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Factor Analysis Query:

I have recently read a number of papers on the topic of factor
analysis/eigen-image analysis of dynamic (i.e. time-varying) medical
images, by authors including Barber, Bazin & Di Paola, Houston, Samal,
Unser and Van Daele. I am interested in collecting comments from
anyone who uses or has tried to use these methods to analyse
scintigraphic or other time-varying functional images. Is there any
(portable) software easily available for this kind of analysis?. I am
especially interested in methods of correcting factor images for
background that are automatic and do not require any operator
intervention.


If there is sufficient interest, I will summarise responses to this newsgroup.

Thanks

Sean
--------------------------------------------------------
Sean Marrett                     email: sean@pet.mni.mcgill.ca 
wb213, PET Unit, Montreal Neurological Institute.
3801 University St., Montreal, Quebec.	H3A 2B4 
                                 tel:(514)-398-1537,1996 Fax: 8948 

p.s. Some general refs, for anyone interested in the topic:


@Article{barber_80a,
  author = 	 "Barber, D.C.",
  title = 	 "The use of principal components in the quantitative
		  analysis of gamma camera dynamic studies",
  journal =	 pmb,
  year =	 1980,
  volume =	 25,
  number =	 2,
  pages =	 "283-292"
}

@Article{dipaola_82a,
  author = 	 "DiPaola, R. and Bazin, J.P. and Aubry, F. and
		  Aurengo, A. and Cavailloles, F. and Herry, J.Y. and
		  Kahn, E.",
  title = 	 "Handling of dynamic sequences in nuclear medicine",
  journal =	 "IEEE Transcation in Nuclear Science",
  year =	 1982,
  volume =	 "NS-29",
  pages =	 "1310-1321"
}

@InCollection{houston_91a,
  author = 	 "Houston, A.S. and Nijran, K.S.",
  title = 	 "A Quantitative Comparison of Current Methods of
		  Factor Analysis of Dynamic Structures {(FADS)} in
		  renal dynamic studies",
  booktitle =	 "Proceedings of the 12th Conference on Information
		  Processing in Medical Imaging",
  publisher =	 "Springer-Verlag",
  year =	 1991,
  editor =	 "Colchester, A.C.F and Hawkes, D.J.",
  volume =	 511,
  series =	 "Lecture Notes in Computer Science",
  pages =	 "386-397"
}

@InCollection{samal_91a,
  author = 	 "Samal, M. and Karny, M. and Zahaika, D.",
  title = 	 "Confirmatory Aspects in Factor Analysis of Image Sequences",
  booktitle =	 "Proceedings of the 12th Conference on Information
		  Processing in Medical Imaging",
  publisher =	 "Springer-Verlag",
  year =	 1991,
  editor =	 "Colchester, A.C.F and Hawkes, D.J.",
  volume =	 511,
  series =	 "Lecture Notes in Computer Science",
  pages =	 "397-407"
}

@Article{schmidlin_79a,
  author = 	 "Schmidlin, P.",
  title = 	 "Quantitative Evaluation and Imaging of Functions
		  using Pattern recognition techniques",
  journal =	 pmb,
  year =	 1988,
  volume =	 24,
  number =	 2,
  pages =	 "385-395"
}

@InProceedings{unser_88a,
  author = 	 "Unser, M. and Van Hammer, H. and De Muynck, P. and
		  Van Denhaute, E. and Cornelia, J.",
  title = 	 "{K}arhunen-{L}oeve Analysis of Dynamic Sequences of
		  Thermographic Images for early breast cancer detection",
  booktitle =	 "Proceedings CVPR 88",
  year =	 1988,
  organization = "IEEE"
}