| Japanese |
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| Title | Single Photon Emission Computed Tomographyによる臓器体積測定の検討 - 輪郭決定法とその評価のためのファントム実験 - |
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| Subtitle | 原著 |
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| Authors | 中沢圭治*, 石井勝己*, 三屋公紀*, 山田伸明*, 鈴木順一*, 依田一重*, 松林隆* |
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| Authors(kana) | |
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| Organization | *北里大学医学部放射線科 |
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| Journal | 核医学 |
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| Volume | 21 |
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| Number | 1 |
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| Page | 1-6 |
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| Year/Month | 1984/1 |
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| Article | 原著 |
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| Publisher | 日本核医学会 |
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| Abstract | 「要旨」 近年SPECTの使用により体内臓器を横断断層像の積み重ねという形で三次元的に描出できるようになり, これを臓器の機能体積測定に応用することが考えられる. しかし, SPECT像はX線CTに比べ空間分解能が悪く臓器の辺縁にボケを生じ, 正しい輪郭を抽出する場合の問題点となっている. われわれはこの輪郭抽出法として微分法とcut off法を併用する方法を考案し, 基礎実験を行った. その結果, 肝・脾臓ファントム, 腎臓ファントムに対して3%以内の誤差範囲で体積を測定することができた. |
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| Practice | 臨床医学：一般 |
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| Keywords | single photon emission computed tomography, organ volume calculation. |
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| English |
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| Title | Measurement of Organ Volume by Single Photon Emission Computed Tomography : A Method of Contour Determination and Its Evaluation with Phantom Studies |
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| Subtitle | Original Articles |
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| Authors | Keiji NAKAZAWA, Katsumi ISHII, Koki MITSUYA, Nobuaki YAMADA, Junichi SUZUKI, Kazushige YODA, Takashi MATSUBAYASHI |
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| Authors(kana) | |
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| Organization | Department of Radiology, School of Medicine, Kitasato University |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 21 |
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| Number | 1 |
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| Page | 1-6 |
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| Year/Month | 1984/1 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] Using single photon emission computed tomography (SPECT) , we can obtain the three dimensional organ volume by summing up multitransverse-section images. By this technique, we may measure a functional organ volume. Up to date, however, we have no established method of delineating organ boundaries in the presently available SPECT system. In order to obtain accurate delineation of organ contours, we tried to use the combination of the differential and cut-off method. The accuracy of volume measurements by our method were evaluated in phantom studies. The correlation coefficient obtained between the true and calculated volume of six phantoms with different volume is 0.99 and the regression equation is y=0.99x+6, where y is the variable for calculated volumes and x is the variable for true volumes. The maximum difference between the true and calculated volumes is 2.4% for the kidney phantoms. |
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| Practice | Clinical medicine |
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| Keywords | single photon emission computed tomography, organ volume calculation. |
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