X-ray scatter elimination by frequency shifting

Details X-ray scatter elimination by frequency shifting X-ray scatter elimination by frequency shifting

2006-05-16

2006-05-16

Glick, Edward J. (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S019000, C378S154000

Reexamination Certificate

active

07046757

ABSTRACT:
A method for separating and filtering noise caused by X-ray scatter contaminations from the primary signal component of the signal produced by the detector assembly of a radiographic imaging device employs a scatter removal screen or grating disposed between the object being imaged and the detector assembly. The grating has an absorption that varies periodically for varying the intensity of the X-ray radiation passed through the grating. This variation in intensity of the X-ray radiation causes the signal produced by the detector assembly to be amplitude modulated so that the frequency of the primary signal component is shifted from noise components of the signal caused by X-ray scatter contamination allowing the noise components to be filtered from the primary signal component so that scatter induced noise may be reduced or eliminated from the signal.

REFERENCES:
patent: 6826256 (2004-11-01), Inoue

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