.D. and Young M.J. (1999) Segmentation of X-ray CT images using stochastic templates, ICIAP'99 10th International Conference on Image Analysis and Processing, Venice, 746-751
• [5] Johnson N.L., Kotz S. and Balakrishnan N. (1994) Continuous Univariate Distributions, Volume 1 (2nd edition), Wiley, New York
• [6] Santago P. and Gage H.D. (1995) Statistical models of partial volume effect, IEEE Transactions on Image Processing, 4, 1531-1540
• [7] Simm G. (1992) Selection for lean meat production in sheep. In ‘Recent Advances in Sheep and Goat Research (ed A.W. Speedy), CAB International, 193-215