Multifunctional radiation detector

Patent metadata

Field	Value
Publication number	US-11112509-B2
Application number	US-201716302689-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	May 26, 2016
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

A multi-functional and multi-modality radiation detector (10) is provided. The radiation detector (10) comprises at least two detector units (12a, 12b) having photosensitive pixels (14) and at least one scintillation device (20) optically coupled to the photosensitive pixels (14). The detector units (12a, 12b) are arranged next to each other on a substrate foil (24). Therein, the scintillation devices (20) of the detector units (12a, 12b) are spaced apart from each other, such that the radiation detector (10) is bendable. This allows the radiation detector (10) to be used in many different geometrical configurations.

First claim

The invention claimed is:

1. A radiation detector, comprising:
a plurality of detectors, each detector comprising a plurality of photosensitive pixels and at least one scintillation device optically coupled to the plurality of photosensitive pixels;
a substrate foil for carrying the detectors; and
a switch arranged between two detectors of the plurality of detectors,
wherein the detectors are arranged in juxtaposition on the substrate foil;
wherein at least two directly adjoining scintillation devices of at least two directly adjoining detectors are spaced apart from each other, such that the radiation detector is bendable along at least a part of a bending region of the substrate foil,
wherein the bending region is arranged between the at least two directly adjoining scintillation devices;
wherein each detector comprises at least one of a separate addressing circuit for addressing the respective detector and a separate signal read-out circuit for reading-out signals from the respective detector; and
wherein the switch is configured to electrically interconnect and decouple the two detectors.

2. The radiation detector according to claim 1 , wherein the radiation detector is bendable with a bending angle enclosed by the at least two directly adjoining detectors; wherein the bending angle ranges from 0° to 360°.

3. The radiation detector according to claim 1 , wherein the substrate foil comprises polymer material.

4. The radiation detector according to claim 1 , wherein the plurality of photosensitive pixels comprises an array of photosensitive pixels; wherein each of the photosensitive pixels comprises at least one Thin-Film-Transistor element.

5. The radiation detector according to claim 1 , wherein at least one of the plurality of detectors has a curved shape.

6. The radiation detector according to claim 1 , wherein each separate addressing circuit and/or each separate signal read-out circuit is arranged on a separate electronics carrying region of the substrate foil.

7. The radiation detector according to claim 1 , wherein a first detector of the plurality of detectors is configured for detecting radiation in a first energy range; and wherein a second detector of the plurality of detectors is configured for detecting radiation in a second energy range, the second energy range being at least partly different from the first energy range.

8. The radiation detector according to claim 1 , wherein one detector of the plurality of detectors is an X-ray detector configured for detecting X-rays and arranged in a center region of the substrate foil; and wherein at least two detectors of the plurality of detectors are γ-ray detectors arranged on two opposite sides of the X-ray detector.

9. The radiation detector according to claim 1 , wherein the at least one scintillation device of each detector of the plurality of detectors comprises a scintillation layer arranged on top of at least a part of the plurality of photosensitive pixels; and/or wherein an edge of the scintillation device is tapered.

10. The radiation detector according to claim 1 , wherein each detector is flat.

11. The radiation detector according to claim 1 , wherein each detector is bent only at the bending region.

12. The radiation detector according to claim 1 , wherein both the addressing circuit and the read-out circuit are provided on one side of the substrate foil.

13. The radiation detector according to claim 12 , wherein both the addressing circuit and the read-out circuit are provided as an electronic TFT backplane circuit.

14. The radiation detector according to claim 1 , further comprising at least one light shield arranged on the substrate foil.

15. The radiation detector according to claim 1 , wherein the substrate foil is arranged in a Z-like shape in at least one of the bending regions.

16. The radiation detector according to claim 1 , wherein each neighboring detector of the plurality of detectors is brought closely together by folding the substrate foil at each bending region.

17. A method for producing a radiation detector, the method comprising:
providing a substrate foil and a plurality of detectors, each detector comprising a plurality of photosensitive pixels and at least one scintillation device optically coupled to the plurality of photosensitive pixels;
arranging the plurality of detectors on the substrate foil in juxtaposition with respect to each other, such that at least two directly adjoining scintillation devices of at least two directly adjoining detectors are spaced apart from each other by a gap, and such that the radiation detector is bendable along at least a part of the gap; and
arranging a switch between two detectors of the plurality of detectors,
wherein each detector comprises at least one of a separate addressing circuit for addressing the respective detector and a separate signal read-out circuit for reading-out signals from the respective detector; and
the switch is configured to electrically interconnect and decouple the two detectors.

Assignees

• Koninklijke Philips Nv

Inventors

• Jacobs Johannes Wilhelmus Maria

Classifications

• G01T1/20186

  Position of the photodiode with respect to the incoming radiation, e.g. in the front of, below or sideways the scintillator · CPC title

• G01T1/20188 Primary

  Auxiliary details, e.g. casings or cooling · CPC title

• G01T1/20185

  Coupling means between the photodiode and the scintillator, e.g. optical couplings using adhesives with wavelength-shifting fibres · CPC title

• G01T1/2928

  using solid state detectors · CPC title

• G01T1/247

  Detector read-out circuitry (for processing gain or off-set correction H04N) · CPC title