H Sůrová

Charles University

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MŠ

Martin Šámal

General University Hospital in Prague

Miroslav Kárný

Czech Academy of Sciences, Institute of Information Theory and Automation

Z Dienstbier

Charles University

E Maríková

Charles University

P Svihovcová

Charles University

J Pradácová

Charles University

Petr Pěnička

Charles University

K Michalová

University of Sydney

H Kopřivová

Charles University

František Novák

Charles University

Cooperative Institutions

Charles University

Czech Academy of Sciences, Institute of Biophysics

Institute of Clinical and Experimental Medicine

General University Hospital in Prague

Iscare I.V.F

Czech Academy of Sciences, Institute of Organic Chemistry and Biochemistry

University Hospital Kralovske Vinohrady

Czech Academy of Sciences

Masaryk University

Hospital Jihlava

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Three-dimensional cold spot volume rendering

European Journal of Nuclear Medicine (1993)

H Sůrová Ivan Šup

Cold spot

Maximum intensity projection

Spots

10.1007/bf00173490

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Citations (0)

On the existence of an unambiguous solution in factor analysis of dynamic studies

Physics in Medicine and Biology (1989)

Martin Šámal Miroslav Kárný H Sůrová Petr Pěnička E Maríková

Achievement of an unambiguous solution in factor analysis of dynamic radionuclide studies depends on constraints reflecting the known properties of factors. The constraints should be tight enough to prevent ambiguity but sufficiently general in order to ensure the data-based derivation of factors. In dynamic scintigraphy, the non-negativity of factors is their essential property which is implied by the physical nature of measured quantities. Considering factors as the images of compartments in the distribution space of a radiopharmaceutical (i.e. performing the factor analysis in the spatial domain), a powerful additional constraint can be applied. This constraint is based on the presence of segments in the image matrix where the subtotal number of compartments is projected. Using this constraint, the existence of physiologically related unique solution in factor analysis can be proved providing the number of factors is chosen properly.

Factor (programming language)

Matrix (chemical analysis)

Dynamic factor

10.1088/0031-9155/34/2/006

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Citations (20)

Determination of left ventricular wall motility injury by factor analysis in patients with advanced ischemic heart disease

European Journal of Nuclear Medicine (1989)

J Kasalický J Kidéry B Vavrejn H Sůrová I. Málek

Ischemic injury

10.1007/bf00255494

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