Method and system for reconstructing image volumes from...

Details Method and system for reconstructing image volumes from... Method and system for reconstructing image volumes from...

2007-04-25

2009-10-27

Glick, Edward J (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S015000

Reexamination Certificate

active

07609802

ABSTRACT:
A method, computed tomography (CT) system and computer-readable medium for reconstructing an image volume of an object scanned in helical mode. An embodiment of the method includes determining discrete focal lengths within an imaging plane of the reconstructed field of view comprising the image volume; generating a circular scan sinogram(s) for the discrete focal lengths by interpolating the helical views; selecting within a backprojection operation a circular scan sonogram(s), for one or more image points within the imaging plane, over one or more circular views. The method then includes using the selected circular scan sinogram(s), in the backprojection of the image points point(s) over the circular views view(s) and performing a backprojection for all the image points over all the circular views to generate a reconstructed image of the object.

REFERENCES:
patent: 6256366 (2001-07-01), Lai
patent: 6285733 (2001-09-01), Proksa et al.
patent: 6415012 (2002-07-01), Taguchi et al.
patent: 6418184 (2002-07-01), Wang et al.
Turbell et al., Helical Cone-Beam Tomography, Image Processing Laboratory, Department of Electrical Engineering, Linkoping University, 2000, pp. 91-100.
Tang et al., A three-dimensional-weighted cone beam filtered backprojection (CB-FBP) algorithm for image reconstruction in volumetric CT—helical scanning, Physics in Medicine and Biologry, 51, 2006, pp. 855-874.

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