JP5474758B2 - 医療画像データを分析するための方法、装置およびコンピュータプログラム - Google Patents
医療画像データを分析するための方法、装置およびコンピュータプログラム Download PDFInfo
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Description
−データを、それぞれが異なる帯域幅を有する複数の帯域通過フィルタによりフィルタリングするステップと、
−各フィルタからのフィルタリングされたデータから、テクスチャパラメータを決定するステップと、
−バイオマーカーとして使用するために、テクスチャパラメータの少なくとも1つの比率を決定するステップと、
を備える方法が提供される。
−医療画像データを、それぞれが異なる帯域幅を有する複数の帯域通過フィルタによりフィルタリングするための手段と、
−各フィルタからのフィルタリングされたデータから、テクスチャパラメータを決定するための手段と、
−バイオマーカーとして使用するために、テクスチャパラメータの少なくとも1つの比率を決定するための手段と、
を備える装置が提供される。
Claims (16)
- 医療画像データを分析してバイオマーカーを生成する方法であって、
−前記データを、複数の非直交円形対称な帯域通過ウェーブレットフィルタによりフィルタリングして、前記画像データにおけるテクスチャを抽出するステップであって、前記複数のフィルタのそれぞれは、異なるスケールのテクスチャを抽出するための異なる帯域幅を有する、ステップと、
−各フィルタからのフィルタリングされた前記データから、テクスチャパラメータを決定するステップと、
−診断指標または予後指標として使用されるバイオマーカーとして使用するために、互いにスケールが異なる、前記決定された2つの前記テクスチャパラメータ間の比率を、少なくとも1つ決定するステップと、
を備えることを特徴とする方法。 - フィルタリングするステップでは、少なくとも、
周波数領域における相対的に低い帯域幅をフィルタリングして、前記画像データにおける相対的に粗い特徴を抽出するとともに、
周波数領域における相対的に高い帯域幅をフィルタリングして、前記画像データにおける相対的に細部の特徴を抽出することを特徴とする請求項1に記載の方法。 - 前記帯域通過フィルタは、ガウシアンのラプラシアン帯域通過フィルタ、または、ガウシアンの差帯域通過フィルタである、ことを特徴とする請求項1または2に記載の方法。
- 前記画像データの異なる標準偏差は、各フィルタがフィルタごとに異なる帯域幅を与えるよう、選択されることを特徴とする請求項3に記載の方法。
- 前記テクスチャパラメータは、平均階調輝度、エントロピー、均一性、のうちの少なくとも1つの指標を含む、ことを特徴とする請求項1乃至4のいずれかに記載の方法。
- 前記画像データは、X線画像、磁気共鳴画像、超音波画像、断層撮影画像、肝臓断層撮影画像、陽電子放射断層撮影画像、単光子放射コンピュータ断層撮影画像、マンモグラフィ画像のいずれかを表す、ことを特徴とする請求項1乃至5のいずれかに記載の方法。
- 前記画像データは、2次元または3次元画像のいずれかを表す、ことを特徴とする請求項1乃至6のいずれかに記載の方法。
- 医療画像データを分析してバイオマーカーを生成するための装置であって、
−医療画像データを、複数の非直交円形対称な帯域通過ウェーブレットフィルタによりフィルタリングして、前記画像データにおけるテクスチャを抽出するための手段であって、前記複数のフィルタのそれぞれは、異なるスケールのテクスチャを抽出するための異なる帯域幅を有する、手段と、
−各フィルタからのフィルタリングされた前記データから、テクスチャパラメータを決定するための手段と、
−診断指標または予後指標として使用されるバイオマーカーとして使用するために、前記テクスチャパラメータの少なくとも1つの比率を決定するための手段と、
を備えることを特徴とする装置。 - 前記複数のフィルタは、少なくとも、
前記画像データにおける相対的に粗い特徴を抽出するために、周波数領域における相対的に低い帯域幅をフィルタリングするように構成されるフィルタと、
前記画像データにおける相対的に細部の特徴を抽出するために、周波数領域における相対的に高い帯域幅をフィルタリングするように構成されるフィルタと、を含むことを特徴とする請求項8に記載の装置。 - 前記帯域通過フィルタは、ガウシアンのラプラシアン帯域通過フィルタ、または、ガウシアンの差帯域通過フィルタである、ことを特徴とする請求項9に記載の装置。
- 前記画像データの異なる標準偏差は、各フィルタがフィルタごとに異なる帯域幅を与えるよう、選択されることを特徴とする請求項10に記載の装置。
- 前記テクスチャパラメータを、平均階調輝度、エントロピー、均一性、のうちの少なくとも1つの指標として決定するための手段を備える、ことを特徴とする請求項8乃至11のいずれかに記載の装置。
- 前記バイオマーカーを、閾値と比較するための手段を備える、ことを特徴とする請求項8乃至12のいずれかに記載の装置。
- 処理手段によって処理された際に、請求項1乃至7のいずれかに記載の方法を実行することを特徴とするコンピュータプログラム。
- 請求項1乃至7のいずれかに記載の方法を実行するためのコンピュータプログラムを備えることを特徴とするコンピュータ読み取り可能な媒体。
- 患者の状態を診断または予測するための装置であって、バイオマーカーを閾値と比較するための手段を備え、
前記バイオマーカーは、
医療画像データを、複数の非直交円形対称な帯域通過ウェーブレットフィルタによりフィルタリングして、前記画像データにおけるテクスチャを抽出することであって、前記複数のフィルタのそれぞれは、異なるスケールのテクスチャを抽出するための異なる帯域幅を有する、ことと、
各フィルタからのフィルタリングされたデータからテクスチャパラメータを決定することと、
前記バイオマーカーとして使用するために、互いにスケールが異なる、前記決定された2つの前記テクスチャパラメータ間の比率を決定することと、により、医療画像から決定されたテクスチャパラメータの比率を備える、ことを特徴とする装置。
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GBGB0705223.6A GB0705223D0 (en) | 2007-03-19 | 2007-03-19 | Method, apparatus and computer program for analysing medical image data |
GB0705223.6 | 2007-03-19 | ||
PCT/GB2008/000977 WO2008114016A2 (en) | 2007-03-19 | 2008-03-19 | Method, apparatus and computer program for analysing medica image data |
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EP (2) | EP2846293A3 (ja) |
JP (1) | JP5474758B2 (ja) |
CA (1) | CA2682267C (ja) |
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WO2008114016A3 (en) | 2008-12-31 |
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