X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1993-11-12
1995-10-31
Porta, David P.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378901, 36441315, 36441319, A61B 603, G01N 2308
Patent
active
054636663
ABSTRACT:
Imaging of a region of interest within a larger object is accomplished without the need for determining Radon derivatives of portions of the object outside a field of view which generally corresponds to the region of interest. The field of view and region of interest may be relatively large compared to a relatively small area detector used for the imaging. In order to provide a complete data set satisfying Radon completeness requirements with little or no collection of data from outside the region of interest, a source scanning trajectory uses a first circle, a second circle, and a helical portion connecting the first and second circles. The first and second circle and helical portion define a cylinder which is outside and surrounding the field of view, which is likewise a cylinder.
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Eberhard Jeffrey W.
Tam Kwok C.
Bruce David Vernon
General Electric Company
Porta David P.
Webb II Paul R.
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