| Japanese |
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| Title | 連続反転収集のファントムによる基礎的検討 |
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| Subtitle | 技術報告 |
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| Authors | 高橋康幸*, 松木弘量**, 望月輝一*** |
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| Organization | *愛媛県立中央病院放射線部, **愛媛県立中央病院放射線科, ***愛媛県立今治病院放射線科 |
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| Journal | 核医学 |
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| Volume | 33 |
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| Number | 12 |
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| Page | 1363-1369 |
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| Year/Month | 1996/12 |
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| Article | 報告 |
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| Publisher | 日本核医学会 |
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| Abstract | 「要旨」 Single Photon Emission Computed Tomography (SPECT)の収集法である連続反転収集において, その適正な回転数をファントム実験と臨床例により比較検討した. 一般的なSPECT検査時間を15分と考え, その時間内で回転数を1, 3, 6, 9, 12に変化させた. 円柱ファントムによる格子の描出性や収集方向ごとのデータのばらつき, 心筋ファントムによる均一性, 欠損部の描出性はいずれも回転数が少ないほど良好であった. 回転数と収集方向ごとのデータのばらつきは回帰式y = 0.0243x2 - 0.7843x + 98.136 r2 = 0.9802を示し, また従来の収集法であるステップモードを1.00の基準とした総カウントは, 回帰式y = -0.0034x2 + 0.0157 + 1.2394 r2 = 0.9943の相関であった. なお99mTc-1,2-bis[bis(2-ethoxyethyl)phosphino]ethane(Tetrofosmin)心筋シンチグラフィによる正常例の評価でも回転数が少ないほど良質の画像が得られた. 連続反転収集では体動の影響による誤因データを削除し補正することを考慮すれば, 回転数は3〜6程度の複数反転が望ましいと考えられた. |
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| Practice | 臨床医学：一般 |
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| Keywords | 99mTc-Tetrofosmin, Continuous repetitive data acquisition, Rotation times |
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| English |
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| Title | Basic Study of Continuous Repetitive Data Acquisition Using a Phantom |
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| Subtitle | Technical Reports |
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| Authors | Yasuyuki TAKAHASHI*, Hirokazu MATSUKI*, Terukazu MOCHIZUKI** |
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| Organization | *Department of Radiology, Ehime Prefectural Central Hospital, **Department of Radiology, Ehime Prefectural Imabari Hospital |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 33 |
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| Number | 12 |
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| Page | 1363-1369 |
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| Year/Month | 1996/12 |
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| Article | Report |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] We evaluated the appropriate rotation rate in the continuous reverse collection mode of single photon emission computed tomography (SPECT), in phantoms and in volunteers. Since a SPECT examination generally takes 15 minutes, the rotation rate was changed from 1, to 3, 6, 9 and 12/15 minutes. A lower rotation rate resulted in clearer visualization of the lattice and less variance of data in each collection direction in a columnar phantom, and higher image homogeneity and clearer visualization of the defective area in a myocardial phantom. There was a correlation represented by regression equation y = 0.0243x2 - 0.7843x + 98.136 r2 = 0.9802 between the rotation rate and variance of data in each collection direction. There was also a correlation represented by the regression equation y = -0.0034x2 + 0.0157 + 1.2394 r2 = 0.9943 between the rotation rate and the total count corrected with that obtained in the step mode (conventional collection). Better 99mTc-1,2-bis[bis(2-ethoxyethyl)phosphino]ethane (Tetrofosmin) myocardial scintigraphy images were obtained at a lower rotation rate in a normal volunteer. In conclusion, a rotation rate of 3-6/15 minutes may be appropriate in continuous reverse collection. |
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| Practice | Clinical medicine |
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| Keywords | 99mTc-Tetrofosmin, Continuous repetitive data acquisition, Rotation times |
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