Patent · US Active

Digital pulse processing for multi-spectral photon counting readout circuits

US8338791B2 · kind B2 · utility

9Cited by

8References

29Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Roland Proksa · Hamburg, DE
Jens-Peter Schlomka · Hamburg, DE
Ewald Roessl · Ellerau, DE
Tuvia Liran · Rekhasim, IL
Aviv Marks · Raanana, IL

Key dates

Filing date	May 23, 2008
Grant date	Dec 25, 2012
Priority date	—
Expiry date	Apr 7, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04N25/773
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An apparatus includes a local minimum identifier (408) that identifies a local minimum between overlapping pulses in a signal, wherein the pulses have amplitudes that are indicative of the energy of successively detected photons from a multi-energetic radiation beam by a radiation sensitive detector, and a pulse pile-up error corrector (232) that corrects, based on the local minimum, for a pulse pile-up energy-discrimination error when energy-discriminating the pulses using at least two thresholds corresponding to different energy levels. This technique may reduce spectral error when counting photons at a high count rate.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.