Computerimplementiertes Verfahren zur Ableitung von 3D-Bilddaten eines Rekonstruktionsvolumens und Computerlesbares Medium
Anmelder: Siemens Healthcare GmbH 🇩🇪
Details
- Veröffentlichungs-Nr.
- EP3779887
- Aktenzeichen
- EP19191233
- Anmeldetag
- 12. August 2019
- Veröffentlichung
- 19. Oktober 2022
- Erteilung
- 19. Oktober 2022
- Rechtsraum
- EP
- IPC
- G06T11/00
Abstract
A computer-implemented method of deriving 3D image data of a reconstruction volume from a plurality of 2D projections (P<sub>i</sub>) by means of filtered back-projection, comprises the steps of:- receiving a plurality of 2D projections (P<sub>i</sub>) of an imaged object, each 2D projection (P<sub>i</sub>) corresponding to a projection plane;- applying a filter to each of the 2D projections (P<sub>i</sub>) to yield filtered 2D projections (P̂ι); and- calculating a filtered back-projection density distribution (f) from the filtered 2D projections (P̂ι) by means of filtered back-projection. According to the invention, the computer-implemented method further comprises the steps of:- calculating at least one modified filtered back-projection density distribution (f<sub>C1</sub>, f<sub>C2</sub>) that is indicative of outlier values included in the filtered 2D projections (P̂ι) by means of filtered back-projection; and- calculating a revised filtered back-projection density distribution (f<sub>impr</sub>) as a weighted linear combination of the filtered back-projection density distribution (f) and the at least one modified filtered back-projection density distribution (f<sub>C1</sub>, f<sub>C2</sub>) .
Anmelder
- Firma
- Siemens Healthcare GmbH
- Land
- 🇩🇪 Deutschland
Deutsches Unternehmen mit Sitz in Erlangen, frühere Gesundheitssparte des Siemens-Konzerns. Entwickelte medizinische Bildgebungssysteme, Diagnostik und Laborlösungen für Kliniken und Praxen.
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