| Japanese |
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| Title | ガンマカメラによる血中放射能測定の検討 |
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| Subtitle | 技術報告 |
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| Authors | 藤岡弘良*, 村瀬研也***, 井上武**, 石丸良広**, 赤宗明久**, 棚田修二***, 池添潤平*** |
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| Authors(kana) | |
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| Organization | *松山市民病院放射線室, **松山市民病院放射線科, ***愛媛大学医学部放射線科 |
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| Journal | 核医学 |
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| Volume | 35 |
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| Number | 5 |
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| Page | 321-326 |
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| Year/Month | 1998/6 |
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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」血中放射能等の放射性同位元素(RI)の試料測定をガンマカメラを用いて可能かどうか検討した. 放射能濃度が10.3MBq/mlの123I水溶液を内径22.5mmの採血瓶に1ml入れ, その放射能の減衰を経過時間により計算して種々の放射能濃度を作成した. 作成した試料をガンマカメラで5分間 static 収集し, その画像のカウント値を求めて放射能濃度との直線性について検討した. コリメータをはずして64×64マトリックスで static 収集し, 収集した画像上に7×7pixel(21mm×21mm)の矩形の関心領域を設定してカウント値を求めた場合, 放射能濃度が0.032kBq/mlから279kBq/mlの範囲において, 良好な直線性が認められた. 本検討によりガンマカメラは, ウェル型シンチレーションカウンタの代用として血中放射能等のRI試料測定に使用可能であると考えられた. |
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| Practice | 臨床医学：一般 |
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| Keywords | Gamma camera, Well-type scintillation counter, Blood radioactivity, Quantitative measurement |
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| English |
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| Title | Investigation on Feasibility of Using a Gamma Camera for the Measurement of Blood Radioactivity |
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| Subtitle | Technical Report |
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| Authors | Hiroyoshi FUJIOKA*, Kenya MURASE**, Takeshi INOUE*, Yoshihiro ISHIMARU*, Akihisa AKAMUNE*, Shuji TANADA**, Junpei IKEZOE** |
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| Authors(kana) | |
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| Organization | *Department of Radiology, Matsuyama Shimin Hospital, **Department of Radiology, Ehime University Hospital |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 35 |
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| Number | 5 |
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| Page | 321-326 |
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| Year/Month | 1998/6 |
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| Article | Report |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | The present study was undertaken to determine whether gamma cameras can be used to measure radioactivity in samples, e.g. in blood. Aqueous 123I solution with a concentration of 10.3 MBq/ml was infused at a volume of one ml into a blood-sampling vial having an internal diameter of 22.5 mm. Various concentrations of radioactivity were generated by leaving the vial and taking radioactive decay into account. Static images were acquired for five minutes with a gamma camera using a 64×64 matrix to measure radioactivity counts, and the regions of interest with 7×7 pixels (21 mm×21 mm) were defined on the image. The results showed that there was a good linear correlation between the radioactivity counts measured with the gamma camera without collimator and those measured with the well-type scintillation counter in the range between 0.032 kBq/ml and 279 kBq/ml. It therefore appears that gamma cameras can be substituted for well-type scintillation counters in the measurement of radioactivities in samples. |
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| Practice | Clinical medicine |
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| Keywords | Gamma camera, Well-type scintillation counter, Blood radioactivity, Quantitative measurement |
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