Thomas Koehler,Ewald Roessl,Rolf Karl Otto Behling,Peter Benjamin THeodor Noel,Franz Pfeiffer
申请号：
US15524112
公开号：
US10485492B2
申请日:
2015.11.10
申请国别(地区):
US
年份:
2019
代理人:
摘要：
The invention relates to a source-detector arrangement (11) of an X-ray apparatus (10) for grating based phase contrast computed tomography. The source-detector arrangement comprises an X-ray source (12) adapted for rotational movement around a rotation axis (R) relative to an object (140) and adapted for emittance of an X-ray beam of coherent or quasi-coherent radiation in a line pattern (21)； and an X-ray detection system (16) including a first grating element (24) and a second grating element (26) and a detector element (6)； wherein the line pattern of the radiation and a grating direction of the grating elements are arranged orthogonal to the rotation axis； and wherein the first grating element has a first grating pitch varied dependent on a cone angle (β) of the X-ray beam and/or the second grating element has a second grating pitch varied dependent on the cone angle of the X-ray beam.
