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Practical performance evaluation of a commercial small animal SPECT system with a single-pinhole or 5-hole collimator
https://repo.qst.go.jp/records/69916
https://repo.qst.go.jp/records/699163f1ec97e-7aa5-4040-accb-c19ce746be46
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2009-10-26 | |||||
| タイトル | ||||||
| タイトル | Practical performance evaluation of a commercial small animal SPECT system with a single-pinhole or 5-hole collimator | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Inubushi, Masayuki
× Inubushi, Masayuki× Shidahara, Miho× Murai, Chika× Tsuji, Atsushi× Koizumi, Mitsuru× Kanno, Iwao× Saga, Tsuneo× 犬伏 正幸× 志田原 美保× 村井 知佳× 辻 厚至× 小泉 満× 菅野 巖× 佐賀 恒夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Purpose: From the viewpoint of practical use, we evaluated the basic performance of a commercial high-resolution small animal SPECT system FX(SPECT/CT) (Gamma Medica-Ideas, CA) In our system, a single-pinhole or 5-hole collimator, which consists of 1mm diameter apertures, can be mounted on a 12 x 12cm NaI(Tl) scintillation detector. Methods: For evaluation of spatial resolution, sensitivity and effective FOV, a line source, a point source and a cylindrical phantom (1.6cm diameter) filled with 99mTcO4- solution were scanned with various rotation of radius (ROR) from 2.5cm to 8.0cm. The sensitivity, E [cps/MBq], using a point source located at the center of rotation was calculated by the division of measured total counts in the projection and its known activity. For resolution FWHM was calculated by fitting the line source image with Gaussian function. The axial length of cylindrical phantom, which preserve less than 10% bias compared with averaged counts in 1cm diam. circular region of interest (ROI) at the central slice, was regarded as effective FOV. Results: The relationship between sensitivity (y) and ROR (x) was y = 175.9x^(-1.97), y = 1641x^(-2.04) for single- and 5-hole collimator, respectively. The relationship between resolution (y) and ROR (x) was y = 0.13x+0.49, y = 0.19x+0.29, respectively. Effective FOV (y) of single-hole collimator (y = 1.2x-1.3) resulted in quite different from that of 5-hole collimator (y = 0.42x-0.45) due to the amount of overlapping in projection data. Conclusions: We evaluated the basic performance of the pinhole SPECT system, which did not depend only on detector system but also on ROR and the type of collimator. For its practical use, therefore, physical setting such as ROR and collimator should be carefully optimized for research purposes. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Annual Congress of the European Association of Nuclear Medicine 2009 | |||||
| 発表年月日 | ||||||
| 日付 | 2009-10-14 | |||||
| 日付タイプ | Issued | |||||
