連続回転収集ＳＰＥＣＴにおける収集ステップ角度と空間分解能の基礎的検討

DOI Web Site 被引用文献2件 参考文献15件

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タイトル別名
  • Basic Evaluation of Sampling Step Angle and Spatial Resolution in Continuous Rotating Acquisition with SPECT
  • 臨床技術 連続回転収集SPECTにおける収集ステップ角度と空間分解能の基礎的検討
  • リンショウ ギジュツ レンゾク カイテン シュウシュウ SPECT ニ オケル シュウシュウ ステップ カクド ト クウカン ブンカイノウ ノ キソテキ ケントウ

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In the data sampling in single photon emission computed tomography (SPECT), the continuous rotating acquisition method has high clinical utility. There have been various reports about the optimum sampling step angle for continuous rotating acquisition. Objective evaluation was performed visually and by measuring spatial resolution with a column phantom to find the optimum sampling step angle for continuous rotating acquisition. In locations far from the rotation center, a large sampling step angle produced artificial images with tangential elongation. The spatial resolution was 11.58 ± 0.19 mm full width half maximum (FWHM) as measured at a sampling step angle of 3 degrees and at 10 cm away from the rotation center. Increasing the sampling step angle to more than 3 degrees resulted in an increase of FWHM in the tangential direction. The optimum sampling step angle for continuous rotating acquisition in SPECT needs to be below that calculated from the sampling theorem.

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