公开(公告)号：US12181618B2

公开(公告)日：2024-12-31

申请号：US17786193

申请日：2020-12-23

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Christoph Herrmann ,  Yoad Yagil ,  Roger Steadman Booker

IPC: A61B6/42 ,  A61B6/03 ,  G01T1/24

Abstract: Disclosed herein is a radiological instrument (100, 200, 300, 400, 600, 700, 800) comprising at least one pulse shaper circuit (102) configured for a direct conversion radiation detector (108). The at least one pulse shaper circuit comprises an amplifier (110). The pulse shaper further comprises a feedback circuit (118) connected in parallel with the amplifier; a first switching unit (120) connected in series with the feedback circuit; a second switching unit (122) connected in parallel with the amplifier; a discriminator circuit (124) that provides a discriminator signal (128) when the output exceeds a controllable signal threshold; and a control unit (124) for controlling the first switching unit and the second switching unit, wherein the control unit controls the second switching unit such that a substantial part of the signal is integrated, when the second switching unit is closed.

公开(公告)号：US11089960B2

公开(公告)日：2021-08-17

申请号：US16632554

申请日：2018-07-27

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Nadav Hanan Shapira ,  Amiaz Altman ,  Yoad Yagil

IPC: A61B5/00 ,  A61B6/03 ,  G06T11/00

Abstract: A method for converting spectral CT datasets into electron density datasets with applications in the fields of medical image formation or radiation treatment planning. The method comprises a preparation method that fits free parameters of a generalized electron density prediction model based on obtained electron density values such as data on tissue substitutes, and a conversion method using the fitted parameter prediction model and spectrally decomposed CT data as first and second inputs, respectively. The method is particularly useful in dual-energy CT and more specifically in dual layer detector CT systems.