Method for producing and applying an antiscatter grid or...

Details Method for producing and applying an antiscatter grid or... Method for producing and applying an antiscatter grid or...

2006-12-12

2006-12-12

Ho, Allen C. (Department: 2882)

X-ray or gamma ray systems or devices

Beam control

Collimator

C378S154000, C264S401000, C264S497000

Reexamination Certificate

active

07149283

ABSTRACT:
A method is for producing and applying an antiscatter grid or collimator to an x-ray or gamma detector having matricially arranged detector elements which form a detector surface with detection regions sensitive to x-radiation and/or gamma radiation and less sensitive intermediate regions. In the method, a basic structure is firstly produced for the antiscatter grid or collimator by way of a rapid prototyping technique, through which transmission channels and intermediate walls of the antiscatter grid or collimator are formed which have at least in a first direction a center-to-center spacing which is equal to or an integral multiple of a center-to-center spacing of the sensitive detection regions of the detector. The intermediate walls are coated with a material which strongly absorbs x-radiation and/or gamma radiation in order to finish the antiscatter grid or collimator. Subsequently, the antiscatter grid or collimator is applied to the detector surface and connected to the detector surface in such a way that at least the intermediate walls running perpendicular to the first direction, or their coating, are situated over the less sensitive intermediate regions of the detector surface. A detector having an antiscatter grid or collimator in which no moiré interference occurs can thus be realized in a simple way.

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G.A. Kastis et al., “A Small-Animal Gamma-Ray Imager Using a Cdznte Pixel Array and a High Resolution Parallel Hole Collimator”, Jan. 7, 2002.
Gebhardt, Andreas. “Rapid Prototyping.” Hanser Gardner Publications, Munich, Germany, 2003.

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