Method and device for volumetric image reconstruction

Details Method and device for volumetric image reconstruction Method and device for volumetric image reconstruction

2008-03-04

2008-03-04

Kao, Chih-Cheng G (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S901000

Reexamination Certificate

active

07340028

ABSTRACT:
The reconstruction of computer tomography data is very often based on a parallel rebinning step of the projection data prior to the filtered back projection. In case of cardiac reconstruction, a gating technique is applied to select appropriate projections for a time-dependent image reconstruction. Usually, the gating window is a function of the fan-beam/cone-beam projection only. According to the present invention, a function corresponding to the location on the detector surface, where the respective projection was detected is used to further verify whether the respective projection is truly within the selected gating window or not.

REFERENCES:
patent: 6104775 (2000-08-01), Tuy
patent: 6343108 (2002-01-01), Heuscher
patent: 6522712 (2003-02-01), Yavuz et al.
patent: 2002/0122529 (2002-09-01), Heuscher
Grass, M., et al.; Helical cardiac cone beam reconstruction using retrospective ECG gating; 2003; Phys. Med. Biol.; 48:3069-3084.
Kachelriess, M., et al.; ECG-correlated image reconstruction from subsecond multi-slice spiral CT scans of the heart; 2000; Med. Phys; 27(8):1881-1902.
Proksa, R., et al.; The n-PI-Method for Helical Cone-Beam CT; 2000; IEEE Trans. on Med. Imag.; 19(9):848-863.

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