JP2019534720A - 角度変位補償を用いて管サイズを測定するシステムおよび方法 - Google Patents
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Abstract
Description
m = (DCB - DCA) / (xB - xA)
また点Aと点Bを含んだ線のオフセット c は、以下のように定まる。
c = DCB - mxB
DCk = DCB - mxk - c ∀ k ∈ [A,B]
ここで DCk は、関心領域内の特定のDC量に対して、角度変位を補償するために加算が必要な量を表す。図21および図22は、照射プロファイル(の少なくとも関心領域内)から変位を除去する手法を視覚的に表現したものである。このように変位を除去することで、関心領域を本開示に係るシステムおよび方法で使用できるようになる。
DCk = DCB - mxk - c ∀ k ∈ [A,B]
定めた DCk を、素子 k における量 DC に足すことで、角度変位を除去できる。そして角度変位を補償した関心領域を使って、DCプロファイルを扱う上記の実施形態のいずれかにおいて使用できる。
さらに、誘起される角度変位量(δk)は、顎部角度(θ)と発光器照射強度(I)の直接の関数であると考えられ、以下のように表せる。
δk= fk(θ,I)
特定の顎部角度と発光器 110 からの特定の照射強度について、モデルによって角度変位量を以下のように描き出せる。
δk ∀ k ∈ [1,N]
こうした変位(歪み)の分布をフィードバックとして使い、発光器 110 の照射強度を更新できる。実際、必要な発光器照射強度は、上述したように変位量に直接比例すると考えられる。したがって発光器照射強度の更新用式は以下のように表せる。
ここで式中の βk,k' は、第k番目のセンサーにおける角度変位量に基づいた、k'番目の発光器において求められる発光強度の変分に対する比例定数である。
この発光器照射強度を更新するための式から、各発光器の照射強度の変分が大きくなるほど、歪みもまた大きくなることが理解でき、その逆もまた然りである。
Claims (10)
- 角度変位を補償する光学手術システムであって、
手術器具の作用端に配された、第一の表面上に設けられる複数個の発光器と、
前記手術器具の前記作用端に配された、前記第一の表面に対向する第二の表面上に設けられる複数個の光センサーと、
前記複数個の光センサーに結合する制御手段と
を含み、
前記第一の表面および前記第二の表面は、非平行な一対の顎部に設けられており、
前記制御手段が、
前記複数個の光センサーで受信される信号の持つ非搏動性成分から、照射パターンを決定することと、
前記照射パターン内の関心領域の第一の側における第一の点、および前記関心領域の第二の側における第二の点を決定することと、
前記関心領域の近傍に配された前記第一の点および前記第二の点を含んだ線形曲線を決定することと、
前記線形曲線を利用して、前記第一の点と前記第二の点とのあいだの前記関心領域から角度変位を除去することと
を行うように構成される
ことを特徴とする、システム。 - 前記関心領域が、前記照射パターン内の吸収プロファイルであってもよい、請求項1に記載のシステム。
- 前記第一の点および前記第二の点が、前記吸収プロファイルの両側に配される、請求項1に記載のシステム。
- 前記線形曲線が、傾斜 m およびオフセット c を含み、
前記制御手段が、前記線形曲線を利用して、以下の式を使って前記角度変位を除去するように構成され、
DCk = DCB - mxk - c
ここで DCk は第k番目の光センサーにおける前記関心領域に対する補償値であり、 DCB は前記第二の点における前記関心領域に対する未補償の値であり、 xk は前記手術器具の有する前記作用端の最遠位端から測定した第k番目の光センサーの位置である
ことを特徴とする、請求項1に記載のシステム。 - 前記制御手段が、
前記第一の点および前記第二の点の座標を使って傾斜を定め、かつ
前記傾斜と、前記第一の点または前記第二の点の座標とを使ってオフセットを定める
ことによって、前記第一の点および前記第二の点を含んだ線形曲線を定めるように構成される
ことを特徴とする、請求項1に記載のシステム。 - 前記制御手段が、複数の線形曲線を利用して、前記照射パターンの全体から角度変位を除去するように構成される、請求項1に記載のシステム。
- 前記非平行な一対の顎部が、対向する前記第一の表面と前記第二の表面とのあいだの角度を変更するように調節可能である、請求項1に記載のシステム。
- 角度変位を補償する光学手術システムであって、
手術器具の作用端に配された、第一の表面上に設けられる複数個の発光器と、
前記手術器具の前記作用端に配された、前記第一の表面に対向する第二の表面上に設けられる複数個の光センサーと、
前記複数個の発光器および前記複数個の光センサーに結合する制御手段と
を含み、
前記第一の表面および前記第二の表面は、非平行な一対の顎部に設けられ、対向する前記第一の表面と前記第二の表面のあいだに角度θがつけられており、
前記制御手段が、
前記複数個の発光器のうちの各発光器からの強度に応じて、非搏動性照射パターンをモデル化することと、
モデルに係る非搏動性照射パターンを、前記複数個の光センサーを用いて検出した非搏動性照射パターンと比較することと、
