JP2022523199A - 血管造影撮像システムの時間的較正 - Google Patents
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Abstract
Description
この出願は、2019年3月8日に出願された米国仮出願第62/815,476号の優先権を主張しており、その内容は参照によりその全体が本明細書に組み込まれている。
10×(ダイヤル1の位置1)/(2π)
1×(ダイヤル2の位置2)/(2π)
10×(ダイヤル1の位置1)/(2π)+1×(ダイヤル2の位置2)/(2π)
Claims (23)
- 放射線発生器と放射線検出器アレイとの間に複数の可動放射線不透過マーカを配置し、
各前記複数の放射線不透過マーカをそれぞれの周波数で移動させ、
前記放射線不透過マーカが移動している間に一連のX線画像を取得し、各画像は、前記複数の可動放射線不透過マーカによって投影された動的に生成された透かしを含み、各前記放射線不透過マーカの位置が前記透かし上に示されている、X線画像の動的タイムスタンプの透かしの方法。 - 各前記複数の放射線不透過マーカをそれぞれの周波数で回転させ、
前記一連の画像を処理して、各前記複数のマークの回転位置を測定する、請求項1に記載の方法。 - 前記測定された回転位置と、各前記複数の放射線不透過マーカの前記それぞれの周波数とに基づいてタイムスタンプを決定する、請求項2に記載の方法。
- 前記透かしは、1秒未満の精度でタイムスタンプを符号化する、請求項1に記載の方法。
- 各前記放射線不透過マーカはダイヤルの形態であり、複数のダイヤルの各々は国際時間標準に同期したコントローラによって決定された速度で回転している、請求項1に記載の方法。
- 前記透かしを復号化してタイムスタンプを生成し、
前記復号されたタイムスタンプに基づいてメタデータのタイムスタンプを修正する、請求項1に記載の方法。 - 前記放射線不透過マーカはダイヤルの形態であり、複数のダイヤルの各々は、モータを含むか、モータに接続されており、
前記関連するダイヤルを同じ周波数で回転させるように、各前記モータを異なる特定の前記周波数で回転させる、ことをさらに含む、請求項1に記載の方法。 - 各前記放射線不透過マーカがダイヤルの形態であり、異なる周波数で回転する少なくとも2つのダイヤルが1秒未満の精度を得るために用いられる、請求項1に記載の方法。
- 前記放射線不透過マーカは回転するように構成されている、請求項1に記載の方法。
- 各前記放射線不透過マーカは回転可能なダイヤルを含む、請求項1に記載の方法。
- 前記複数の放射線不透過ダイヤルに関連する前記それぞれの周波数は互いに異なる、請求項1に記載の方法。
- 複数のモータと、
前記複数のモータの操作に応答してそれぞれ選択的に回転するように構成された、モータに直接または間接的に接続された放射線不透過性マーカと、
各前記複数のモータの動作を制御して各前記モータをそれぞれの周波数で回転させるように構成され、前記対応する放射線不透過マーカをそれぞれの周波数で回転するように構成されたコントローラと、
1つ以上のコンピュータプロセッサと、
1つ以上のコンピュータ可読記憶媒体と、
前記1つまたは複数のコンピュータプロセッサのうちの少なくとも1つによる実行のために前記1つまたは複数のコンピュータ可読記憶媒体に記憶されたプログラム命令と、を含み、
前記プログラム命令が、一連のX線画像を処理してタイムスタンプを生成するための命令を含み、そこにおいて、各前記画像は、前記タイムスタンプに対応する動的に生成された透かし符号化情報を含み、前記動的に生成された透かしは、前記複数の可動放射線不透過マーカによって投影される、
X線画像の動的タイムスタンプの透かしのためのシステム。 - 各前記放射線不透過マーカは、X線源からX線検出アレイ上に移動するX線からピクセルを不透過化して、透かしのピクセルアレイ内に画像を形成する、請求項12に記載のシステム。
- 前記プログラム命令は、前記プロセッサが、
前記透かしから生成されたタイムスタンプを画像メタデータに含まれるタイムスタンプと比較し、
前記透かしから生成された前記タイムスタンプに基づいて、人間の臨床血管造影中に取得された前記画像に関連付けられたメタデータのタイムスタンプを修正する、命令をさらに含む、請求項12に記載のシステム。 - 前記コントローラが国際時間標準に同期されている、請求項12に記載のシステム。
- 前記少なくとも2つの放射線不透過性マーカが1秒未満の精度を得るために用いられている、請求項12に記載のシステム。
- 少なくとも3つの放射線不透過性マーカがタイムスタンプを符号化するために用いられ、
前記プログラム命令が、前記タイムスタンプを、前記画像に対応するメタデータのタイムスタンプを使用せずに、1秒未満の精度を有するタイムスタンプに変換する命令をさらに含む、請求項12に記載のシステム。 - プログラム命令が集合的に組み込まれた1つまたは複数のコンピュータ可読記憶媒体を含み、
コンピュータによって実行可能な前記プログラム命令は、前記コンピュータに、放射線発生器と放射線検出器アレイとの間に配置された複数の可動放射線不透過マーカに対応する動的に生成された透かしを含む各一連のX線画像を取得させ、各前記放射線不透過マーカの回転位置がマークとして前記透かし上に投影され、各前記放射線不透過マーカがそれぞれの周波数に関連付けられ、
各前記複数のマーカの回転位置を決定させる、
動的タイムスタンプの透かしに基づいてタイムスタンプを決定するためのコンピュータプログラム製品。 - 前記プログラム命令は、前記コンピュータにさらに、前記測定された回転位置と、前記透かしの各前記複数のマークの既知の周波数とに基づいて、タイムスタンプを決定させる、請求項18に記載のコンピュータプログラム製品。
- 前記タイムスタンプは、1秒未満の精度を有する、請求項19に記載のコンピュータプログラム製品。
- 前記透かしは、国際時間標準に従って回転するように構成された複数の放射線不透過マーカに対応する、請求項18に記載のコンピュータプログラム製品。
- 前記プログラム命令は、前記コンピュータにさらに、
前記透かしを復号化してタイムスタンプを生成させ、
前記復号化したタイムスタンプに基づいてメタデータのタイムスタンプを修正させる、
請求項18に記載のコンピュータプログラム製品。 - 前記プログラム命令は、前記コンピュータにさらに、
複数の放射線不透過マーカに対応する透かしからタイムスタンプを決定させ、
各前記放射線不透過マーカは、前記放射線不透過マーカを所定の周波数で回転させるように構成されたモータによって回転される、請求項18に記載のコンピュータプログラム製品。
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PCT/US2020/021754 WO2020185706A1 (en) | 2019-03-08 | 2020-03-09 | Temporal calibration of an angiographic imaging system |
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KR102628083B1 (ko) | 2019-02-06 | 2024-01-26 | 윌리암 이. 버틀러 | 복수의 저차원 혈관 조영 프로젝션들로부터 움직이는 혈관 맥파의 시공간적 재구성 |
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CN113507887B (zh) | 2023-12-05 |
KR20210124380A (ko) | 2021-10-14 |
CA3130150A1 (en) | 2021-09-17 |
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US11282202B2 (en) | 2022-03-22 |
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