X-ray CT system to generate tomographic phase contrast or...

Details X-ray CT system to generate tomographic phase contrast or... X-ray CT system to generate tomographic phase contrast or...

2011-08-30

2011-08-30

Kao, Chih-Cheng G (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

Reexamination Certificate

active

08009796

ABSTRACT:
An x-ray CT system that generates tomographic phase contrast or dark field exposures, has at least one grating interferometer with three grating structures arranged in series in the radiation direction, with a modular design of the second and third grating structures. The distance between the first grating structure of the x-ray source and the second grating structure (fashioned as a phase grating) of the respective grating/detector modules is adapted, depending on the fan angle, corresponding to a period of the grating structure of the x-ray source projected onto the grating detector module at a respective fan angle (φi).

REFERENCES:
patent: 2007/0153979 (2007-07-01), Baumann et al.
patent: 2007/0183562 (2007-08-01), Popescu et al.
patent: 2007/0183583 (2007-08-01), Baumann et al.
patent: 1 731 099 (2006-12-01), None
patent: WO 2007/074029 (2007-07-01), None
“Hard-X-Ray Dark-Field Imaging Using a Grating Interferometer,” Pfeiffer et al, Nature Materials, vol. 7 (2008) pp. 134-137.

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