JP6417000B2 - 医療用撮像スキャンに起因する患者の放射線量を予測するための適切なモデルの作成 - Google Patents
医療用撮像スキャンに起因する患者の放射線量を予測するための適切なモデルの作成 Download PDFInfo
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Description
Claims (12)
- 第1の個人に対応する撮像モデルを作成するためのコンピュータ実施方法であって、
撮像スキャンを受ける前記第1の個人に関する初期数学ファントムを選択するステップであって、前記選択するステップは、前記第1の個人の年齢および性別に基づく、ステップと、
前記第1の個人の1つまたは複数のスカウト画像を受信するステップと、
前記初期数学ファントムにうまく一致する、体の幾何学的形状、サイズ、および位置を有するローカライザー画像の参照セットを複数の個人から得られた画像から選択するステップと、
前記ローカライザー画像のうちの少なくとも1つと前記第1の個人の前記スカウト画像のうちの少なくとも1つとの間の変換を決定するステップと、
前記変換に基づいて前記初期数学ファントムを変形させるステップであって、前記変換によりもたらされる変形された数学ファントムは、前記第1の個人のサイズ、形状、および臓器の位置によりよく一致する、ステップとを含む、コンピュータ実施方法。 - 前記ローカライザー画像のうちの少なくとも1つと前記第1の個人の前記スカウト画像のうちの少なくとも1つとの間の変換を決定するステップは、前記ローカライザー画像のうちの1つにある点のセットを個人の前記スカウト画像のうちの1つにある対応する点のセットにマップする画像登録処理を実行するステップを含む、請求項1に記載のコンピュータ実施方法。
- 前記撮像スキャンは、CTスキャン装置によって実行されるコンピュータ断層撮影(CT)スキャンである、請求項1に記載のコンピュータ実施方法。
- 前記撮像スキャンおよび前記第1の個人の前記CTスキャンを実行するために使用される前記CTスキャン装置を表すパラメーターのセットを受信するステップと、
1人または複数の第2の個人に対応する放射線量吸収を予測するために事前に完了した複数のシミュレーションを含むシミュレーションライブラリにアクセスするステップと、
前記1人または複数の第2の個人に対応する前記放射線量吸収を予測するために事前に完了した複数のシミュレーションを評価するステップと、
前記受信したパラメーターのセットに指定された許容範囲尺度内で一致するパラメーターのセットおよび前記変形された数学ファントムを有する、前記シミュレーションライブラリ内の前記事前に完了した複数のシミュレーションのうちの1つについての、前記評価に基づいた、リアルタイム検索を提供するステップと、
前記シミュレーションライブラリ内で検索された前記事前に完了した複数のシミュレーションのうちの1つに関連付けられた放射線量吸収の前記予測を前記第1の個人によって吸収される放射線量の前記予測として決定するステップとをさらに含む、請求項3に記載のコンピュータ実施方法。 - 前記第1の個人によって吸収される放射線量の前記予測は、前記第1の個人の1つまたは複数の臓器に関する臓器吸収線量の予測を提供する、請求項4に記載のコンピュータ実施方法。
- 前記シミュレーションライブラリに前記パラメーターのセットおよび前記第1の個人によって吸収される放射線量の前記予測を記憶するステップをさらに含む、請求項4に記載のコンピュータ実施方法。
- 前記第1の個人の1つまたは複数のスカウト画像を受信するステップは、
前記CTスキャン装置を使用して、前記CTスキャンを実行することに先立って、前記第1の個人の二次元(2D)投影を捕獲するステップを含む、請求項3に記載のコンピュータ実施方法。 - 前記初期数学ファントムは、不均一有理スプライン(NURBs)のセットを含む、請求項1に記載のコンピュータ実施方法。
- 前記ローカライザー画像のうちの少なくとも1つを、前記第1の個人が受けた前記撮像スキャンに示されている領域中の前記初期数学ファントムと前記ローカライザー画像との決定された類似性に基づいて、選択するステップであって、前記変換は、前記選択されたローカライザー画像と前記第1の個人の前記スカウト画像のうちの少なくとも1つとの間で決定される、ステップをさらに含む、請求項1に記載のコンピュータ実施方法。
- 前記撮像スキャンおよび前記第1の個人の前記CTスキャンを実行するために使用される前記CTスキャン装置を表すパラメーターのセットを受信するステップと、
1人または複数の第2の個人に対応する放射線量吸収を予測するために事前に完了した複数のシミュレーションを含むシミュレーションライブラリにアクセスするステップと、
前記1人または複数の第2の個人に対応する前記放射線量吸収を予測するために事前に完了した複数のシミュレーションを評価するステップと、
指定された許容範囲尺度内で前記受信したパラメーターのセットおよび前記変形された数学ファントムに前記事前に完了した複数のシミュレーションの2つ以上が一致していると、前記評価に基づいて、決定した場合には、前記撮像スキャンを受けている前記第1の個人によって吸収される放射線量の前記予測を決定するために、前記2つ以上のシミュレーションの放射線量の前記予測を補間するステップと
指定された許容範囲尺度内で前記受信したパラメーターのセットおよび前記変形された数学ファントムに一致する少なくとも2つのシミュレーションを前記複数のシミュレーションが含んでいないと、前記評価に基づいて、決定した場合には、
前記変形された数学ファントムおよび前記受信したパラメーターのセットを使用して前記撮像スキャンのシミュレーションを実施するステップと、
前記撮像スキャンの実施の結果として前記個人によって吸収される放射線の量を、前記シミュレーションに基づいて、予測するステップと、
前記実施されたシミュレーションを前記シミュレーションライブラリに追加するステップと
をさらに含む、請求項3に記載のコンピュータ実施方法。 - プロセッサと、
第1の個人に対応する撮像モデルを作成するための演算を実行するように構成されるアプリケーションプログラムを記憶するメモリとを備え、前記演算は、
撮像スキャンを受ける前記第1の個人に関する初期数学ファントムを選択するステップであって、前記選択するステップは、前記第1の個人の年齢および性別に基づく、ステップと、
前記第1の個人の1つまたは複数のスカウト画像を受信するステップと、
前記初期数学ファントムにうまく一致する、体の幾何学的形状、サイズ、および位置を有するローカライザー画像の参照セットを複数の個人から得られた画像から選択するステップと、
前記ローカライザー画像のうちの少なくとも1つと前記第1の個人の前記スカウト画像のうちの少なくとも1つとの間の変換を決定するステップと、
前記変換に基づいて前記初期数学ファントムを変形させるステップであって、前記変換によりもたらされる変形された数学ファントムは、前記第1の個人のサイズ、形状、および臓器の位置によりよく一致する、ステップと
を含む、システム。 - プロセッサによって実行されると第1の個人に対応する撮像モデルを作成するための演算を実行する、1つまたは複数のアプリケーションプログラムを記憶する非一時的コンピュータ可読記憶媒体であって、前記演算は、
撮像スキャンを受ける前記第1の個人に関する初期数学ファントムを選択するステップであって、前記選択するステップは、前記第1の個人の年齢および性別に基づく、ステップと、
前記第1の個人の1つまたは複数のスカウト画像を受信するステップと、
前記初期数学ファントムにうまく一致する、体の幾何学的形状、サイズ、および位置を有するローカライザー画像の参照セットを複数の個人から得られた画像から選択するステップと、
前記ローカライザー画像のうちの少なくとも1つと前記第1の個人の前記スカウト画像のうちの少なくとも1つとの間の変換を決定するステップと、
前記変換に基づいて前記初期数学ファントムを変形させるステップであって、前記変換によりもたらされる変形された数学ファントムは、前記第1の個人のサイズ、形状、および臓器の位置によりよく一致する、ステップとを含む、非一時的コンピュータ可読記憶媒体。
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