Device for the Detection of Gamma Rays with Active Partitions
AssigneesUniversitat Politècnica de València, Consejo Superior De Investigaciones Cientificas (Csic)
InventorsVictor Ilisie, Jose Maria BENLLOCH BAVIERA, Filomeno SANCHEZ MARTINEZ
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Abstract
The invention relates to a device for the detection of gamma rays (1) coming from a source (2) without image truncation and without image overlapping, comprising, at least, two detection cells (3) and each of said cells comprising a detection space (7) adapted to receive the gamma rays (1) that penetrate through an opening (5), wherein said detection space (7) comprises one or more detection assemblies (8, 8′), with some of said assemblies (8′) being positioned such that they stand in the way of the gamma rays (1) coming into the overlap volume (11) thereof.
Claims15
A device for the detection of gamma rays (1) coming from a source (2), comprising at least two contiguous detection cells (3), wherein each of said detection cells (3) comprises:
- a collimation element (4) comprising an opening (5) through which the gamma rays (1) coming from the source (2) can penetrate, defining a cone (6) of incidence;
- a detection space (7) adapted to receive the gamma rays (1) that penetrate through the opening (5), wherein said detection space (7) comprises one or more gamma ray detection assemblies (8, 8′);
- and wherein the theoretical projections of the cones (6) of incidence of the gamma rays (1) in two adjacent cells (3) have an overlap volume (11) within the detection space (7);
- the device being characterized in that at least one of the detection assemblies (8′) is arranged such that it stands in the way of the gamma rays (1) coming into the overlap volume (11).
The device according to the preceding claim, wherein one or more detection assemblies (8′) comprise at least one gamma ray blocking surface (12).
The device according to the preceding claim, wherein the blocking surface (12) is arranged as a separating partition between the detection cells (3), wherein said partition is in contact on both sides with detection assemblies (8′) of adjacent cells (3).
The device according to the preceding claim, wherein the separating partition and/or the detection assemblies (8, 8′) are arranged in a perpendicular or oblique manner with respect to a plane defined by the collimation element (4).
The device according to any of the preceding claims, wherein one or more detection assemblies (8, 8′) comprise one or more reflective elements (13) for guiding the paths of the gamma rays (1).
The device according to the preceding claim, wherein at least one of the reflective elements (13) comprises a rough or polished, retro-reflective or diffuse specular reflector or a combination thereof.
The device according to any of the preceding claims, wherein one or more detection assemblies (8, 8′) comprise an optically painted surface.
The device according to any of the preceding claims, wherein at least one of the detection assemblies (8, 8′) comprises a scintillating material as a gamma radiation-sensitive material (9) and at least one photodetector (10) connected to electronic signal readout and processing means of said photodetector.
The device according to the preceding claim, wherein the scintillating material comprises a pixelated solid, a monolithic solid, a liquid, gas or a combination thereof.
The device according to any of the preceding claims, wherein the photodetector (10) of at least one of the detection assemblies (8, 8′) comprises photomultipliers, avalanche diodes, photodiodes, phototransistors, photo-ICs or a combination thereof.
The device according to any of the preceding claims, wherein at least one of the detection assemblies (8, 8′) comprises a solid-state detector and/or a Cherenkov detector.
A system for generating images by means of the detection of gamma rays (1), such as in SPECT, characterized in that it comprises one or more devices according to any of the preceding claims, with the electronic signal readout and processing means thereof being connected to a device for reconstructing images from the processing of said signals.
The system according to the preceding claim, wherein said system is arranged on a mobile platform adapted to be oriented towards different regions of the source of gamma radiation.
Dependencies are inferred from the claim text.