JP2011104370A - 非線形走査による手術標的組織のイメージング - Google Patents
非線形走査による手術標的組織のイメージング Download PDFInfo
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Abstract
【解決手段】眼の手術を誘導するための方法は、イメージングシステムに対して眼を位置決めするステップ110と、第1の弧に沿った点の第1の組における眼の標的領域の深さを判定することによって、第1の走査データを生成するステップ120と、第2の弧に沿った点の第2の組における眼の標的領域の深さを判定することによって、第2の走査データを生成するステップ130と、第1及び第2の走査データに基づいて、標的領域パラメータを判定するステップ140と、判定された標的領域パラメータに基づいて、1つ以上の手術位置パラメータを調整するステップ150とを有する。
【選択図】図3
Description
TRjは、標的領域パラメータTR1及びTR2を表し、Aiは、振幅を表し、Fiは、位相を表し、これらは、走査特徴の特定の具体例である。上述の特定のケースでは、標的領域パラメータTRiが標的パターン40の参照フレーム内の標的領域中心のデカルト座標Cx及びCyであるとき、上の式(1)は、以下のように書き換えられる。
Cy=Cy(A1,A2,F1,F2) (2)
幾つかの具体例では、中心座標Cx及びCyを判定するために、1つの走査円又はループだけで十分であることがある。
Cy=Cy(A1,F1) (3)
他の実施の形態では、標的領域パラメータTR1及びTR2は、走査ループ中心241−Cに対する標的中心50−Cのオフセットの方向及び大きさであり、これらは、例えば、動径座標(radial coordinates)で表現され、これも、位相F1及びF2及び振幅A1、A2走査特徴から判定できる。
Cy=Cy(A1,F1,R(A1,F1)) (4)
第1の走査又は深さデータ241−D1…241−Dnの正弦波的な挙動は、1つ以上の原点を有することがある。上述した標的パターン中心40−C及び標的領域中心50−Cのオフセットは、基本的な原点の1つである。但し、他の要素も貢献することがある。これらの要素は、眼の光軸の可能な傾斜、純粋な球体の形状からの偏り、例えば、楕円形状を有する標的領域等を含む。
SPj=SPj(Ai,Fi)
OPj=OPj(Ai,Fi) (5)
式(4)は、方法の中間ステップとして形状パラメータSPiが判定されることを示しているが、式(5)は、形状パラメータSPjまでもが走査特徴から判定されることを強調している。なお、標的領域パラメータTRjの添字が走査特徴Ai及びFiとは異なっていることは、通常、TRjパラメータの数が、走査特徴Ai及びFiの数とは異なっていてもよいことを示している。典型的な実施の形態では、全ての必要な標的領域パラメータTRjを判定するために十分大きな数の走査特徴Ai及びFiを抽出する。
Cy=Cy(A1,A2,F1,F2,R(Ai,Fi)) (4’)
Cx=Cx(A1,A2,F1,F2)
Cy=Cy(A1,A2,F1,F2)
R=R(A1,A2,F1,F2) (5’)
また、これらの式は、標的領域パラメータTRjを判定するために必要な最小数より多くの走査特徴を抽出して使用すること、この具体例では、必要な最小数である3個に代えて、4個を使用することが、最終的な位置パラメータPPjの忠実度を高める一手法であることを示している。
(b)走査弧に沿って水晶体標的領域の位置データを判定する−ステップ420
(c)位置データに基づいて水晶体位置パラメータを判定する−ステップ430
(d)判定した水晶体位置パラメータに基づいて手術位置パラメータを調整する−ステップ440
(e)眼の手術の間、ステップ(b)〜(d)を繰り返し、手術位置パラメータを再調整する−ステップ450
方法400は、例えば、水晶体標的が前部水晶体表面、瞳孔によって定義された前面、水晶体標的領域及び後部水晶体表面の1つである手術において使用することができる。
Claims (16)
- 眼をイメージングする方法において、
イメージングシステムに対して眼を位置決めするステップと、
第1の弧に沿った点の第1の組における眼の標的領域の深さを判定することによって、第1の走査データを生成するステップと、
第2の弧に沿った点の第2の組における眼の標的領域の深さを判定することによって、第2の走査データを生成するステップと、
前記第1及び第2の走査データに基づいて、標的領域パラメータを判定するステップとを有する方法。 - 前記深さを判定するステップは、
光干渉断層法(OCT)、超音波ベースの方法、顕微鏡的方法及び干渉に基づく方法のうちの少なくとも1つによって前記眼の標的領域をイメージングするステップを含む請求項1記載の方法。 - 前記眼の標的領域は、
角膜標的領域、前部水晶体表面、後部水晶体表面、水晶体標的領域、眼の層、及び瞳孔によって定義された表面のうちの1つである請求項1記載の方法。 - 前記第1の弧及び前記第2の弧の少なくとも1つは、閉じたループの少なくとも一部を形成する請求項1記載の方法。
- 前記第1の弧は、第1の円筒が眼の標的領域に交わる第1の交線の一部であり、
前記第2の弧は、第2の円筒が眼の標的領域に交わる第2の交線の一部である請求項1記載の方法。 - 第1の走査データの第1の振幅及び第1の位相を抽出するステップと、
