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関連する概念動画

Intelligence01:27

Intelligence

8.7K
The term "intelligence" is complex because it refers to both behavior and individuals, and its interpretation varies across cultures. European Americans tend to link intelligence with reasoning and cognitive skills, while in Kenya, it is tied to responsible participation in family and social life. In Uganda, intelligence is seen as the ability to know the right actions and carry them out effectively, while the Iatmul people of Papua New Guinea associate it with the capacity to remember...
8.7K
Measures of Intelligence01:29

Measures of Intelligence

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Psychologists measure intelligence by using standardized tests that produce a score known as the intelligence quotient or IQ. To understand IQ tests, it's important to recognize the key principles behind their construction: validity, reliability, and standardization.
Validity refers to how well a test measures what it claims to measure. An intelligence test should accurately assess intelligence rather than another characteristic, like anxiety. Criterion validity is one way to evaluate this;...
8.5K
Multiple Intelligences Theory01:20

Multiple Intelligences Theory

9.0K
Howard Gardner's theory of Multiple Intelligence proposes that there are nine distinct types of intelligence, each reflecting different ways of interacting with the world. Introduced in 1983 and expanded in subsequent years, Gardner's framework challenges the traditional notion of a single, generalized intelligence.
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Cattell's Theory of Intelligence01:25

Cattell's Theory of Intelligence

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Raymond Cattell, along with John Horn, made significant contributions to our understanding of intelligence by distinguishing between two types: fluid intelligence and crystallized intelligence.
Fluid intelligence involves the capacity to solve new problems and adapt to unfamiliar situations. It's the type of intelligence individuals use when they encounter a novel problem or puzzle that requires innovative thinking. For instance, figuring out how to operate a new gadget relies heavily on...
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Triarchic Theory of Intelligence01:24

Triarchic Theory of Intelligence

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Robert Sternberg's triarchic theory of intelligence posits that intelligence is composed of three distinct but interrelated components: analytical, creative, and practical intelligence.
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Biological Influences on Intelligence01:30

Biological Influences on Intelligence

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Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter...
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右室機能の人工知能支援心エコー検査評価

Márton Tokodi, Bryan He, Ádám Szijártó

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    PubMed
    まとめ

    新しい深層学習モデルEchoNet-RVは、心エコー検査を使用して右室機能(RV)を正確に評価します。このツールは、人間のばらつきを上回るRV分数面積変化(RVFAC)の迅速かつ自動的な推定を提供し、疾患サーベイランスを支援します。

    キーワード:
    深層学習心エコー検査右室機能自動評価EchoNet-RV

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    科学分野:

    • 心臓病学
    • 人工知能
    • 医用画像処理

    背景:

    • 右室(RV)機能は心血管系の健康にとって非常に重要ですが、その複雑な解剖学的構造と位置のため、心エコー検査による評価は困難です。
    • RV機能評価における限られた観察者間再現性は、正確な評価を妨げます。

    研究 の 目的:

    • 心エコー検査ビデオからのRV自動セグメンテーションおよびRV分数面積変化(RVFAC)推定のための新しい深層学習モデル、EchoNet-RVを開発すること。
    • 多様なデータセットで専門家によるアノテーションおよび既存モデルと比較してEchoNet-RVのパフォーマンスを評価すること。

    主な方法:

    • 7,169件のエキスパートアノテーション付き心尖部4腔断面(A4C)心エコー検査ビデオでEchoNet-RVをトレーニングしました。
    • 内部(1,320ビデオ)および2つの国際外部テストセット(3,107および1,077ビデオ)でモデルを検証しました。
    • 予測RVFACと臨床転帰(心不全入院または全死因死亡)との関連を評価しました。

    主要な成果:

    • EchoNet-RVは、RVセグメンテーションで高いダイス係数(0.788-0.893)、RVFAC推定で低い平均絶対誤差(5.795-6.362パーセントポイント)を達成しました。
    • 予測誤差は、観察者間変動よりも有意に低かった(p<0.001)。
    • モデルは、RV機能不全の特定において強力なパフォーマンスを示し(AUC 0.684-0.859)、2つのマルチタスクモデルを上回りました。

    結論:

    • EchoNet-RVは、観察者間変動を超えるパフォーマンスで、迅速かつ自動的なRVFAC評価を提供します。
    • このモデルは、臨床現場でのRV機能評価および疾患サーベイランスのための貴重なツールとして大きな可能性を示しています。
    • 予測RVFAC値は、有害な臨床転帰と逆相関しており、予後的価値を強調しています。