Reduced field-of-view system for imaging compact embedded struct

Details Reduced field-of-view system for imaging compact embedded struct Reduced field-of-view system for imaging compact embedded struct

1993-04-22

1994-03-29

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 4, H05G 160

Patent

active

052992489

ABSTRACT:
A CT apparatus for scanning compact structures associated with a larger body uses radiation source producing a reduced field-of-view to simplify construction and reduce exposure of the larger body. Truncation artifacts in the reconstructed image caused by volume elements in the larger body imaged by the radiation beam only for projections at some angles, are reduced by acquiring two projections at two different energies and combining those projections to compensate for the attenuation of the radiation by the volume elements of the larger body.

REFERENCES:
patent: 3848130 (1974-11-01), Macovski
patent: 3965358 (1976-06-01), Macovski
patent: 4029963 (1977-06-01), Alvarez et al.
patent: 4506327 (1985-03-01), Tam
patent: 4550371 (1985-10-01), Glover et al.
Generalized Image Combinations In Dual KVP Digital Radiography, A. L. Lehmann et al., Med. Phys. 8(5) Sep./Oct. 1981.

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