第2の走査データの第2の振幅及び第2の位相を抽出するステップとを有する請求項1記載の方法。 - 前記標的領域パラメータを判定するステップは、
前記第1の振幅、前記第1の位相、前記第2の振幅及び前記第2の位相に基づいて前記標的領域の中心の位置パラメータを判定するステップを含む請求項6記載の方法。 - 前記標的領域パラメータを判定するステップは、
前記第1の振幅、前記第1の位相、前記第2の振幅及び前記第2の位相に基づいて前記標的領域のオブジェクト形状パラメータを判定するステップを含む請求項6記載の方法。 - 前記標的領域パラメータを判定するステップは、
前記第1の振幅、前記第1の位相、前記第2の振幅及び前記第2の位相に基づいてオブジェクト向きパラメータを判定するステップを含む請求項6記載の方法。 - 前記標的領域パラメータを判定するステップは、
前記標的領域の位置及び参照点に関する位置パラメータ更新を判定するステップを含む請求項6記載の方法。 - 前記眼の標的領域は、眼の水晶体の領域であり、
前記標的領域パラメータは、
水晶体の形状パラメータ、
水晶体の傾斜パラメータ、及び
水晶体の位置パラメータを含む請求項1記載の方法。 - オブジェクトをイメージングする方法において、
イメージングシステムに対して、1つ以上の形状パラメータによって形状を記述できるオブジェクトを位置決めするステップと、
弧に沿った一組の点における前記オブジェクトの座標を判定することによって走査データを生成するステップと、
前記走査データに基づいて、オブジェクト形状パラメータ及びオブジェクト位置パラメータを判定するステップとを有する方法。 - 前記オブジェクトは、眼の前部水晶体表面層であり、
前記オブジェクトの座標は、Z座標であり、
前記オブジェクト形状パラメータは、前部水晶体表面層の半径であり、
前記オブジェクト位置パラメータは、前部水晶体表面の中心の座標である請求項12記載の方法。 - 前記オブジェクト位置パラメータを判定するステップは、
光干渉断層法(OCT)、超音波ベースの方法、顕微鏡的方法及び干渉に基づく方法のうちの少なくとも1つによってオブジェクトをイメージングするステップを含む請求項12記載の方法。 - 前記オブジェクト形状パラメータ及び前記オブジェクト位置パラメータを判定するステップは、
補助弧に沿った点の補助的な組における前記オブジェクトの座標を判定することによって、補助走査データを生成するステップと、
前記走査データ及び前記補助走査データから前記オブジェクト形状パラメータ及び前記オブジェクト位置パラメータを判定するステップとを含む請求項12記載の方法。 - 前記オブジェクト形状パラメータ及び前記オブジェクト位置パラメータを判定するステップは、
前記走査データの振幅及び位相を抽出するステップと、
前記抽出された振幅及び位相に基づいて前記オブジェクト層の中心を判定するステップとを含む請求項12記載の方法。
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CN102612342A (zh) | 2012-07-25 |
ES2593404T3 (es) | 2016-12-09 |
MX338814B (es) | 2016-05-03 |
AU2010319285A1 (en) | 2012-06-21 |
RU2575967C2 (ru) | 2016-02-27 |
CA2778264A1 (en) | 2011-05-19 |
CA3021848A1 (en) | 2011-05-19 |
US20170007447A1 (en) | 2017-01-12 |
EP2322083B1 (en) | 2016-07-27 |
JP5763327B2 (ja) | 2015-08-12 |
US9492322B2 (en) | 2016-11-15 |
CA3021848C (en) | 2021-07-27 |
EP2322083A1 (en) | 2011-05-18 |
WO2011060356A1 (en) | 2011-05-19 |
EP3087911B1 (en) | 2019-09-25 |
KR101735573B1 (ko) | 2017-05-15 |
EP3087911A1 (en) | 2016-11-02 |
US10828198B2 (en) | 2020-11-10 |
MX351756B (es) | 2017-10-27 |
MX2012005234A (es) | 2012-08-15 |
US20110118609A1 (en) | 2011-05-19 |
KR20120096512A (ko) | 2012-08-30 |
AU2010319285B2 (en) | 2015-01-22 |
CA2778264C (en) | 2018-12-11 |
BR112012011522A2 (pt) | 2016-06-28 |
ES2752189T3 (es) | 2020-04-03 |
CN102612342B (zh) | 2015-03-11 |
RU2012124989A (ru) | 2013-12-27 |
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