Earticle

초록

영어

Background: For positron emission tomography (PET) application, cadmium zinc telluride (CZT) has been investigated by several institutes to replace detectors from a conventional system using photomultipliers or Silicon-photomultipliers (SiPMs). The spatial and energy resolution in using CZT can be superior to current scintillator-based state-of-the-art PET detectors. CZT has been under development for several years at the Korea Atomic Energy Research Institute (KAERI) to provide a high performance gamma ray detection, which needs a single crystallinity, a good uniformity, a high stopping power, and a wide band gap. Materials and Methods: Before applying our own grown CZT detectors in the prototype PET system, we investigated preliminary research with a developed discrete type data acquisition (DAQ) system for coincident events at 128 anode pixels and two common cathodes of two CZT detectors from Redlen. Each detector has a 19.4×19.4×6 mm3 volume size with a 2.2 mm anode pixel pitch. Discrete amplifiers consist of a preamplifier with a gain of 8 mV·fC-1 and noise of 55 equivalent noise charge (ENC), a CR-RC4 shaping amplifier with a 5 μs peak time, and an analog-to-digital converter (ADC) driver. The DAQ system has 65 mega-sample per second flash ADC, a self and external trigger, and a USB 3.0 interface. Results and Discussion: Characteristics such as the current-to-voltage curve, energy resolution, and electron mobility life-time products for CZT detectors are investigated. In addition, preliminary results of gamma ray imaging using 511 keV of a 22Na gamma ray source were obtained. Conclusion: In this study, the DAQ system with a CZT radiation sensor was successfully developed and a PET image was acquired by two sets of the developed DAQ system.

목차

ABSTRACT
 1. INTRODUCTION2
 2. MATERIALS AND METHODS
  2.1 CZT radiation sensor module
  2.2 Development of data acquisition (DAQ) system
  2.3 PET image acquisition
 3. Results and Discussion
  3.1 Characteristics of CZT radiation sensor
  3.2 Performance of the developed amplifier modules
  3.3 PET image acquisition
 4. CONCLUSION
 REFERENCES

키워드

저자

• Woo Jin Jo [ Advanced Radiation Detection Instrument & Sensor Lab., Korea Atomic Energy Research Institute, Jeongeup, Republic of Korea ]
• Manhee Jeong [ Advanced Radiation Detection Instrument & Sensor Lab., Korea Atomic Energy Research Institute, Jeongeup, Republic of Korea ]
• Han Soo Kim [ Advanced Radiation Detection Instrument & Sensor Lab., Korea Atomic Energy Research Institute, Jeongeup, Republic of Korea ]
• Sang Yeol Kim [ Notice Co., Ltd., Anyang, Republic of Korea ]
• Jang Ho Ha [ Advanced Radiation Detection Instrument & Sensor Lab., Korea Atomic Energy Research Institute, Jeongeup, Republic of Korea ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  방사선방어학회지 [Journal of Radiation Protection and Research]

• 간기

  계간

• pISSN

  2508-1888

• 수록기간

  1976~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 559 DDC 629