JP2018149380A - 撮像プローブ用の走査機構 - Google Patents
撮像プローブ用の走査機構 Download PDFInfo
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- A61B5/0035—Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room adapted for acquisition of images from more than one imaging mode, e.g. combining MRI and optical tomography
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- A61B1/05—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
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Abstract
Description
本出願は、参照することにより全体的に本書に盛り込まれた英題が「IMAGING PROBE」である2007年1月19日に出願された米国仮特許出願第60/881,169号に関連し、その優先権の利益を享受する。
血管内超音波法のためのカテーテルベースのシステムがYockによって説明されており(米国特許4794931)、血管内の構造の高分解能の撮像を提供する。このようなシステムは、中の長いトルクケーブルの遠位端の近くに超音波トランスデューサを設けた外側シースを具えている。モータがトルクケーブル及び超音波トランスデューサアッセンブリを回転させると、血管といった解剖学的構造の2次元断面画像を形成し得る。カテーテル又はトルクケーブル及び超音波トランスデューサアッセンブリの回転運動と組み合わせた真っ直ぐな平行移動により、カテーテルの長さ方向に沿った一連の2次元画像を取得し得る。
a)遠位及び近位端部及び細長い中間部を有して長手軸を有する細長い中空のシャフトであって、エネルギビームを放射し、前記管腔及び体腔の内面又は前記体の外面から反射される反射エネルギ信号を受信するための撮像アッセンブリが、前記近位端部から離れて前記細長い中空のシャフトの中に配置され、前記撮像アッセンブリが撮像コンジットの第1の端部に接続され、前記撮像コンジットが前記細長い中空のシャフトを通って延びて当該コンジットの第2の端部で前記近位端部を介して画像処理システムに接続されており、前記撮像コンジットは前記撮像アッセンブリにエネルギを送出するよう構成されている細長い中空のシャフトと;
b)ある角速度で前記長手軸を中心に前記撮像コンジット及び前記撮像アッセンブリに回転運動を与えるための回転駆動機構であって、前記角速度を変えるための調節手段を有する回転駆動機構と;
c)前記撮像アッセンブリの前方視又は側視性能を提供するために前記長手軸に対して可変角度で前記細長い中空のシャフトの外の経路に沿って前記エネルギビームを送出するよう構成された可動部材を有する走査機構を具える前記撮像アッセンブリであって、前記可動部材が前記可変角度が前記角速度の関数となるように取り付けられており、前記走査機構が前記反射エネルギ信号を受信して前記撮像コンジットを介して前記画像処理システムに送出するよう構成された前記撮像アッセンブリと;
d)前記回転駆動機構及び前記画像処理システムに接続されたコントローラと;
e)受信した前記エネルギ信号を処理して前記管腔又は体腔の内面又は隣接構造、又は前記体の外面又は体の隣接構造の画像を生成するよう構成された前記画像処理システムと;
f)前記画像処理システムに接続されて前記画像を表示する表示手段と;
を具えた撮像プローブを提供する。
a)遠位及び近位端部及び細長い中間部を有して長手軸を有する細長い中空のシャフトであって、エネルギビームを放射し、前記管腔及び体腔の内面又は隣接構造、又は体の外面又は隣接構造から反射される反射エネルギ信号を受信するための撮像アッセンブリが、前記近位端部から離れて前記細長い中空のシャフトの中に配置され、前記撮像アッセンブリが撮像コンジットの第1の端部に接続され、前記撮像コンジットが前記細長い中空のシャフトを通って延びて当該コンジットの第2の端部で前記近位端部を介して画像処理システムに接続されており、前記撮像コンジットは前記撮像アッセンブリにエネルギを送出するよう構成されている細長い中空のシャフトと;
b)予め選択した角速度で前記長手軸を中心に前記撮像コンジット及び前記撮像アッセンブリに回転運動を与えるための回転駆動機構であって、前記予め選択した角速度を変えるための調節手段を有する回転駆動機構と;
