| Japanese |
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| Title | 心ファントムおよび数学的モデルによる因子分析法の検討 |
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| Subtitle | 《原著》 |
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| Authors | 中嶋憲一*, 山田正人**, 松平正道**, 分校久志*, 利波紀久*, 久田欣一*, 佐藤友彦***, 細羽実***, 和迩秀信*** |
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| Authors(kana) | |
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| Organization | *金沢大学医学部核医学科, **アイソトープ部, ***島津製作所医用機器事業部技術部 |
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| Journal | 核医学 |
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| Volume | 23 |
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| Number | 10 |
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| Page | 1423-1434 |
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| Year/Month | 1986/10 |
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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」: 動態機能の因子分析法について心ファントムおよび数学的モデルを用いて検討を行った. 作製したモデルは, 1) 矩形の数学的モデル, 2) 同形ファントムを時相を変えて数学的に重ねたモデル, 3) 2つの異形ファントムを重ねたモデル, 4) asynergyを有するファントムである. 因子の重なりについて検討したところ, 異形ファントムでは2つの因子の重なりを良く分離できた. しかし求められた機能成分の時間放射能曲線の定量性は, 因子の重なりの程度, 抽出する因子数に影響されることが判った. 因子数は予想される因子数以上に設定しても抽出可能であるが, その生理的あるいは理論的意味づけが重要であり, 無意味と考えられる因子については除外する必要がある. 因子分析は異なる因子の重なりを良く分離し, 異常の定性的なパターン認識法としては有用であるが, 定量化に際しては注意を要する. |
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| Practice | 臨床医学：一般 |
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| Keywords | Factor analysis, Dynamic study, Gated blood-pool study, Phantom study. |
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| English |
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| Title | Evaluation of Factor Analysis Using Cardiac Phantoms and Mathematical Models |
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| Subtitle | Original Articles |
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| Authors | Kenichi NAKAJIMA*, Masato YAMADA**, Masamichi MATSUDAIRA**, Hisashi BUNKO*, Norihisa TONAMI*, Kinichi HISADA*, Tomohiko SATO***, Minoru HOSOBA***, Hidenobu WANI*** |
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| Authors(kana) | |
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| Organization | *The Department of Nuclear Medicine, **The Division of Radioisotope Service,Kanazawa University Hospital, ***Medical Systems Division, Shimadzu Corporation |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 23 |
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| Number | 10 |
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| Page | 1423-1434 |
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| Year/Month | 1986/10 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] : Factor analysis for dynamic study (FADS) was evaluated using cardiac phantoms and mathematical models. Generated models were 1) rectangular mathematical models, 2) two mathematically superposed phantoms of the same shape with different contraction phase, 3) two superposed phantoms of different shapes, and 4) two phantoms with simulated asynergy. Two superposed phantoms were well separated by the FADS. The time-activity curve (TAC) extracted by the FADS had the shape characterizing its theoretical component. The quantitation by the TAC was affected by the degree of overlap and the estimated number of factors. The physiologic meaning of the factor was important in FADS, and if some extracted factor was considered to be meaningless, it should be excluded. The FADS separated the superposed factors well and was useful as a qualitative pattern-recognition method ; however, we must be careful about the quantification of the extracted TAC. |
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| Practice | Clinical medicine |
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| Keywords | Factor analysis, Dynamic study, Gated blood-pool study, Phantom study. |
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