Quantitative comparison between two phase contrast techniques: diffraction enhanced imaging and phase propagation imaging.
Two x-ray phase contrast imaging techniques are compared in a quantitative way for future mammographic applications: diffraction enhanced imaging (DEI) and phase propagation imaging (PPI). DEI involves, downstream of the sample, an analyser crystal acting as an angular filter for x-rays refracted by the sample. PPI simply uses the propagation (Fresnel diffraction) of the monochromatic and partially coherent x-ray beam over large distances. The information given by the two techniques is assessed by theoretical simulations and compared at the level of the experimental results for different kinds of samples (phantoms and real tissues). The imaging parameters such as the energy, the angular position of the analyser crystal in the DEI case or the sample to detector distance in the PPI case were varied in order to optimize the image quality in terms of contrast, visibility and figure of merit.
Pagot
Elodie
E
European Synchrotron Radiation Facility, 6 rue Horowitz, BP220, F-38043 Grenoble, France. elodie.pagot@jrc.it
Fiedler
Stefan
S
Cloetens
Peter
P
Bravin
Alberto
A
Coan
Paola
P
Fezzaa
Kamel
K
Baruchel
José
J
Härtwig
Jürgen
J
von Smitten
Karl
K
Leidenius
Marjut
M
Karjalainen-Lindsberg
Marja-Liisa
ML
Keyriläinen
Jani
J
D001943:Breast Neoplasms / Q000000981:diagnostic imaging*; D002114:Calcinosis / Q000000981:diagnostic imaging*; D006801:Humans; D008327:Mammography / Q000295:instrumentation / Q000379:methods*; D019047:Phantoms, Imaging; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014961:X-Ray Diffraction / Q000295:instrumentation / Q000379:methods*