SURROGATE PHANTOM FOR DIFFERENTIAL PHASE CONTRAST IMAGING

摘要

A phantom material may be irradiated with varying energy x-rays to determine its phase shift properties. A determination of the difference between those phase shift properties and the phase shift properties of another material of interest can be represented and stored in terms of a polynomial function. The stored function can then be used in combination with a surrogate phantom shaped in the form of another object to obtain the phase shift properties of that other object as if it were made from the material of interest.

主权项

1. A method comprising:
irradiating with x-rays a phantom material having a volume formed into a preselected shape; measuring a phase shift in the x-rays that have passed through the volume of phantom material; and modifying the measured phase shift in the x-rays using a predetermined polynomial to obtain a phase shift of a material of interest.