X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Reexamination Certificate
2005-09-13
2005-09-13
Bruce, David V. (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
C378S004000, C378S008000, C378S901000
Reexamination Certificate
active
06944259
ABSTRACT:
A three-dimensional image of an object scanned with a plurality of cone-beam projections from a number of source positions is reconstructed using a method wherein intermediate transform functions are obtained from two-dimensional images of radiation attenuation in the scanned object. The intermediate transform functions are then filtered over the two-dimensional attenuation images using a moving-frame technique. The second-order radial derivative of the Radon transform can then be backprojected to generate an intermediate, locally-reconstructed, three-dimensional image. After repetition of this process, the plurality of intermediate, locally reconstructed, three-dimensional images are summed to obtain an ultimate, reconstructed, three-dimensional image of the object.
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Bruce David V.
Gemmell Elizabeth
Massachusetts Institute of Technology
Mintz Levin Cohn Ferris Glovsky and Popeo P.C.
Sayre Robert J.
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