0376737 20240103200845.920120511235959.9 000312384100040 10.1109/ISBI.2012.6235508 4 s. P cav_un_epca*0376736978-1-4577-1858-8158-161Barcelona, SpainIEEE2012 Blind Source Separation Dynamic Medical Imaging Factor Analysis Regions of Interest Renal Scintigraphy cav_un_auth*0101207 Šmídl Václav Adaptivní systémy Department of Adaptive Systems AS AS UTIA-B Department of Adaptive Systems Ústav teorie informace a automatizace AV ČR, v. v. i. cav_un_auth*0267768 Tichý Ondřej Adaptivní systémy Department of Adaptive Systems AS AS UTIA-B Department of Adaptive Systems Ústav teorie informace a automatizace AV ČR, v. v. i. http://library.utia.cas.cz/separaty/2012/AS/smidl-automatic regions of interest in factor analysis for dynamic medical imaging.pdf 302710 GA UK CZ cav_un_auth*0280958 CEZ:AV0Z10750506 Factor Analysis (FA) is a well established method for factors separation in analysis of dynamic medical imaging. However, its assumptions are valid only in limited regions of interest (ROI) in the images which must be selected manually or using heuristics. The resulting quality of separation is sensitive to the choice of these ROI. We propose a new probabilistic model for functional analysis with inherent estimation of probabilistic ROI. The model is solved using the Variational Bayes method which provides also automatic relevance determination of the estimated factors. Performance of the method is demonstrated on data from renal scintigraphy, where a significant improvement is achieved. Since there are no scintigraphy-related assumptions, the method can be used in any other imaging modality. cav_un_auth*0280957 2012 IEEE International Symposium on Biomedical Imaging Barcelona 02.05.2012-05.05.2012 ES 2013 BB PO http://hdl.handle.net/11104/0209064 n.a. Proceedings Paper Engineering Electrical Electronic|Radiology Nuclear Medicine Medical Imaging 2012 000312384100040 WOS cav_un_epca*0376736 Proceedings of 2012 IEEE International Symposium on Biomedical Imaging 978-1-4577-1858-8 158 161 Proceedings of 2012 IEEE International Symposium on Biomedical Imaging Barcelona, Spain IEEE 2012