Proceedings of the Korean Information Science Society Conference (한국정보과학회:학술대회논문집)

  • 2002.10d
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  • Pages.301-303
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  • 2002
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  • 1598-5164(pISSN)
Korean Institute of Information Scientists and Engineers (한국정보과학회)
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Rectified Subspace Analysis of Dynamic Positron Emission Tomography

정류된 부공간 해석을 이용한 PET 영상 분석

  • Kim, Sangki (Dept. of Computer Science & Engineering, POSTECH) ;
  • Park, Seungjin (Dept. of Computer Science & Engineering, POSTECH) ;
  • Lee, Jaesung (Dept. of Nuclear Medicine, Seoul National University College of Medicine) ;
  • Lee, Dongsoo (Dept. of Nuclear Medicine, Seoul National University College of Medicine)
  • Published : 2002.10.01
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Abstract

Subspace analysis is a popular method for multivariate data analysis and is closely related to factor analysis and principal component analysis (PCA). In the context of image processing (especially positron emission tomography), all data points are nonnegative and it is expected that both basis images and factors are nonnegative in order to obtain reasonable result. In this paper We present a sequential EM algorithm for rectified subspace analysis (subspace in nonnegativity constraint) and apply it to dynamic PET image analysis. Experimental results show that our proposed method is useful in dynamic PET image analysis.

Keywords