モデルに係る非搏動性照射パターンと、前記複数個の光センサーを用いて検出した非搏動性照射パターンとの比較に基づいて、角度変位が除去されるまで、前記複数個の発光器のうちの各発光器の強度を変化させることと
を行うように構成される
ことを特徴とする、システム。 - 前記非搏動性照射パターンが、下記式に基づいてモデル化でき、
DCko ∀ k ∈ [1,N] は第k番目の光センサーにおけるアーチファクトの無いDCの量であり、
Nは光センサーアレイにおける光センサーの個数であり、
δkは第k番目のセンサーにおいて誘発される角度変位の量である
ことを特徴とする、請求項8に記載のシステム。 - 前記複数個の発光器からの強度を、下記式に基づいて変化させ、
βk,k' は、第k番目の光センサーにおける角度変位の量に基づいた、第k'番目の発光器で求められる強度変化のあいだでの比例定数である
ことを特徴とする、請求項9に記載のシステム。
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PCT/US2017/048651 WO2018044722A1 (en) | 2016-08-30 | 2017-08-25 | System and method for determining vessel size with angular distortion compensation |
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US11399898B2 (en) | 2012-03-06 | 2022-08-02 | Briteseed, Llc | User interface for a system used to determine tissue or artifact characteristics |
WO2015148504A1 (en) | 2014-03-25 | 2015-10-01 | Briteseed Llc | Vessel detector and method of detection |
WO2016134330A1 (en) | 2015-02-19 | 2016-08-25 | Briteseed Llc | System and method for determining vessel size and/or edge |
US10820838B2 (en) | 2015-02-19 | 2020-11-03 | Briteseed, Llc | System for determining vessel size using light absorption |
WO2017062720A1 (en) | 2015-10-08 | 2017-04-13 | Briteseed Llc | System and method for determining vessel size |
WO2019050928A1 (en) | 2017-09-05 | 2019-03-14 | Briteseed, Llc | SYSTEM AND METHOD USED TO DETERMINE TISSUE AND / OR ARTIFACT CHARACTERISTICS |
WO2019126633A1 (en) | 2017-12-22 | 2019-06-27 | Briteseed, Llc | A compact system used to determine tissue or artifact characteristics |
US20210338260A1 (en) | 2018-08-20 | 2021-11-04 | Briteseed, Llc | A system and method with applied stimulation used to detect or differentiate tissue or artifact |
JP2022516528A (ja) * | 2018-12-30 | 2022-02-28 | ブライトシード・エルエルシー | 組織又はアーチファクトを検出又は区別するために使用されるシステム及び方法 |
EP4178420A1 (en) | 2020-07-08 | 2023-05-17 | Briteseed, LLC | System and method used to detect or differentiate tissue or an artifact |
US11950848B2 (en) * | 2020-08-10 | 2024-04-09 | Welch Allyn, Inc. | Fundus imaging for microvascular assessment |
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JP7058642B2 (ja) | 2022-04-22 |
ES2909724T3 (es) | 2022-05-10 |
US11589852B2 (en) | 2023-02-28 |
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US20190175158A1 (en) | 2019-06-13 |
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