Název: Model Consideration for Blind Source Separation of Medical Image Sequences
Autoři: Tichý, Ondřej
Typ dokumentu: Příspěvky z konference
Konference/Akce: Doktorandské dny 2012, Praha (CZ), 2012-11-16 / 2012-11-23
Rok: 2012
Jazyk: eng
Abstrakt: The problem of functional analysis of medical image sequences is studied. The obtained images are assumed to be a superposition of images of underlying biological organs. This is commonly modeled as a Factor Analysis (FA) model. However, this model alone allows for biologically impossible solutions. Therefore, we seek additional biologically motivated assumptions that can be incorporated into the model to yield better solutions. In this paper, we review additional assumptions such as convolution of time activity, regions of interest selection, and noise analysis. All these assumptions can be incorporated into the FA model and their parameters estimated by the Variation Bayes estimation procedure. We compare these assumptions and discuss their influence on the resulting decomposition from diagnostic point of view. The algorithms are tested and demonstrated on real data from renal scintigraphy; however, the methodology can be used in any other imaging modality.
Klíčová slova: Blind Source Separation; Convolution; Factor Analysis; Image Sequence; Regions of Interest
Zdrojový dokument: Doktorandské dny 2012, ISBN 978-80-01-05138-2

Instituce: Ústav teorie informace a automatizace AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný na externích webových stránkách.
Externí umístění souboru: http://library.utia.cas.cz/separaty/2012/AS/tichy-model consideration for blind source separation of medical image sequences.pdf
Původní záznam: http://hdl.handle.net/11104/0213299

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-135075


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav teorie informace a automatizace
Konferenční materiály > Příspěvky z konference