Development of a phoswich detector for a continuous blood sampling system

S. Yamamoto*, K. Tarutani, M. Suga, K. Minato, H. Watabe, H. Iida

*この研究の対応する著者

研究成果: Paper査読

抄録

We have developed a phoswich detector composed of a plastic scintillator and a BGO for a continuous blood sampling system. The beta particle (positron) from the tube is detected by the plastic scintillator and emits 511keV gamma photons. The BGO scintillator that is optically coupled to the plastic scintillator detects one of the gamma photons. Since the decay time of the plastic scintillator and the BGO are very different, it is possible to discriminate true (beta + gamma) events from background gamma events. First, the pulse height and pulse shape of plastic scintillator for beta particles and BGO for 511keV gamma photons were measured and compared to estimate the possibility of the proposed method. Then proposed phoswich detector was fabricated and tested. Absolute sensitivity for Ga-68 (maximum energy of 1.90MeV) and F-18 (maximum energy of 633keV) positrons were measured and compared with conventional beta detector in similar size. The absolute sensitivity of the developed detector was 0.15counts/Bq for Ga-68 positrons at the center of the detector that was approximately 5 times higher sensitivity than the conventional beta detector. The absolute sensitivity of the developed detector for F-18 positrons was 0.017counts/Bq while that of the conventional beta detector was zero. The count rate of the developed detector was linear up to 10kcps. The background count rate was small. These results indicate that the developed detector is useful not only for higher energy positrons such as O-15 but also lower energy positrons such as F-18 or C-11.

本文言語English
ページ14/28-14/31
出版ステータスPublished - 2000
外部発表はい
イベント2000 IEEE Nuclear Science Symposium Conference Record - Lyon, France
継続期間: 2000 10月 152000 10月 20

Conference

Conference2000 IEEE Nuclear Science Symposium Conference Record
国/地域France
CityLyon
Period00/10/1500/10/20

ASJC Scopus subject areas

  • 放射線
  • 核物理学および高エネルギー物理学
  • 放射線学、核医学およびイメージング

フィンガープリント

「Development of a phoswich detector for a continuous blood sampling system」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル