抄録
The aim of the study is to develop an ultra high-resolution pinhole SPECT system and analyze the performance by simulations. The pinhole SPECT was conducted with a Toshiba GCA-7200A gamma camera. The diameter of the pinhole was 1 mm. Data were acquired with a 128×128 matrix, and the distance from the center of rotation (COR) to the pinhole was 20 mm [case 1] or 28 mm [case 2J. The data were collected at 4 degree increments over 360 degrees. The Feldkamp method was used for image reconstruction. Before the image reconstruction, we corrected the COR of the pinhole collimator. The imaging voxel was 0.27×0.27×0.27 mm3 [case 1] or 0.4×0.4×.4 mm3 [case 2J. From the experiments with a resolution phantom the spatial resolution (FWHM) was 1.1 mm [case 1] or 1.3 mm [case 2J. The pinhole SPECT was also examined for in vivo imaging for studies of the heart in mice which were injected with Tc-99m-Tetrofosmin intravenously. In the reconstructed image the heart muscle of the mouse was clearly visualized. We also investigated the spatial resolution of the reconstructed image by means of simulations.
本文言語 | 英語 |
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ページ(範囲) | 3122-3126 |
ページ数 | 5 |
ジャーナル | IEEE Transactions on Nuclear Science |
巻 | 45 |
号 | 6 |
DOI | |
出版ステータス | 出版済み - 1998 |
All Science Journal Classification (ASJC) codes
- 核物理学および高エネルギー物理学
- 原子力エネルギーおよび原子力工学
- 電子工学および電気工学