Patent · US Active

Monochromatic attenuation contrast image generation by using phase contrast CT

US9842414B2 · kind B2 · utility

18Cited by

2References

14Claims

0Family size

Assignee

KONINIKLIJKE PHILIPS N.V. · NL

Inventors

Thomas Koehler · Norderstedt, DE
Ewald Roessl · Ellerau, DE
Dirk Schäfer · Hamburg, DE

Key dates

Filing date	Jul 23, 2014
Grant date	Dec 12, 2017
Priority date	—
Expiry date	Nov 18, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG21K2207/005
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The present invention relates to a method and apparatus for X-ray phase contrast imaging. The method comprises the following steps: from the measured phase gradient and overall attenuation information, an electron density is computed; the contribution pc of the Compton scattering to the overall attenuation is estimated from the electron density; the contribution pp of the photo-electric absorption to the overall attenuation is estimated from the overall attenuation and the contribution pc; the values pc and pp are used to reconstruct a Compton image and a photo-electric image; by linear combination of these two images, a monochromatic image at a desired energy is obtained.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.