Medipix imaging - evaluation of datasets with PCA

Spectral datasets of a watch and a fetal hand have been acquired with the energy-resolving 2D X-ray imaging detector Medipix-2. We applied principal component analysis (PCA) to evaluate the spectral information in the data. PCA is useful as it identifies the relevant information in a few derived var...

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Bibliographic Details
Published in:	2008 23rd International Conference Image and Vision Computing New Zealand pp. 1 - 6
Main Authors:	Butzer, J.S., Butler, A.P.H., Butler, P.H., Bones, P.J., Cook, N., Tlustos, L.
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01-11-2008
Subjects:	Computed tomography Displays image processing Image reconstruction Medipix Optical imaging Principal component analysis principal components spectroscopic x-ray imaging Watches X-ray detection X-ray detectors X-ray imaging X-ray scattering
Online Access:	Get full text
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Summary:	Spectral datasets of a watch and a fetal hand have been acquired with the energy-resolving 2D X-ray imaging detector Medipix-2. We applied principal component analysis (PCA) to evaluate the spectral information in the data. PCA is useful as it identifies the relevant information in a few derived variables that account for most of the variance of the dataset. A scattergram and cluster analysis allow us to group pixels with similar spectral characteristics. With our data, three derived variables display the most relevant information of the full dataset which can be represented in one RGB image. We have begun to apply this method to CT reconstructed slices to separate different materials. Our approach applies PCA to the energy domain and should not be confused with widely used applications of PCA in pattern recognition where it is applied to the spatial domain.
ISBN:	1424425824 1424437806 9781424437801 9781424425822
ISSN:	2151-2191 2151-2205
DOI:	10.1109/IVCNZ.2008.4762080