Adaptive detector masking for speed-up of cone beam reconstructi

Details Adaptive detector masking for speed-up of cone beam reconstructi Adaptive detector masking for speed-up of cone beam reconstructi

1997-06-30

1999-03-02

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 94, A61B 603

Patent

active

058781030

ABSTRACT:
A scanning and data acquisition technique for three dimensional (3D) computerized tomographic (CT) imaging of an object, wherein scanning at a plurality of positions along a source scanning trajectory causes an area detector to acquire cone beam projection data corresponding to a shadow of said object at each of scanning positions and Radon derivative data is calculated by processing line integral values from cone beam projection data. In order to improve the calculation efficiency of the Radon derivative calculation, calculation of the Radon derivative data uses a determination of the left and right boundaries of the shadow for each of the scanning positions, and calculates the Radon derivative data only using projection data from within the determined boundaries.

REFERENCES:
patent: 5333164 (1994-07-01), Tam
patent: 5390111 (1995-02-01), Tam
patent: 5390226 (1995-02-01), Tam
patent: 5461650 (1995-10-01), Tam
patent: 5463666 (1995-10-01), Eberhard et al.
patent: 5504792 (1996-04-01), Tam

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