Cone-beam CT Scanning
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United States of America Patent
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Issued Date -
Jun 19, 2014
app pub date -
Dec 18, 2012
filing date -
Dec 18, 2012
priority date (Note) -
Abandoned
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Abstract
Combined systems that rely on a single source able to switch between therapeutic emissions and diagnostic emissions for a cone-beam CT scanner can be improved by rotating the collimator during CT scanning to allow a wider maximum aperture. The detector can also be positioned in an offset manner so as to take best advantage of this aperture. The rotated position for a collimator with a rectangular aperture (such as a square) can be one in which a diagonal of the aperture lies transverse to the plane swept out by the beam axis during rotation of the mount. More generally, where the aperture has at least one straight edge, the predetermined position is one in which the straight edge lies at an oblique angle to the plane swept out by the beam axis during rotation of the mount.
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