JP6721591B2 - 音響的監視システム、監視方法及び監視するコンピュータプログラム - Google Patents
音響的監視システム、監視方法及び監視するコンピュータプログラム Download PDFInfo
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Description
気管音は、上気道における様々な音源から、首の表面にあるセンサまでの距離はかなり短く、肺組織の干渉も無いので、あまりフィルタリングされない、
気管音は、別個に分離可能な呼吸相を持つ、
気管音は、流量の変化に非常に敏感である、
気管音は通例、高い信号対ノイズ比を持つ、
利点を提供する。
(1)スマートフォンに接続される聴診器を用いて、患者に(又は患者の代わりに他の人に)(胸部の異なる位置からの)呼吸音を記録することを求める;
(2)症状の形式(温度、徴候等)をまとめることを求める;
(3)取得したデータをeメールを介して医師に送信する;
システムを開発するのに使用される。
Claims (15)
- 被験者の少なくとも1つの生理学的変数を示す音響信号を供給する、音響信号供給ユニット、
前記音響信号の連続する及び重複する時間ウィンドウのスペクトル表現に基づいて、検出信号を供給するように構成される特徴抽出ユニットであり、前記検出信号は、前記スペクトル表現から抽出される特徴の時系列であり、前記検出信号は、前記音響信号の局所的な構造を簡略化した形式で示している時間領域の信号である、前記特徴抽出ユニット、
前記検出信号を少なくとも1つの検出信号成分に分解するように構成される検出信号分解ユニット、並びに
少なくとも1つの再構成される生理学的信号から前記少なくとも1つの生理学的変数を得るように構成される、生理学的変数供給ユニットであり、前記少なくとも1つの再構成される生理学的信号は、前記少なくとも1つの検出信号成分に基づいている、前記生理学的変数供給ユニット、
を有する、
監視システム。 - 前記スペクトル表現は、離散フーリエ変換又はメル周波数ケプストラム係数である、請求項1に記載の監視システム。
- 前記スペクトル表現は、離散フーリエ変換である、及び前記スペクトル表現から抽出される特徴は、複数の周波数ビンの絶対値を平均する、又は複数の周波数ビンの二乗値を平均することにより得られる、請求項1又は2に記載の監視システム。
- 前記スペクトル表現は、100Hzから800Hzの周波数範囲、及び5Hzのビン分解能を指定して計算される離散フーリエ変換である、請求項1乃至3の何れか一項に記載の監視システム。
- 前記検出信号は、サンプリングされる時間ウィンドウ毎に1つの特徴を含む、請求項1乃至4の何れか一項に記載の監視システム。
- 前記検出信号分解ユニットは、前記検出信号の分解がデータ駆動であるように前記検出信号を分解するように構成される、請求項1乃至5の何れか一項に記載の監視システム。
- 前記検出信号分解ユニットは、特異スペクトル解析及び/又は経験的モード分解の少なくとも一方を行うように構成される、請求項1乃至6の何れか一項に記載の監視システム。
- 前記監視システムは、少なくとも1時間、10時間及び/又は1日の時間期間にわたり前記被験者を監視するように構成される、請求項1乃至7の何れか一項に記載の監視システム。
- 前記音響信号供給ユニットは、前記音響信号を取得するように構成される、目立たないように置かれるセンサを有する、請求項1に記載の監視システム。
- 前記監視システムはさらに、前記少なくとも1つの検出信号成分を前記少なくとも1つの再構成される生理学的信号に割り当てるように構成される較正ユニットを有し、前記少なくとも1つの再構成される生理学的信号は、(i)流量推定信号、(ii)呼吸信号及び/又は(iii)心臓信号の少なくとも1つを有する、及び/又は前記較正ユニットは、生理学的信号及び生理学的信号の特徴に関する先験的知識に基づいて、前記少なくとも1つの検出信号成分を前記少なくとも1つの再構成される生理学的信号に割り当てるように構成される、
請求項1乃至9の何れか一項に記載の監視システム。 - 前記監視システムはさらに、前記音響信号を受信するように構成される前処理ユニットを有し、前記前処理ユニットは、前記音響信号にダウンサンプリングステップを行うように構成され、前記前処理ユニットは、前記ダウンサンプリングステップから得られる信号にハイパスフィルタを適用するように構成されるハイパスフィルタユニットを有する、請求項1乃至10の何れか一項に記載の監視システム。
- 前記監視システムはさらに、前記音響信号、前記少なくとも1つの検出信号成分及び/又は前記少なくとも1つの再構成される生理学的信号の少なくとも1つを表示するように構成される表示ユニットを有する、請求項1乃至11の何れか一項に記載の監視システム。
- 前記監視ユニットはさらに、前記音響信号、前記少なくとも1つの検出信号成分及び/又は前記少なくとも1つの再構成される生理学的信号の少なくとも1つを記憶するように構成される記憶装置ユニットを有する、請求項1乃至12の何れか一項に記載の監視システム。
- 監視システムによる監視方法であり、前記監視システムは、音響信号供給ユニット、特徴抽出ユニット、検出信号分解ユニット及び生理学的変数供給ユニットを有し、
前記音響信号供給ユニットが、被験者の少なくとも1つの生理学的変数を示す音響信号を供給するステップ、
前記特徴抽出ユニットが、前記音響信号の連続する及び重複する時間ウィンドウのスペクトル表現に基づいて、検出信号を供給するステップであり、前記検出信号は、前記連続する及び重複する時間ウィンドウに対し抽出される特徴の時系列であり、前記検出信号は、前記音響信号の局所的な構造を簡略化した形式で示している時間領域の信号である、前記検出信号を供給するステップ、
前記検出信号分解ユニットが、前記検出信号を少なくとも1つの検出信号成分に分解するステップ、及び
前記生理学的変数供給ユニットが、少なくとも1つの再構成される生理学的信号から前記少なくとも1つの生理学的変数を得るステップであり、前記少なくとも1つの再構成される生理学的信号は、前記少なくとも1つの検出信号成分に基づいている、前記少なくとも1つの生理学的変数を得るステップ、
を有する、
監視方法。 - 監視するコンピュータプログラムであり、前記コンピュータプログラムが請求項1乃至13の何れか一項に記載の監視システムを制御するコンピュータ上で実行されるとき、前記コンピュータプログラムは、前記監視システムに請求項14に記載の監視方法のステップを行わせるためのプログラムコード手段を有する、監視するコンピュータプログラム。
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PCT/EP2015/077858 WO2016091612A1 (en) | 2014-12-12 | 2015-11-27 | Acoustic monitoring system, monitoring method, and monitoring computer program |
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JP2017536905A (ja) | 2017-12-14 |
RU2017124900A3 (ja) | 2019-06-18 |
WO2016091612A1 (en) | 2016-06-16 |
CN106999143A (zh) | 2017-08-01 |
CN106999143B (zh) | 2020-08-04 |
EP3229692A1 (en) | 2017-10-18 |
US10898160B2 (en) | 2021-01-26 |
EP3229692B1 (en) | 2019-06-12 |
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US20170325779A1 (en) | 2017-11-16 |
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