JP6144916B2 - 生体組織画像のノイズ低減処理方法及び装置 - Google Patents
生体組織画像のノイズ低減処理方法及び装置 Download PDFInfo
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- G06F18/20—Analysing
- G06F18/23—Clustering techniques
- G06F18/231—Hierarchical techniques, i.e. dividing or merging pattern sets so as to obtain a dendrogram
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- G06—COMPUTING; CALCULATING OR COUNTING
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/70—Arrangements for image or video recognition or understanding using pattern recognition or machine learning
- G06V10/762—Arrangements for image or video recognition or understanding using pattern recognition or machine learning using clustering, e.g. of similar faces in social networks
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Description
上記測定されるスペクトルとしては、紫外、可視、赤外域の分光スペクトル、ラマン分光スペクトル、及び質量スペクトル等を挙げることができる。
本発明の一実施形態では、イオン、電子、中性粒子、およびレーザー光からなる群から選択される一次プローブを用いる質量分析法により生体組織切片の二次元質量スペクトルを測定し、該二次元質量スペクトルから生体組織画像を取得する際に、質量スペクトルのリファレンスデータを用いてノイズ低減を行う。
測定データ=a×固有スペクトルA+b×固有スペクトルB+C×固有スペクトルC+…+as×共通ピークA+bs×共通ピークB+…+n×ノイズ成分 …式(1)
測定データ=a×固有スペクトルA+b×固有スペクトルB+c×固有スペクトルC+…+as×共通ピークA+bs×共通ピークB+ …式(2)
なお、図10(c)において、識別軸1はノイズ成分と生体組織1を、識別軸2は生体組織1と生体組織2を分離する軸である。この識別軸1により、生体組織に固有のスペクトルとノイズ成分とを分離することができる。
一次イオン:25kV Bi+、0.6pA(パルス電流値)、マクロラスター・スキャンモード
一次イオンのパルス周波数:5kHz(200μs/ショット)
一次イオンパルス幅:約0.8ns
一次イオンビーム直径:約0.8μm
測定範囲:4mm × 4mm
二次イオンの測定画素数:256×256
積算時間:1画素512shots, 1回スキャン(約150分)
二次イオンの検出モード:正イオン
図12は、図11の(b)と(c)の一部を拡大したものである。図12の(a)は、本手法の適用前の画像を、図12の(b)は適用後の画像を示している。本手法の適用により、ノイズが低減され、画像のコントラストが向上し、輪郭がより明確になっていることがわかる。
Claims (4)
- 空間内に組成分布を持つ測定対象を測定して得られた、該空間内の複数の座標にそれぞれ対応する複数の測定スペクトルデータを用いて、該測定対象の該空間内における組成分布を表す画像データを取得する画像取得方法において、
以前に取得した経験的データを利用して生成した識別器を用い、前記複数の測定スペクトルデータのそれぞれについて、全スペクトルを前記測定対象に特徴的な代表的固有スペクトルに分解し、該代表的固有スペクトルから画像データを取得することでノイズ低減を行うことを特徴とする方法。 - Fisherの線形判別法、SVM(Support Vector Machine)、決定木またはランダムフォレスト法を用いて前記識別器を生成する、請求項1記載の方法。
- 前記測定スペクトルが、紫外、可視、赤外域の分光スペクトル、ラマン分光スペクトル、及び質量スペクトルのいずれかである、請求項1または2に記載の方法。
- 試料を載置する基板と、該基板上に載置した試料の複数の位置に一次ビームを照射する手段と、一次ビームの照射により該試料の複数の位置から発生する二次ビームを検出して検出信号を発生する検出器と、該検出器が発生した検出信号から生成した該複数の位置のそれぞれに対応する測定スペクトルデータを処理して画像データを取得する信号処理手段と、該信号処理手段が取得した画像データに基づいて画像を画面に表示する画像表示手段とを含む画像取得装置であって、前記信号処理手段が、請求項1乃至3のいずれか一項に記載の方法を用いて該測定スペクトルデータを処理することにより該画像データを取得するように構成されていることを特徴とする装置。
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US13/746,465 US9008407B2 (en) | 2012-01-30 | 2013-01-22 | Noise reduction processing method and apparatus for a biological tissue image |
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WO2011063493A1 (en) * | 2009-11-27 | 2011-06-03 | Dog Microsystems Inc. | Method and system for filtering image data and use thereof in virtual endoscopy |
US9025850B2 (en) | 2010-06-25 | 2015-05-05 | Cireca Theranostics, Llc | Method for analyzing biological specimens by spectral imaging |
US9129371B2 (en) * | 2010-06-25 | 2015-09-08 | Cireca Theranostics, Llc | Method for analyzing biological specimens by spectral imaging |
JP6144915B2 (ja) | 2012-01-30 | 2017-06-07 | キヤノン株式会社 | 生体組織画像の再構成方法、取得方法及び装置 |
JP6235886B2 (ja) | 2013-01-08 | 2017-11-22 | キヤノン株式会社 | 生体組織画像の再構成方法及び装置並びに該生体組織画像を用いた画像表示装置 |
JP6665999B2 (ja) * | 2015-07-23 | 2020-03-13 | 日本電気株式会社 | データ処理装置、決定木生成方法、識別装置及びプログラム |
US10460439B1 (en) | 2015-08-12 | 2019-10-29 | Cireca Theranostics, Llc | Methods and systems for identifying cellular subtypes in an image of a biological specimen |
EP3605062A1 (en) * | 2018-07-31 | 2020-02-05 | INESC TEC - Instituto de Engenharia de Sistemas e Computadores, Tecnologia e Ciência | A method and apparatus for characterisation of constituents in a physical sample from electromagnetic spectral information |
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WO2008126151A1 (ja) * | 2007-04-04 | 2008-10-23 | Shimadzu Corporation | 質量分析データ解析方法及び装置 |
PT2145276T (pt) * | 2007-04-05 | 2020-07-30 | Fund D Anna Sommer Champalimaud E Dr Carlos Montez Champalimaud | Sistemas e métodos de tratamento, diagnóstico e previsão da ocorrência de uma condição médica |
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JP5348029B2 (ja) * | 2010-03-16 | 2013-11-20 | 株式会社島津製作所 | 質量分析データ処理方法及び装置 |
US9129371B2 (en) * | 2010-06-25 | 2015-09-08 | Cireca Theranostics, Llc | Method for analyzing biological specimens by spectral imaging |
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JP2012176096A (ja) * | 2011-02-25 | 2012-09-13 | Sumitomo Electric Ind Ltd | 生体検査装置および生体検査方法 |
JP6144915B2 (ja) | 2012-01-30 | 2017-06-07 | キヤノン株式会社 | 生体組織画像の再構成方法、取得方法及び装置 |
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