JP7135050B2 - 血管内画像処理のための血管内画像処理装置、方法及び非一時的記憶媒体 - Google Patents
血管内画像処理のための血管内画像処理装置、方法及び非一時的記憶媒体 Download PDFInfo
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Description
本願は、2019年10月16日に出願された米国仮特許出願第62/915,918号(その全体が参照により本明細書に組み込まれる)からの優先権の利益を主張する。
図1は、本例示実施形態に係る画像処理装置100のハードウェア構成を示すブロック図である。
本実施形態では、血管内OCT及び蛍光マルチモダリティ構成のMMOCTによる冠動脈のイメージングを説明する。第1の実施形態の構成は、得られた蛍光データに基づいて、2Dビューの向き及び位置を自動的に提供することができる。
本実施形態のMMOCTでは、プルバックデータが記録される。データは、メモリ及び/又はハードドライブに保存される。データは信号処理を受け、画像からガイドワイヤアーチファクトが除去される。ガイドワイヤアーチファクトは、以下のステップを通して画像から抽出される。高NIRAF検出が実施される。図14に示されるように、高NIRAF信号に基づいて表示角度が決定される。決定された角度での初期表示のために、データセットが作成される。処理された画像はディスプレイに表示され、また、操作角度で見ることができる。
本実施形態のMMOCTでは、プルバックデータが記録される。データは、メモリ及び/又はハードドライブに保存される。データは信号処理を受け、画像からガイドワイヤアーチファクトが除去される。ガイドワイヤアーチファクトは、以下のステップを通して画像から抽出される。ガイドワイヤ検出が実施され、ガイドワイヤ情報に基づいて表示角度が決定される。決定された角度での初期表示のために、データセットが作成される。処理された画像はディスプレイに表示され、また、操作角度で見ることができる。
本実施形態のMMOCTでは、プルバックデータは、メモリ及び/又はハードドライブに記録及び保存される。データは信号処理を受け、画像からガイドワイヤアーチファクトが除去される。ガイドワイヤアーチファクトは、以下のステップを通して画像から抽出される。ガイドワイヤ検出が実施され、ガイドワイヤ情報に基づいて表示角度が決定される。決定された角度での初期表示のために、データセットが作成される。処理された画像はディスプレイに表示され、また、操作角度で見ることができる。
本開示の実施形態は、記憶媒体(より完全には「非一時的コンピュータ可読記憶媒体」と呼ぶこともできる)に記録されたコンピュータ実行可能命令(例えば1つ以上のプログラム)を読み出し実行して、前述の実施形態のうち1つ以上の機能を実行し、かつ/又は、前述の実施形態のうち1つ以上の機能を実行するための1つ以上の回路(例えば特定用途向け集積回路(ASIC))を含むシステム又は装置のコンピュータ化構成によって実現することもできるし、また、システム又は装置のコンピュータ化構成が、記憶媒体からコンピュータ実行可能命令を読み出し実行して、前述の実施形態のうち1つ以上の機能を実行すること、及び/又は1つ以上の回路を制御して、前述の実施形態のうち1つ以上の機能を実行することによって実行される方法によって実現することもできる。コンピュータ化構成は、1つ以上のプロセッサ、1つ以上のメモリ、回路又はそれらの組合せ(例えば中央処理装置(CPU)、マイクロプロセシングユニット(MPU)等)を備えてよく、コンピュータ実行可能命令を読み出して実行するために別個のコンピュータ又は別個のプロセッサのネットワークを含んでよい。コンピュータ実行可能命令は、例えばネットワークク又は記憶媒体から、コンピュータ化構成に提供することができる。記憶媒体は、例えば、ハードディスク、ランダムアクセスメモリ(RAM)、リードオンリーメモリ(ROM)、分散コンピューティングシステムのストレージ、光ディスク(コンパクトディスク(CD)、デジタル多用途ディスク(DVD)又はBlu-ray Disc(BD)(商標)等)、フラッシュメモリデバイス、メモリカード等のうち1つ以上を含んでよい。
Claims (18)
- 少なくとも1つのプロセッサを備えた血管内画像処理装置の血管内画像処理方法であって、前記方法は、前記少なくとも1つのプロセッサが、
管腔の一部の血管内データを取得するステップと、
前記取得された血管内データの特性に基づいてROI(関心領域)又は欠陥領域を決定するステップと、
