JP2022511965A - 人工神経網を利用する臓器の体積測定方法及びその装置 - Google Patents
人工神経網を利用する臓器の体積測定方法及びその装置 Download PDFInfo
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Abstract
Description
一実施例において、前記複数の画像の不確実性数値は、前記神経網モデルの推論手順での結果データの分散推定値に基づいて測定してもよい。
図13は、一実施例に係る医療用電子装置が、腎臓又は肝臓の体積を推定する方法を示すフローチャートである。
したがって、他の実装、他の実施例、及び特許請求の範囲と均等なものも、後述する「特許請求の範囲」の範囲に属する。
Claims (9)
- コンピューティング装置によって実行される臓器の体積測定方法であって、前記臓器を撮像した複数の画像及び撮像メタデータを取得し、前記複数の画像を前処理して指定したサイズの複数の画像パッチ(patch)を取得するステップと、前記複数の画像パッチを3D CNN(Convolutional Neural Network)に基づく神経網モデルに入力し、前記複数の画像パッチのそれぞれに対応する臓器領域を推定するステップと、前記推定された臓器領域の面積及び前記撮像メタデータを用いて前記臓器の体積を測定するステップと、前記神経網モデルの推定結果に基づいて、神経網モデルの不確実性数値及び複数の画像の不確実性数値を測定するステップと、前記複数の画像の不確実性数値に基づいて、前記複数の画像のうちの少なくとも一つの画像を変更するステップと、前記神経網モデルの不確実性数値に基づいて、前記神経網モデルのラベリングポリシーを変更するステップとを含む、臓器の体積測定方法。
- 前記臓器を撮像した複数の画像は、ダイコム(DICOM(Digital Imaging and Communications in Medicine))ファイルから取得したCT画像及び前記臓器に対するラベリング画像を含み、前記撮像メタデータは、前記複数の画像のそれぞれに対する画素間隔データ及び画像の深さデータを含む、請求項1に記載の臓器の体積測定方法。
- 前記複数の画像パッチを取得するステップは、前記複数の画像に含まれている第1画像に対して、データの拡張(Data Augmentation)を実行し、前記第1画像から複数の画像を生成し、前記生成した複数の画像を前処理して複数の画像パッチを取得するステップを含み、前記データの拡張は、前記画像の空間拡大、カラー増強、騒音増強、及びトリミングのうちの一つ以上を含む、請求項1に記載の臓器の体積測定方法。
- 前記複数の画像は、前記の臓器を撮像した複数の3D画像であり、前記複数の画像パッチを取得するステップは、前記複数の3D画像に対して深さ(depth)方向にスライドし、指定したサイズを有する前記複数の画像パッチを取得するステップを含む、請求項1に記載の臓器の体積測定方法。
- 前記神経網モデルは、学習手順及び推論手順でドロップアウト(Dropout)を実行し、前記神経網モデルの不確実性数値は、前記神経網モデルの推論手順での結果データの確率分布に対する分散値に基づいて測定される、請求項1に記載の臓器の体積測定方法。
- 前記複数の画像の不確実性数値は、前記神経網モデルの推論手順での結果データの分散推定値に基づいて測定される、請求項5に記載の臓器の体積測定方法。
- 前記複数の画像の不確実性数値に基づいて前記複数の画像のうちの少なくとも一つの画像を変更するステップは、前記複数の画像の不確実性数値が基準値以上である一つ以上の画像を検出するステップと、前記検出した画像の前記臓器領域に対するユーザーの入力に基づいて、前記検出した画像を変更するステップとを含む、請求項1に記載の臓器の体積測定方法。
- 前記変更されたラベリングポリシーに基づいて、複数の画像の加重値を設定し、前記変更された画像に対して変更前の画像よりも大きい加重値を付与して前記神経網モデルを学習させるステップをさらに含む、請求項7に記載の臓器の体積測定方法。
- 少なくとも一つのテスト画像を取得する入力モジュールと、複数の学習画像及び前記複数の学習画像の中で腎臓に対応する領域又は肝臓に対応する領域の情報に基づく深層学習モデルを記憶するメモリと、前記入力モジュール及び前記メモリに電気的に接続される少なくとも一つのプロセッサとを含む臓器体積測定装置であって、前記少なくとも一つのプロセッサは、前記入力モジュールを介して前記少なくとも一つのテスト画像を取得し、前記記憶された深層学習モデルに基づいて、前記取得した少なくとも一つのテスト画像の中で腎臓に対応する領域又は肝臓に対応する領域を検出し、前記検出した領域の面積を取得し、前記取得した面積に少なくとも基づいて前記取得した少なくとも一つのテスト画像に含まれる腎臓又は肝臓の体積を推定するように構成される臓器体積測定装置。
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US11842485B2 (en) * | 2021-03-04 | 2023-12-12 | GE Precision Healthcare LLC | System and methods for inferring thickness of anatomical classes of interest in two-dimensional medical images using deep neural networks |
KR20240059417A (ko) * | 2022-10-27 | 2024-05-07 | 주식회사 아이도트 | 요로위치 추정 시스템 |
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JP2015205164A (ja) * | 2014-04-10 | 2015-11-19 | 株式会社東芝 | 医用画像表示装置および医用画像表示システム |
JP2017202031A (ja) * | 2016-05-09 | 2017-11-16 | 東芝メディカルシステムズ株式会社 | 医用情報処理装置 |
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US20220036575A1 (en) | 2022-02-03 |
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