Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Development of One-channel Gamma ray spectroscope for Automatic Radiopharmaceutical Synthesis System

방사성 의약품 자동합성장치용 단채널 감마선 분광기 보드의 설계 및 제작

  • Received : 2014.01.07
  • Accepted : 2014.04.01
  • Published : 2014.04.25
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Abstract

In this paper, the prototype of one-channel gamma-ray spectroscope for automatic radiopharmaceutical systhesis system was designed and characterized. The prototype employed CZT (CdZnTe) spear detector for gamma-ray detection and employed analog-type signal processing method. A radioactive sample Co-60 was used for measuring performance of the gamma-ray spectroscope and energy spectrum is gained with bandwidth of 1173keV. The analog board is made up of SF (shaping filter) and PHA (peak and hold amplifier) for shaping CZT output signal appropriately and ADC (analog to digital converter) and FPGA (field programmable gate array) for drawing gamma-ray spectrum by counting the digitalized gamma-ray signal data.

본 논문에서는 방사성 의약품의 자동합성장치에 사용되는 단채널 감마선 분광기를 보드 형태로 설계, 제작하고 그 특성을 측정 분석하였다. 감마선 검출을 위해 CZT (CdZnTe) spear 검출기를 이용하였고 아날로그 방식을 적용한 신호처리 보드의 형태로 감마선 분광기를 제작하였다. 측정을 위하여 방사성 물질인 Co-60을 시료로 사용하였으며, 최대 1173keV까지의 감마선 에너지 스펙트럼을 얻을 수 있었다. 아날로그 보드는 CZT spear 검출기에서 감마선을 검출하여 출력하는 신호를 적절히 변화시켜주기 위한 SF (shaping filter) 및 PHA (peak and hold amplifier)와 수치화된 감마선 신호 데이터를 계산하기 위한 ADC(analog to digital converter)와 FPGA (field programmable gate array)로 구성되었다.

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