Phase-contrast x-ray imaging systems and methods

Details Phase-contrast x-ray imaging systems and methods Phase-contrast x-ray imaging systems and methods

2005-06-29

2008-08-12

Kiknadze, Irakli (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Absorption

C378S068000, C378S098800

Reexamination Certificate

active

07412026

ABSTRACT:
The present invention relates systems and methods for phase-contrast x-ray imaging of an object. In one embodiment, the system includes an x-ray source, a detector, and an object-map generator. The x-ray source transmits x-rays, and the detector is positioned so as to receive at least a portion of the x-rays transmitted by the x-ray source and output an image signal indicative of an intensity measurement of the x-rays received. The object is positioned between the x-ray source and the detector. The detector is then used to acquire intensity measurements at two different positions and output the same to the object-map generator. The object-map generator then utilizes the image signals of the detector, along with algorithms, including phase-retrieval algorithms to generate an attenuation-map and a phase-map for the object. The present invention also include systems and methods utilizing a dual-detector arrangement, a multi-source arrangement, and a mosaic source-detector arrangement.

REFERENCES:
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patent: 2006/0015952 (2006-01-01), Filvaroff
patent: 2006/0109949 (2006-05-01), Tkaczyk et al.
Xizeng Wu and Hong Liu, “A general theoretical formalism for X-ray phase contrast imaging”, Journal of X-ray Science and Technology 11 (2003), IOS Press, pp. 33-42.
Xizeng Wu and Hong Liu, “An experimental method of determining relative phase-contrast factor for x-ray imaging systems”, Med. Phys. 31 (5), May 2004; 2004 Am. Assoc. Phys. Med., pp. 997-1002.

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