Device for the detection of gamma rays with active partitions

Patent metadata

Field	Value
Publication number	US-11448780-B2
Application number	US-201917289453-A
Country	US
Kind code	B2
Filing date	Oct 30, 2019
Priority date	Oct 31, 2018
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

The invention relates to a device for the detection of gamma rays coming from a source without image truncation and without image overlapping, comprising, at least, two detection cells and each of said cells comprising a detection space adapted to receive the gamma rays that penetrate through an opening, wherein said detection space comprises one or more detection assemblies, with some of said assemblies being positioned such that they stand in the way of the gamma rays coming into the overlap volume thereof.

First claim

The invention claimed is:

1. A device for the detection of gamma rays coming from a source, comprising at least two contiguous detection cells, wherein each of said detection cells comprises:
a collimation element comprising an opening through which the gamma rays coming from the source can penetrate, defining a cone of incidence;
a detection space adapted to receive the gamma rays that penetrate through the opening, wherein said detection space comprises one or more gamma ray detection assemblies; and wherein the theoretical projections of the cones of incidence of the gamma rays in two adjacent cells have an overlap volume within the detection space; the device being characterized in that at least one of the detection assemblies is arranged such that it stands in the way of the gamma rays coming into the overlap volume.

2. The device according to claim 1 , wherein one or more detection assemblies comprise at least one gamma ray blocking surface.

3. The device according to claim 2 , wherein the blocking surface is arranged as a separating partition between the detection cells, wherein said partition is in contact on both sides with detection assemblies of adjacent cells.

4. The device according to claim 3 , wherein the separating partition and/or the detection assemblies are arranged in a perpendicular or oblique manner with respect to a plane defined by the collimation element.

5. The device according to claim 1 , wherein at least one of the detection cells comprises at least two detection assemblies arranged with their planes forming an angle with one another, such that the space subtended by said detection assemblies encompasses the entire cone of incidence of the gamma rays.

6. The device according to claim 1 , wherein one or more detection assemblies comprise one or more reflective elements for guiding the paths of the gamma rays.

7. The device according to claim 6 , wherein at least one of the reflective elements comprises a rough or polished, retro-reflective or diffuse specular reflector or a combination thereof.

8. The device according to claim 1 , wherein one or more detection assemblies comprise an optically painted surface.

9. The device according to claim 1 , wherein at least one of the detection assemblies comprises a scintillating material as a gamma radiation-sensitive material and at least one photodetector connected to electronic signal readout and processing means of said photodetector.

10. The device according to claim 9 , wherein the scintillating material comprises a pixelated solid, a monolithic solid, a liquid, gas or a combination thereof.

11. The device according to claim 9 , wherein each detection cell comprises different scintillating materials.

12. The device according to claim 1 , wherein the photodetector of at least one of the detection assemblies comprises photomultipliers, avalanche diodes, photodiodes, phototransistors, photo-ICs or a combination thereof.

13. The device according to claim 1 , wherein at least one of the detection assemblies comprises a solid-state detector and/or a Cherenkov detector.

14. A system for generating images by means of the detection of gamma rays characterized in that it comprises one or more devices according to claim 1 , with an electronic signal readout and processing means thereof being connected to a device for reconstructing images from the processing of said signals.

15. The system according to claim 14 , wherein said system is arranged on a mobile platform adapted to be oriented towards different regions of the source of gamma radiation.

Assignees

• Univ Valencia Politecnica
• Consejo Superior Investigacion

Inventors

• Ilisie Victor
• Benlloch Baviera Jose Maria
• Sanchez Martinez Filomeno

Classifications

• A61B6/4258

  for detecting non x-ray radiation, e.g. gamma radiation (A61B6/037 takes precedence) · CPC title

• A61B6/00

  Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment (instruments measuring radiation intensity for application in the field of nuclear medicine, e.g. in vivo counting, G01T1/161) · CPC title

• G01T1/1644 Primary

  using an array of optically separate scintillation elements permitting direct location of scintillations (G01T1/1645 takes precedence) · CPC title

• G01T1/249

  specially adapted for use in SPECT or PET (SPECT imaging G01T1/1642; PET imaging G01T1/2985; detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects G01V5/20) · CPC title

• G21K1/025

  using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation · CPC title