(a)前記決定されたROIに基づいて、前記ROIが現れるように向き及び/又は角度を調節することにより、又は、(b)前記決定された欠陥領域に基づいて、前記欠陥領域が現れないように前記向き及び/又は角度を調節することにより、前記管腔の前記一部の初期長手方向ビューを決定するステップと、
ユーザインタラクションを伴わずに、前記管腔の前記一部の前記初期長手方向ビュー及び断層撮影ビューを自動的に表示するステップと、
を実行することを含む、方法。 - 前記特性は、(a)前記取得された血管内データの蛍光又は組織特性、又は、(b)前記取得された血管内データの影である、請求項1に記載の方法。
- 前記少なくとも1つのプロセッサが、人工知能又は機械学習を用いて前記血管内データを処理するステップ、
を更に含む、請求項1に記載の方法。 - 前記処理するステップは反復型である、請求項3に記載の方法。
- 記録モード、処理モード及びレビューモードを含む、請求項1に記載の方法。
- 前記血管内データはMMOCT(マルチモダリティ光干渉断層撮影法)によって取得される、請求項1に記載の方法。
- 前記MMOCTは、OCT(光干渉断層撮影法)、IVUS(血管内超音波検査)、NIRF(近赤外蛍光)、NIRAF(近赤外自家蛍光)及びNIRS(近赤外分光法)のうち1つ以上を含む、請求項6に記載の方法。
- 前記ROIは、
(a)高蛍光領域及び組織特性、又は、
(b)ガイドワイヤ及び非蛍光領域、
のうち1つ以上を含む、請求項1に記載の方法。 - 前記組織特性は、脂質、石灰化、分岐、薄被膜線維性粥腫、エッジ解離、ステント不完全圧着、ステント拡張不良、血栓、組織突出及び狭窄のうち1つ以上を含む、請求項8に記載の方法。
- 前記少なくとも1つのプロセッサが、ディスプレイ上にボタンを表示するステップと、前記表示されたボタンのクリックに応答して、前記初期長手方向ビューを表示するステップと、
を更に含む、請求項1に記載の方法。 - 前記初期長手方向ビューは、断面長手方向ビュー又は3次元半管カット長手方向ビューである、請求項10に記載の方法。
- 前記少なくとも1つのプロセッサが、前記初期長手方向ビューの決定のために前記ROIのタイプを事前設定するステップ、
を更に含む、請求項1に記載の方法。 - 複数のROIがある場合に、
前記複数のROIのうち1つを選択するステップと、
表示ボタンのクリックにより、別のROIに移るステップと、
を含む、請求項1に記載の方法。 - 前記少なくとも1つのプロセッサが、前記複数のROIを同時に表示するステップ、
を更に含む、請求項13に記載の方法。 - 前記少なくとも1つのプロセッサが、前記断層撮影ビュー上に前記向き及び/又は角度を表示するステップ、
を更に含む、請求項1に記載の方法。 - 前記少なくとも1つのプロセッサが、前記決定されたROIに基づいて、前記管腔の前記一部の前記初期長手方向ビューを表示するための長手方向における位置を決定するステップ、
を更に含む、請求項1に記載の方法。 - 管腔の一部の血管内データを取得し、
前記取得された血管内データの特性に基づいてROI(関心領域)又は欠陥領域を決定し、
(a)前記決定されたROIに基づいて、前記ROIが現れるように向き及び/又は角度を調節することにより、又は、(b)前記決定された欠陥領域に基づいて、前記欠陥領域が現れないように前記向き及び/又は角度を調節することにより、前記管腔の前記一部の初期長手方向ビューを決定し、
ユーザインタラクションを伴わずに、前記管腔の前記一部の前記初期長手方向ビュー及び断層撮影ビューを自動的に表示する
ように構成された少なくとも1つのプロセッサを備えた、血管内画像処理装置。 - 画像処理装置のための血管内画像処理方法をコンピュータに実行させるためのプログラムを格納している非一時的記憶媒体であって、前記方法は、
管腔の一部の血管内データを取得するステップと、
前記取得された血管内データの特性に基づいてROI(関心領域)又は欠陥領域を決定するステップと、
(a)前記決定されたROIに基づいて、前記ROIが現れるように向き及び/又は角度を調節することにより、又は、(b)前記決定された欠陥領域に基づいて、前記欠陥領域が現れないように前記向き及び/又は角度を調節することにより、前記管腔の前記一部の初期長手方向ビューを決定するステップと、
ユーザインタラクションを伴わずに、前記管腔の前記一部の前記初期長手方向ビュー及び断層撮影ビューを自動的に表示するステップと、
を含む、非一時的記憶媒体。
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