Reduced field-of-view CT system for imaging compact embedded str

Details Reduced field-of-view CT system for imaging compact embedded str Reduced field-of-view CT system for imaging compact embedded str

1994-03-22

1996-01-16

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 4, H05G 160

Patent

active

054854920

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.

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Vertebral Bone Mineral Analysis: An Integrated Approach With CT.sup.1, Willi A. Kalendar, PhD. 1985 RSNA Annual Meeting.
Generalized Image Combinations In Dual KVP Digital Radiography, A. L. Lehmann et al., Med. Phys. 8(5) Sep./Oct. 1981.

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