公开(公告)号：US10656290B2

公开(公告)日：2020-05-19

申请号：US16300079

申请日：2017-05-27

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Herfried Karl Wieczorek ,  Cornelis Reinder Ronda ,  Roger Steadman ,  Matthias Simon

IPC: G01T1/24 ,  G01T1/20 ,  G01T1/202 ,  G01T1/164

Abstract: In the present invention a direct X-ray conversion layer comprises a material having a perovskite crystal structure. This is preferable since this enables constructing an X-ray detector with edge-on illuminated detector elements.

公开(公告)号：US10980506B2

公开(公告)日：2021-04-20

申请号：US16305529

申请日：2017-06-29

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Ewald Roessl ,  Roger Steadman ,  Christoph Herrmann ,  Roland Proksa

IPC: A61B6/00 ,  G01N23/046 ,  G01N23/083 ,  G06T11/00

Abstract: An image signal processing system (ISP) comprising an input interface (IN) for receiving photon counting projection data acquired by an X-ray imaging apparatus (IA) having a photon counting detector (D). A calibration data memory (CMEM) of the system holds calibration data. The calibration data encodes photon counting data versus path lengths curves for different energy thresholds of i) said detector (D) or ii) of a different detector. At least one of said curves is not one-to-one. A path length convertor (PLC) of the system converts an entry in said photon counting projection data into an associated path length based on said calibration data.