PHACT - Phase-Contrast Tomography

Motivation

X-rays contain not only information about the absorption properties of a sample but also about the influences of the object material on the phases of the X-ray beams. In the last decades many different approaches have been invented to measure this information. They can be classified in three groups: interferometry, diffractometry and in-line holography. Subject of our research is an approach of the group interferometry, the so called Talbot-grating interferometry [1]. It's one of the first phase-contrast imaging systems which has the potential to be applied in a medical environment.

Differential Phase-Contrast Imaging

Following images were taken in our Lab at the ECAP Institute. Figure 1 shows a small fish and Figure 2 a rasin. Both data were acquired with a 80 keV tungsten spectrum and the Medipix 2 detector. The images show from left to right the differential phase-contrast image, absorption image and a so called dark-field image.

Figure 1: From left to right: differential phase-contrast image, absorption image and dark-field image of a small fish

Figure 2: From left to right: differential phase-contrast image, absorption image and dark-field image of a raisin

References

F. Pfeiffer, T.Weitkamp, O. Bunk, C. David, "Phase retrieval and differential phase-contrast imaging with low-brilliance x-ray sources," Nature Phys. 2, 258-261, 2006

Contact

Address

Dipl.-Inf. Wilhelm Haas

Researcher in the Medical Image Reconstruction group at the Pattern Recognition Lab of the Friedrich-Alexander University Erlangen-Nuremberg

PHACT - Phase-Contrast Tomography

Motivation

Differential Phase-Contrast Imaging

References





Department of Computer Science 5 Our Team Haas, Wilhelm Projects Publications Research Publications Free Software Data Courses Curriculum Theses Press Releases Cooperations Open Positions LME Videos Ph.D. Gallery Contact Intranet Contact +49 9131 85 25247 +49 9131 303811 09.155 Address University of Erlangen-Nuremberg Chair of Computer Science 5 (Pattern Recognition) Martensstrasse 3 91058 Erlangen Germany Driving directions Powered by	Dept. of Computer Sc. » Pattern Recognition » Our Team » Haas, Wilhelm Dipl.-Inf. Wilhelm Haas Researcher in the Medical Image Reconstruction group at the Pattern Recognition Lab of the Friedrich-Alexander University Erlangen-Nuremberg PHACT - THE NEXT GENERATION PHACT - Phase-Contrast Tomography Motivation X-rays contain not only information about the absorption properties of a sample but also about the influences of the object material on the phases of the X-ray beams. In the last decades many different approaches have been invented to measure this information. They can be classified in three groups: interferometry, diffractometry and in-line holography. Subject of our research is an approach of the group interferometry, the so called Talbot-grating interferometry [1]. It's one of the first phase-contrast imaging systems which has the potential to be applied in a medical environment. read more about PHACT ... Differential Phase-Contrast Imaging Following images were taken in our Lab at the ECAP Institute. Figure 1 shows a small fish and Figure 2 a rasin. Both data were acquired with a 80 keV tungsten spectrum and the Medipix 2 detector. The images show from left to right the differential phase-contrast image, absorption image and a so called dark-field image. Figure 1: From left to right: differential phase-contrast image, absorption image and dark-field image of a small fish Figure 2: From left to right: differential phase-contrast image, absorption image and dark-field image of a raisin read more about PHACT ... References F. Pfeiffer, T.Weitkamp, O. Bunk, C. David, "Phase retrieval and differential phase-contrast imaging with low-brilliance x-ray sources," Nature Phys. 2, 258-261, 2006