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System for generating spectral computed tomography projection data
专利权人:
发明人:
Heiner Daerr,Roger Steadman Booker,Gereon Vogtmeier,Ewald Roessl,Gerhard Martens,Carolina Ribbing
申请号:
US15108401
公开号:
US09833202B2
申请日:
2015.12.01
申请国别(地区):
US
年份:
2017
代理人:
摘要:
The invention relates to a system (31) for generating spectral computed tomography projection data. A spectral projection data generation device (6) comprising an energy-resolving detector generates spectral computed tomography projection databased on polychromatic radiation (4), which has been provided by a radiation device (2), after having traversed an examination zone (5), and a reference values generation device generates energy-dependent reference values based on radiation, which has not traversed the examination zone. A spectral parameter providing unit (12) provides a spectral parameter being indicative of a spectral property of the radiation device based on the energy-dependent reference values. In particular, spectral properties of the radiation device can be monitored over time, wherein this information can be used for, for instance, correcting the spectral computed tomography projection data, and/or, if undesired spectral properties of the radiation device are indicated, triggering a replacement of the radiation device.
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