公开(公告)号：US20240050048A1

公开(公告)日：2024-02-15

申请号：US18267470

申请日：2021-12-07

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： THOMAS KOEHLER ,  STEFAN LEONHARD LOESCHER ,  GEREON VOGTMEIER ,  ANDRE BRAUNAGEL

IPC: A61B6/08 ,  A61B6/00

CPC classification number: A61B6/08 ,  A61B6/484 ,  A61B6/4035

Abstract: GC A phase contrast X-ray imaging system with field of view (FOV) visualization and a holder arranged to hold a grating and a light field projector to enable the FOV illumination, for an operator to visualize the region on a subject that will be irradiated with X-rays. By taking advantage of the holder of the necessary object in the X-ray beam path (i.e. the grating) to hold a light field projector to illuminate the FOV, the solution is naturally more compact to implement and the mechanical complexity is kept to a minimum. The light field projector provides a sharp, well-defined area with a distinct outline of the FOV.

公开(公告)号：US20230221265A1

公开(公告)日：2023-07-13

申请号：US18008646

申请日：2021-06-02

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： THOMAS PRALOW ,  THOMAS KOEHLER ,  STEFAN LEONHARD LOESCHER

IPC: G01N23/041 ,  A61B6/00 ,  G21K1/06

CPC classification number: G01N23/041 ,  A61B6/44 ,  A61B6/586 ,  G21K1/06 ,  G21K2207/005 ,  G21K2201/067

Abstract: An imaging system (IS) including device (G, IFD) for phase contrast and/or dark field imaging such as a grating (G). The device has a periodic structure with a spatial period p. The imaging system (IS) further includes a phase stepping mechanism (PSM) configured to facilitate a relative phase stepping motion between the device (G, IFD) and a focal spot (FS) of an X-ray source (XS) of the imaging system (IS). The relative phase stepping motion covers a distance greater than the said spatial period to reduce artifacts in dark-field or phase contrast imagery caused by defects in the grating.