JP2022147328A - 細胞計数方法、細胞計数のための機械学習モデルの構築方法、プログラムおよび記録媒体 - Google Patents
細胞計数方法、細胞計数のための機械学習モデルの構築方法、プログラムおよび記録媒体 Download PDFInfo
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Abstract
Description
10 試料容器
13 撮像部
14 制御部
C 細胞
E 胚(細胞塊)
Ih,Iu ヒートマップ
Is 教師画像
S 試料
ST 画像スタック
Claims (12)
- 細胞塊を構成する細胞の個数を計数する細胞計数方法であって、
前記細胞塊を互いに異なる焦点深さで明視野撮像した、複数の画像を含む画像スタックを取得する工程と、
機械学習モデルを用いて、前記複数の画像それぞれに対応する複数のヒートマップを作成する工程と、
前記ヒートマップの各々からピークを検出する工程と、
検出された前記ピークのうち、互いに異なる前記ヒートマップに属し、かつマップ平面に沿った方向における距離および前記焦点深さ方向における距離のそれぞれが所定値より小さいピーク同士を相互に関連付ける工程と、
関連付けられた複数の前記ピークについては1つのピークと見なして前記ピークの数を計数する工程と
を備え、
前記機械学習モデルは、
細胞の明視野画像である教師画像と、
当該教師画像内で合焦した細胞の輪郭の内側でその外側よりも大きく、かつ細胞中心部に近いほど大きくなる重みを与えたヒートマップである正解画像と
のセットを教師データとする機械学習により構築されたものである、細胞計数方法。 - 互いに異なる前記ヒートマップから検出され、かつ前記マップ平面に沿った方向において互いの距離が第1の閾値より小さい複数の前記ピークのうち、当該ピークが検出された前記ヒートマップに対応する前記画像が撮像されたときの前記焦点深さの差が第2の閾値より小さいもの同士を関連付ける、請求項1に記載の細胞計数方法。
- 前記第1の閾値と前記第2の閾値とが同値である、請求項2に記載の細胞計数方法。
- 前記教師画像は、計数の対象となる前記細胞塊と同種の細胞塊を撮像した画像である、請求項1ないし3のいずれかに記載の細胞計数方法。
- 請求項1ないし4のいずれかに記載の細胞計数方法の各工程をコンピューターに実行させるための、プログラム。
- 細胞の明視野画像である教師画像を複数取得する工程と、
前記教師画像の各々について、当該教師画像内で合焦した細胞の輪郭の内側でその外側よりも大きく、かつ細胞中心に近いほど大きくなる重みを与えた擬似的なヒートマップである正解画像を作成する工程と、
前記教師画像と前記正解画像とのセットを教師データとして機械学習を実行し機械学習モデルを構築する工程と
を備える、細胞計数のための機械学習モデルの構築方法。 - 前記教師画像は、少なくとも1つの細胞の周縁部に合焦した画像を含む、請求項6に記載の細胞計数のための機械学習モデルの構築方法。
- 前記教師画像は、細胞塊を互いに異なる焦点深さで明視野撮像した複数の画像から選択される、請求項6または7に記載の細胞計数のための機械学習モデルの構築方法。
- 取得された前記教師画像の各々につき、当該教師画像中の細胞の輪郭を教示する教示入力を受け付け、
前記ヒートマップでは、教示された前記輪郭で囲まれた領域の内部に、その外部よりも大きく、かつ当該領域の中心部に近いほど大きくなる重みを与える、請求項6ないし8のいずれかに記載の細胞計数のための機械学習モデルの構築方法。 - 前記ヒートマップにおける重み付けは、前記細胞中心を中心とする二次元ガウス分布に沿ったものである、請求項6ないし9のいずれかに記載の細胞計数のための機械学習モデルの構築方法。
- 請求項6ないし10のいずれかに記載の細胞計数のための機械学習モデルの構築方法の各工程をコンピューターに実行させるための、プログラム。
- 請求項5または11に記載のプログラムを非一時的に記録した、コンピューター読み取り可能な記録媒体。
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JP2021048521A JP7664723B2 (ja) | 2021-03-23 | 2021-03-23 | 細胞計数方法、細胞計数のための機械学習モデルの構築方法、プログラムおよび記録媒体 |
PCT/JP2022/010644 WO2022202368A1 (ja) | 2021-03-23 | 2022-03-10 | 細胞計数方法、細胞計数のための機械学習モデルの構築方法、コンピュータープログラムおよび記録媒体 |
KR1020237029737A KR20230136760A (ko) | 2021-03-23 | 2022-03-10 | 세포 계수 방법, 세포 계수를 위한 기계 학습 모델의 구축 방법, 컴퓨터 프로그램 및 기록 매체 |
US18/281,677 US20240169523A1 (en) | 2021-03-23 | 2022-03-10 | Cell counting method, machine learning model construction method and recording medium |
EP22775160.9A EP4317403A4 (en) | 2021-03-23 | 2022-03-10 | CELL COUNTING METHOD, METHOD FOR CONSTRUCTING MACHINE LEARNING MODEL FOR CELL COUNTING, COMPUTER PROGRAM, AND STORAGE MEDIUM |
CN202280021515.2A CN117099128A (zh) | 2021-03-23 | 2022-03-10 | 细胞计数方法、用于细胞计数的机器学习模型的构建方法、计算机程序及记录介质 |
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