Differential phase contrast imaging with energy sensitive detection
AssigneeKoninklijke Philips N.V.
InventorsThomas Koehler, Jens-Peter Schlomka
Life of this patent
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Abstract
For correcting differential phase image data 52, differential phase image data 52 acquired with radiation at different energy levels is received, wherein the differential phase image data 52 comprises pixels 60, each pixel 60 having a phase gradient value 62a, 62b, 62c for each energy level. After that an energy dependent behavior of phase gradient values 62a, 62b, 62c of a pixel 60 is determined and a corrected phase gradient value 68 for the pixel 60 is determined from the phase gradient values 62a, 62b, 62c of the pixel 60 and a model for the energy dependence of the phase gradient values 62a, 62b, 62c.
Claims14
A method for correcting differential phase image data (52), the method comprising the steps of
- Receiving differential phase image data (52) acquired with radiation at different energy levels (E−1, E0, E1), wherein the differential phase image data (52) comprises pixels (60), each pixel (60) having a phase gradient value (62a, 62b, 62c) for each energy level (E−1, E0, EI);
- Determining an energy dependent behavior (44a to 44g) of phase gradient values (62a, 62b, 62c) of a pixel (60);
- Determining a corrected phase gradient value (68) for the pixel (60) from the phase gradient values (62a, 62b, 62c) of the pixel (60) and a model for the energy dependence of the phase gradient values (62a, 62b, 62c).
Dependencies are inferred from the claim text.