# US 2020/0400593 A1 · Camera compton multi-capture et procede d'imagerie

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- Number: US 2020/0400593 A1
- Document ID: US20200400593A1
- Status: Published application
- Kind: A1
- Application number: 16/446,471
- Filed: 2019-06-19
- Published: 2020-12-24
- Earliest claimed: 2019-06-19
- Assignees: Damavan Imaging; A.N.D.R.A.
- Applicants: Damavan Imaging; A.N.D.R.A.
- Inventors: Alain ILTIS
- Web page: https://patentgrep.com/patent/US20200400593A1

## CPC

- G01N 23/20066: Measuring inelastic scatter of gamma rays, e.g. Compton effect
- G01T 1/1603: {with a combination of at least two different types of detectors}
- G01T 1/29: Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
- G01N 2223/401: image processing
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- G01T: MEASUREMENT OF NUCLEAR OR X-RADIATION (radiation analysis of materials, mass spectrometry G01N23/00; tubes for determining the presence, intensity, density or energy of radiation or particles H01J47/00)

## Abstract

The present invention concerns a device, system and method of use of a multi-capture Compton camera, characterised by the use of at least two capture centres having separate positions.

## Claims

### Claim 1

A multi-capture Compton camera, comprising at least two capture centres having separate positions.

### Claim 2 (depends on 1)

The multi-capture Compton camera according to claim 1, wherein the separate positions are separated by a distance less than or equal to twice the angular resolution of the Compton camera capture centre.

### Claim 3 (depends on 2)

The multi-capture Compton camera according to claim 2, wherein the separate positions are separated by a distance less than but close to twice the angular resolution of the Compton camera capture centre.

### Claim 4 (depends on 2)

The multi-capture Compton camera according claim 2, wherein the separate positions are disposed along an arc centred on the position of the gamma-ray source.

### Claim 5

A multi-capture Compton camera consisting of two adjacent detection assemblies observing the same field of view, wherein the two detection assemblies are separated by an angular distance greater than 1° at the maximum range of the camera in order to make it possible to observe displacement of a point source at the maximum range between two images taken simultaneously.

### Claim 6 (depends on 1)

The multi-capture Compton camera according to claim 1, wherein the same effect is produced by a precisely known relative movement of the camera between two shots, the position of the optical axis of the camera also being known.

### Claim 7

A method of estimating the distance from a radioactive source by triangulation of gamma rays utilizing a camera to estimate the distance from a radioactive source by triangulation of gamma rays.

### Claim 8 (depends on 6)

The method according to claim 6 further comprising eliminating artefacts, preserving only the points which are preserved between the two images (coherent distance).

### Claim 9 (depends on 6)

The method according to claim 6 further comprising utilizing the camera to detect and produce an image of very weak sources of <0.1 microrad/h with certainty.

### Claim 10 (depends on 6)

The method according to claim 6 further comprising reconstructing utilizing a multi-capture camera which consists of considering, for the reconstruction, only the intersections of cones arising from camera C1 with those arising from camera C2.