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Aspelmeier, T.* ; Ebel, G.* ; Hoeschen, C.

Tomographic imaging using poissonian detector data.

Schutzrecht WO 2011/091815 A1 (2011)
An image reconstruction method for reconstructing a tomographic image (f j ) of a region of investigation within an object (1), comprises the steps of providing detector data (y i ) comprising Poisson random values measured at an i-th of a plurality of different positions, e.g. i = (k,l) with pixel index k on a detector device and angular index l referring to both the angular position (a l ) and the rotation radius (r l ) of the detector device (10) relative to the object (1), providing a predetermined system matrix A ij assigning a j-th voxel of the object (1) to the i-th detector data (y i ), and reconstructing the tomographic image (f j ) based on the detector data (y i ), said reconstructing step including a procedure of minimizing a functional F(f) depending on the detector data (y i ) and the system matrix A ij and additionally including a sparse or compressive representation of the object (1) in an orthobasis T, wherein the tomographic image (f j ) represents the global minimum of the functional F(f). Furthermore, an imaging method and an imaging device using the image reconstruction method are described.
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Publikationstyp Sonstiges: Patent
Veröffentlichungsdatum 2011-08-04
Veröffentlichungsnummer WO 2011/091815 A1
Anmeldedatum 2010-01-28
Anmelder/Inhaber Aspelmeier, T.; Ebel, G.; Helmholtz Zentrum München, Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH); Hoeschen, C.; Scivis Wissenschaftliche Bildverarbeitung GmbH
Anmeldeland EP
Priorität EP2010000526