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US 2018/0294065 A1Published application
Focussing of gratings for differential phase contrast imaging by means of electro-mechanic transducer foils
AssigneeKoninklijke Philips N.V.
InventorsGERHARD MARTENS, UDO VAN STEVENDAAL
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Abstract
A grating assembly (GAi) for use in phase contrast imaging applications in an X-ray imager (IM). The assembly (GAi) includes an electrostrictive layer coupled to the grating structure (Gi) of the assembly (GAi). Via said coupling, ridges (RG) of the gratings structure can be deformed into alignment with the focal spot (FS) of the X-ray source (XR) of the imager (IM). This allows reducing X-radiation shadowing effects.
Claims14
A grating assembly, comprising:
- a grating structure configured to modify X-ray radiation;
- and
- a layer of electrostrictive material coupled to a first face of said grating structure, wherein at least a part of the grating structure is deformable upon application of a voltage across the layer of electrostrictive material, wherein the first face of the grating structure and an opposing face of the electrostrictive layer are structured so as to interlock with each other.
(canceled)
An X-ray imaging apparatus, comprising:
- an X-ray source configured to emit X-ray radiation from a focal spot;
- and
- a grating assembly comprising a grating structure configured to modify the X-ray radiation;
- and a layer of electrostrictive material coupled to a first face of the grating structure, wherein at least a part of the grating structure is deformable upon application of a voltage across the layer of electrostrictive material, wherein the first face of the grating structure and an opposing face of the electrostrictive layer are structured so as to interlock with each other.
1 more element
A method of manufacture of a grating assembly, comprising:
- providing a grating structure comprising a base substrate with a plurality of ridges projecting away from said base substrate, said grating structure having respective tip portions and respective base portions distal from said tip portions, said plurality of ridges transitioning into said base substrate via said respective base portions;
- and
- mounting a layer of electrostrictive material onto said tip portions.
Dependencies are inferred from the claim text.