CN-116184476-B - PET detector and PET apparatus

Abstract

The application relates to a PET detector and PET equipment, wherein the PET detector comprises a photoelectric conversion array, the photoelectric conversion array comprises a plurality of photoelectric converters which are arranged in an array mode, a reading circuit component comprises an insulating substrate, a film electrode and a copper-clad layer, the film electrode is arranged on one side of the insulating substrate, the copper-clad layer is arranged on the other side of the insulating substrate, the reading circuit component is arranged on the photoelectric conversion array, the film electrode is in electrical contact with the photoelectric conversion array, current output ends are arranged at four corners of the film electrode, the copper-clad layer is provided with signal output ends, and when current of the photoelectric conversion array flows into the film electrode, time information is acquired through the signal output ends of the copper-clad layer. The PET detector can accurately acquire the position information and the time information of the PET signals.

Inventors

• Sang Ziru
• WANG XIAOHUI
• YANG YONGFENG
• NIU MING
• REN NING
• KUANG ZHONGHUA
• HU ZHANLI

Assignees

• 深圳先进技术研究院

Dates

Publication Date

20260505

Application Date

20211129

Claims (10)

1. 1. A PET detector, the PET detector comprising: the photoelectric conversion array comprises a plurality of photoelectric converters arranged in an array manner; The reading circuit assembly comprises an insulating substrate, a thin film electrode arranged on one side of the insulating substrate, and a copper-clad layer arranged on the other side of the insulating substrate; The reading circuit component is arranged on the photoelectric conversion array, and the thin film electrode is in electrical contact with the photoelectric conversion array; and when the current of the photoelectric conversion array flows into the thin film electrode, time information is acquired through the signal output ends of the copper-clad layer.
2. 2. The PET detector of claim 1, wherein a plurality of soldering points arranged in an array are provided on the thin film electrode, the soldering points correspond to the photoelectric converter, and the photoelectric converter is connected with the thin film electrode through the soldering points.
3. 3. The PET detector of claim 2, wherein the photoelectric converter is a silicon photomultiplier.
4. 4. The PET detector of claim 1, wherein the thin film electrode and the copper-clad layer are the same size and are disposed in correspondence.
5. 5. The PET detector of claim 4 wherein the signal output is centered on the copper-clad layer.
6. 6. The PET detector of claim 4 wherein the copper clad layer is comprised of at least one copper layer, the copper layer being square or honeycomb shaped.
7. 7. The PET detector of claim 1, wherein the insulating substrate is an aluminum oxide ceramic or an aluminum nitride ceramic.
8. 8. The PET detector of claim 1, wherein the thin film electrode and the copper-clad layer are formed on the insulating substrate by an evaporation or sputtering process.
9. 9. The PET detector of claim 1, wherein the readout circuit assembly further comprises a low noise amplifier and a high speed comparator, the signal output of the copper-clad layer being connected to the low noise amplifier, the low noise amplifier being connected to the high speed comparator.
10. 10. A PET apparatus comprising a plurality of PET detectors according to any one of claims 1 to 9.

Description

PET detector and PET apparatus Technical Field The present application relates generally to the field of electronic information technology. More particularly, the present application relates to a PET detector and a PET apparatus. Background Positron emission tomography (Positron Emission Tomography, PET) equipment is an advanced nuclear medicine imaging equipment, which mainly converts optical signals into electrical signals and performs recording processing on the electrical signals, wherein the main recorded physical quantities are time information and energy information of the optical signals. In order to read these two information, the current main reading method is single channel reading, resistor network reading and row-column reading. The individual channel readout method is the most intuitive one and in principle best retains the required time and energy information. However, the excessive number of output channels is a great challenge to engineering implementation and cost. The resistor network readout method can realize the number compression of readout channels, but after each individual SiPM pixel passes through a channel compression circuit, accurate time information is lost, and original time information cannot be reserved. The column-row readout method can realize channel compression, one-row or one-column readout, and the time information can be reserved to a certain extent compared with the resistance network readout method, but the time information is still lost to a large extent. Disclosure of Invention The application provides a PET detector and PET equipment, which are used for solving the problem that information detection in the existing PET equipment is easy to lose. In order to solve the technical problems, the application provides a PET detector which comprises a photoelectric conversion array, a readout circuit assembly and a time information acquisition device, wherein the photoelectric conversion array comprises a plurality of photoelectric converters which are arranged in an array mode, the readout circuit assembly comprises an insulating substrate, a film electrode arranged on one side of the insulating substrate and a copper-clad layer arranged on the other side of the insulating substrate, the readout circuit assembly is arranged on the photoelectric conversion array, the film electrode is in electrical contact with the photoelectric conversion array, the four corners of the film electrode are respectively provided with a current output end, the copper-clad layer is provided with a signal output end, and when current of the photoelectric conversion array flows into the film electrode, the time information is acquired through the signal output ends of the copper-clad layer. In one embodiment, a plurality of welding points are arranged on the thin film electrode in an array mode, the welding points correspond to the photoelectric converters, and the photoelectric converters are connected with the thin film electrode through the welding points. In one embodiment, the photoelectric converter is a silicon photomultiplier. In one embodiment, the thin film electrode and the copper-clad layer are the same size and are disposed correspondingly. In one embodiment, the signal output is located at a center of the copper-clad layer. In one embodiment, the copper-clad layer is composed of at least one complete copper layer, and the copper layer is square or honeycomb-shaped. In one embodiment, the insulating substrate is an alumina ceramic or an aluminum nitride ceramic. In one embodiment, the thin film electrode and the copper-clad layer are formed on the insulating substrate by an evaporation or sputtering process. In one embodiment, the readout circuit assembly further includes a low noise amplifier and a high speed comparator, and the signal output terminal of the copper-clad layer is connected to the low noise amplifier, and the low noise amplifier is connected to the high speed comparator. In order to solve the technical problems, the application provides a PET device, which comprises the PET detector. The PET detector comprises a photoelectric conversion array, a readout circuit assembly and a time information acquisition device, wherein the photoelectric conversion array comprises a plurality of photoelectric converters arranged in an array mode, the readout circuit assembly comprises an insulating substrate, a film electrode arranged on one side of the insulating substrate and a copper-clad layer arranged on the other side of the insulating substrate, the readout circuit assembly is arranged on the photoelectric conversion array, the film electrode is in electrical contact with the photoelectric conversion array, current output ends are arranged at four corners of the film electrode, the copper-clad layer is provided with signal output ends, and when current of the photoelectric conversion array flows into the film electrode, time information is acquired through the signal output