IP Library Granted Patent US 8,405,038
Granted Patent B2
US 8,405,038 · App. 12/649,987 · Granted Mar 26, 2013

Systems and methods for providing a shared charge in pixelated image detectors

Inventors: Jean-Paul Bouhnik (Zichron Yaacov, IL); James William Hugg (Glenville, NY); Ira Blevis (Zichron Yaakov, IL); Yaron Hefetz (Kibbutz Alonim, IL)
Assignee: General Electric Company
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Quick Facts
Patent No.
US 8,405,038
App. No.
12/649,987
Granted
Mar 26, 2013
Kind
B2
Abstract

Systems and methods for providing a shared charge in pixelated image detectors are provided. One method includes providing a plurality of pixels for a pixelated solid state photon detector in a configuration such that a charge distribution is detected by at least two pixels and obtaining charge information from the at least two pixels. The method further includes determining a position of an interaction of the charge distribution with the plurality of pixels based on the obtained charge information.

Claims (23)

1. A method for controlling a charge distribution of a pixelated solid state photon detector, the method comprising:

providing a plurality of pixels for a pixelated solid state photon detector in a configuration such that a charge distribution is detected by at least two pixels by at least one of shaping or spacing pixelated elements defining the pixels to share a charge for the at least two pixels;

configuring each of the plurality of pixels in a stretched configuration having an overlapping region between adjacent pixels;

obtaining charge sharing information from the at least two pixels; and

determining a position of an interaction of the charge distribution with the plurality of pixels based on the obtained charge sharing information.

2. A method in accordance with claim 1 wherein the charge distribution is defined by a electron charge cloud and further comprising configuring the plurality of pixels to have a size smaller than the electron charge cloud.

3. A method in accordance with claim 1 wherein determining a position comprises using a centroid calculation to determine the position, wherein the centroid calculation uses charge information from a primary pixel and at least one adjacent pixel.

4. A method in accordance with claim 1 wherein the plurality of pixels are divided into rows and columns and further comprising using row and column summing to obtain the charge sharing information.

5. A method in accordance with claim 1 further comprising determining an energy of a detected photon by summing an energy output of a plurality of channels associated with the plurality of pixels.

6. A method in accordance with claim 1 wherein providing a plurality of pixels comprises providing a plurality of anode pixels and a plurality of cathode pixels.

7. A method in accordance with claim 1 further comprising determining a depth of interaction using a time based on a time of flight difference between anode and cathode signals of the pixelated solid state photon detector.

8. A method in accordance with claim 1 further comprising determining a correction factor for the plurality of pixels based on the determined position.

9. A method in accordance with claim 1 further comprising configuring each of the plurality of pixels into sub-pixels.

10. A method in accordance with claim 1 further comprising interconnecting the plurality of pixels such that alternating pixels in each of a plurality of rows and columns of a pixel array are connected.

11. A method in accordance with claim 1 wherein the overlapping regions comprise a saw-toothed configuration.

12. A method in accordance with claim 1 further comprising positioning the plurality of pixels such that the charge distribution is detected by the at least two pixels.

13. A method for controlling a charge distribution of a pixelated solid state photon detector, the method comprising:

providing a plurality of pixels for a pixelated solid state photon detector in a configuration such that a charge distribution is detected by at least two pixels by at least one of shaping or spacing pixelated elements defining the pixels to share a charge for the at least two pixels;

providing a resistive layer adjacent the plurality of pixels;

obtaining charge sharing information from the at least two pixels; and

determining a position of an interaction of the charge distribution with the plurality of pixels based on the obtained charge sharing information.

14. A method in accordance with claim 1 further comprising providing a steering grid configured to focus a charge sharing of the charge distribution.

15. A method in accordance with claim 1 further comprising providing a two-layer pixelated solid state photon detector having a plurality of pixelated anodes.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 30, 2013
From: GENERAL ELECTRIC COMPANY
To: GE MEDICAL SYSTEMS ISRAEL, LTD
Reel/Frame 031510/0018 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 13, 2010
From: BOUHNIK, JEAN-PAUL; BLEVIS, IRA; HEFETZ, YARON
To: GENERAL ELECTRIC COMPANY
Reel/Frame 024383/0767 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 13, 2010
From: HUGG, JAMES WILLIAM
To: GENERAL ELECTRIC COMPANY
Reel/Frame 024383/0780 →
Continuity (1)
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