Photon counting spectral CT

US11435488B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Roger Steadman Booker · Aachen, DE
• Christoph Herrmann · Aachen, DE
• Klaus Erhard · Hamburg, DE
• Bernhard Brendel · Norderstedt, DE
• Heiner Daerr · Hamburg, DE
• ARTUR SOSSIN · Hamburg, DE
• Axel Thran · Hamburg, DE

Key dates

• Filing date: May 7, 2019
• Grant date: Sep 6, 2022
• Expiry date: May 7, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01T1/17
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A radiation detector (100) adapted for detecting leakage currents is disclosed and comprises a direct conversion material (101) for converting incident radiation, at least one first electrode (108) and a plurality of second electrodes (103) connected to surfaces of the direct conversion material (101) for collecting each generated charges upon application of an electric field, at least one current measurement device (201), and a plurality of signal processing chains (210, 220, 230). Each signal processing chain comprises a readout unit (215, 216, 217, 218, 219) for discriminating between energy values with respect to the incident radiation, and a switching element (214) for sending signals on a first signal path (2141) electrically connecting one of the plurality of second electrodes with the readout unit, or on a second signal path electrically connecting the one of the plurality of second electrodes with an input to one of the at least one current measurement devices. A plurality of switching elements is configured to send signals on the second signal path for measuring a leakage current received at a corresponding plurality of second electrodes of the detector in the absence of …