X-ray detector arrangement

Patent metadata

Field	Value
Publication number	US-9841514-B2
Application number	US-201615241655-A
Country	US
Kind code	B2
Filing date	Aug 19, 2016
Priority date	Sep 24, 2015
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

The proposed technology relates to an x-ray detector arrangement having x-ray detector sub-modules arranged in two or more layers, where the separation between adjacent sub-modules in a lower layer is smaller than the corresponding separation between sub-modules in an upper layer.

First claim

The invention claimed is:

1. An x-ray detector arrangement having an x-ray detector array comprising multiple detectors, each detector being an x-ray detector sub-module comprising plural detector elements, wherein the x-ray detector x-ray detector sub-modules are arranged in two or more layers,
wherein the separation between adjacent x-ray detector sub-modules in a lower layer is smaller than the corresponding separation between adjacent x-ray detector sub-modules in an upper layer, the upper layer being arranged to be closer to an x-ray source than the lower layer, wherein the upper layer has multiple x-ray detector sub-modules and the lower layer has multiple x-ray detector sub-modules, and the lower layer has a larger number of x-ray detector sub-modules than the upper layer and the lower layer thereby has an increased fill factor of x-ray detector sub-modules to increase detection efficiency, and
wherein the x-ray detector sub-modules in the lower layer and the x-ray detector sub-modules in the upper layer have the same functionality and detect radiation in a same energy range.

2. The x-ray detector arrangement of claim 1 , wherein the detector sub-modules are detector modules oriented edge-on to the incoming x-rays.

3. The x-ray detector arrangement of claim 1 , wherein the x-ray detector arrangement is based on Silicon as detector material.

4. An x-ray imaging system comprising an x-ray detector arrangement according to claim 1 .

5. The x-ray detector arrangement of claim 2 , wherein the x-ray detector arrangement is based on Silicon as detector material.

6. An x-ray detector arrangement comprising:
an x-ray detector array comprising plural detectors arranged with respect to a x-ray source, each detector being an x-ray detector sub-module comprising plural detector elements,
wherein the x-ray detector sub-modules are arranged in an upper layer of N adjacent detector sub-modules and a lower layer of M adjacent detector sub-modules, M>N, the upper layer being arranged closer to the x-ray source than the lower layer, and
wherein a separation between the M adjacent detector sub-modules in the lower layer is smaller than a corresponding separation between the N adjacent sub-modules in the upper layer, the lower layer thereby having an increased fill factor of the x-ray detector sub-modules that increases detection efficiency by having impinging x-rays encounter a double detector thickness which reduces a risk for an x-ray passing the upper and lower layers undetected, and
wherein the x-ray detector sub-modules in the lower layer and the x-ray detector sub-modules in the upper layer have the same functionality and detect radiation in a same energy range.

Assignees

• Prismatic Sensors Ab

Inventors

• Danielsson Mats
• Karlsson Staffan

Classifications

• A61B6/4208

  characterised by using a particular type of detector · CPC title

• G01T1/242 Primary

  Stacked detectors, e.g. for depth information (constructional or manufacturing details H10W90/00) · CPC title

• A61B6/4266

  characterised by using a plurality of detector units (A61B6/4014 takes precedence) · CPC title

• G01T1/2985

  In depth localisation, e.g. using positron emitters; Tomographic imaging (longitudinal and transverse section imaging; apparatus for radiation diagnosis sequentially in different planes, steroscopic radiation diagnosis); (using external radiation sources A61B6/02) · CPC title

• A61B6/032

  Transmission computed tomography [CT] · CPC title