DSP based real-time position calculation circuit for beta camera

S. Yamamoto*, T. Matsuda, I. Kanno

*この研究の対応する著者

研究成果: Conference contribution

抄録

A digital signal processor(DSP) based position calculation circuit was developed and tested for beta camera. The previous position calculation circuit which employed flash analog to digital(A-D) converters for A-D conversion and ratio calculation occurred significant line artifacts in the image due to the differential non-linearity of the A-D converters. The new position calculation circuit uses four A-D converters for only A-D conversion of the analog signals from the position sensitive photomultiplier tube (PSPMT). The DSP reads the A-D signals and calculates the ratio of Xa / (Xa + Xb) and Ya / (Ya + Yb) in event by event basis. The DSP also magnifies the image to fit the useful field of view(FOV) and rejects the events out of the FOV. The line artifacts in the image was almost eliminated.

本文言語English
ホスト出版物のタイトルIEEE Nuclear Science Symposium and Medical Imaging Conference
出版社IEEE
ページ1509-1512
ページ数4
ISBN(印刷版)0780350227
出版ステータスPublished - 1999
外部発表はい
イベントProceedings of the 1998 IEEE Nuclear Science Symposium Conference Record - Toronto, Que, Can
継続期間: 1998 11月 81998 11月 14

出版物シリーズ

名前IEEE Nuclear Science Symposium and Medical Imaging Conference
3

Other

OtherProceedings of the 1998 IEEE Nuclear Science Symposium Conference Record
CityToronto, Que, Can
Period98/11/898/11/14

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

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