X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Reexamination Certificate
2006-03-28
2006-03-28
Glick, Edward J. (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
C378S010000
Reexamination Certificate
active
07020232
ABSTRACT:
A scanning electron beam computed tomographic system eliminates axial offset between target and detector by disposing the target, collimator, and detector such that active portions of the target and detector are always diametrically opposite each other. This result is achieved by providing a helical target, collimator, and detector, or by providing planar target, collimator, and detector components that are inclined relative to the vertical axis such that active portions of the target and detector are always diametrically opposite each other. Either configuration eliminates cone beam error and the necessity to correct for same. Further, the system can provide multi-slice scanning of an object that is in constant motion at a critical velocity, without having to interpolate data. Conventional helical scanning may still be undertaken. Detector elements can be disposed axially to improve signal
oise ratio and to produce a cone beam cancellation effect.
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Boyd Douglas P.
Harman Jonathan
Rand Roy E.
Dellapenna Michael A.
GE Medical Systems Global Technology Company LLC
Glick Edward J.
McAndrews Held & Malloy Ltd.
Thomas Courtney
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