Practical compensation method of downscattered component due to high energy photon in 123I imaging

Nobutoku Motomura, Takashi Ichihara, Takuzo Takayama, Shigeru Aoki, Hitoshi Kubo, Kan Takeda

研究成果: Article査読

12 被引用数 (Scopus)

抄録

We looked into the problem that the quantitative values of 123I data vary according to collimator type. First, we made the assumption that the quantitative values of 123I data are degraded by the scattered photons from the 529 keV component which contaminate the 159 keV imaging data. Then, the 123I Dual Window (IDW) method was proposed to improve the quantitative values of the 123I data. The IDW method uses the energy window on the high-energy side to estimate the amount of scattered 529 keV photons which contaminate the 159 keV data. Since only a dual-energy window acquisition and a simple image processing are needed, the IDW method can be performed in most conventional gamma camera systems. In the torso phantom studies, the IDW method reduced the error in the semi-quantitative value 'heart/mediastinum (H/M) ratio' n 123I-MIBG myocardial scintigraphy from 22% to 1%. The results of the phantom studies indicate that the IDW method can improve the quantitative values of 123I data.

本文言語English
ページ(範囲)997-1005
ページ数9
ジャーナルKakuigaku
36
9
出版ステータスPublished - 1999

All Science Journal Classification (ASJC) codes

  • 放射線学、核医学およびイメージング

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