Per Harald Bergfjord,Duncan Neil Bourne,Stephen Young
申请号：
US13717792
公开号：
US20140169519A1
申请日:
2012.12.18
申请国别(地区):
US
年份:
2014
代理人:
摘要：
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.
