Air cross grids for X-ray imaging
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United States of America Patent
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-
Jun 13, 2000
Issued Date -
N/A
app pub date -
Feb 10, 1998
filing date -
May 9, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Air cross grids, for absorbing scattered secondary radiation and improving radiation imaging in general radiography and in mammography, are provided with a large plurality of open air passages extending through each grid panel. These passages are defined by two large pluralities of substantially parallel partition walls, respectively extending transverse to each other. Each grid panel is made by laminating a plurality of thin metal foil sheets photo-etched to create through openings defined by partition segments. The etched sheets are aligned and bonded to form the laminated grid panel, which is moved edgewise during the radiation exposure to pass primary radiation through the air passages while absorbing scattered secondary radiation arriving along slanted paths.
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