c)前記撮像アッセンブリの前方視又は側視性能を提供するために前記長手軸に対して可変角度で前記細長い中空のシャフトの外の経路に沿って前記エネルギビームを送出するよう構成された可動部材を有する走査機構を具える前記撮像アッセンブリであって、前記可動部材が当該可動部材の周辺エッジに取り付けられた磁石を有しており、前記走査機構が電磁石を有しており、この電磁石が前記回動可能に取り付けられた反射部材から前記磁石が前記電磁石と相互作用するよう十分に近接した間隔で設けられており、前記電磁石が電源に接続され、前記可動部材は前記可変角度が前記電磁石に印加される電力の関数となるように取り付けられており、前記走査機構が前記反射エネルギ信号を受信して前記撮像コンジットを介して前記画像処理システムに送出するよう構成されている前記撮像アッセンブリと;
d)前記回転駆動機構、前記電磁石の電源及び前記画像処理システムに接続され、前記受信したエネルギ信号を処理して前記管腔及び体腔の内面又は隣接構造、又は体の外面又は隣接構造の画像を生成するよう構成されたコントローラと;
e)前記画像処理システムに接続され前記画像を表示する表示手段と;
を具えた撮像プローブを提供する。
撮像角度を変えるいくつかの実施例を上述したが、取得した撮像データに関する撮像角度及び回転角度を推定、推測、(直接的又は間接的に)測定又はそうでなければ取得することが有益である。撮像データの各ピクセル又はサンプルを、1)回転角度と称される回転軸の周りの角度、2)撮像角度と称される回転軸からの角度、及び任意に3)撮像レシーバから又はエネルギ偏向部品からといった、撮像アッセンブリの中又はその近くの基準点からの距離に、関連付けることが可能である。これらの2つの角度及び光学的距離の測定を使用して、3次元の撮像対象/組織の再構成に役立つ。
Claims (25)
- 撮像プローブであって、
中空のシャフトと、
前記中空のシャフトの中に少なくとも部分的に配置された撮像コンジットと、
前記撮像コンジットの近位端から離れた位置で前記撮像コンジットに取り付けられた撮像アッセンブリであって、傾斜可能な部材を具えた撮像アッセンブリと、
を具えており、
前記撮像アッセンブリが、エネルギビームを放射するよう構成されたエネルギ放射装置を具えており、前記エネルギ放射装置が、前記エネルギビームに関連する撮像角度が前記傾斜可能な部材の傾斜角度に依存するように配置されており、
前記撮像アッセンブリが、前記傾斜可能な部材の傾斜角度が前記撮像角度を走査するために制御可能に構成されており、
前記傾斜可能な部材が、各凹部内に受容された一対の回動ピンを具える低摩擦回動機構によって回動可能に支持されていることを特徴とする撮像プローブ。 - 請求項1に記載の撮像プローブにおいて、
前記エネルギ放射装置が、前記傾斜可能な部材によって支持されていることを特徴とする撮像プローブ。 - 請求項2に記載の撮像プローブにおいて、
前記低摩擦回動機構が、電気エネルギを送出するため且つ前記エネルギ放射装置からエネルギ信号を受信するために前記エネルギ放射装置への導電経路を与えるよう構成されていることを特徴とする撮像プローブ。 - 請求項3に記載の撮像プローブにおいて、
前記低摩擦回動機構の各回動ピンが、前記各回動ピン内で絶縁された各導電経路に導通する導電性の先端を具えており、
各凹部が絶縁領域及び導電領域を具えており、
各導電領域が、各回動ピンの先端に接触するよう構成されていることを特徴とする撮像プローブ。 - 請求項2に記載の撮像プローブにおいて、
前記撮像アッセンブリが、さらに、前記エネルギ放射装置に導通する一対の柔軟性のある導電体を具えており、
前記一対の柔軟性のある導電体が、前記傾斜可能な部材を好適な方向から逸らす復元機構を与えるよう構成されていることを特徴とする撮像プローブ。 - 請求項1乃至5のいずれか一項に記載の撮像プローブにおいて、
前記傾斜可能な部材が前記凹部を具えており、
前記傾斜可能な部材が前記回動ピンによって回転するよう支持されていることを特徴とする撮像プローブ。 - 請求項1乃至4のいずれか一項に記載の撮像プローブにおいて、
前記撮像コンジットが前記中空のシャフトの中で回転可能であり、
前記撮像プローブが、さらに、前記傾斜可能な部材を好適な方向から逸らすために前記傾斜可能な部材に力を加えるよう構成された復元機構を具えており、
前記低摩擦回動機構が、前記撮像コンジットの角速度を調節することによって撮像角度が制御されるように構成されていることを特徴とする撮像プローブ。 - 請求項1乃至7のいずれか一項に記載の撮像プローブにおいて、
前記エネルギ放射装置が超音波トランスデューサであることを特徴とする撮像プローブ。 - 医療用プローブであって、
中空のシャフトと、
前記中空のシャフトの中に少なくとも部分的に配置されたコンジットと、
前記コンジットの近位端から離れた位置で前記コンジットに結合された走査アッセンブリと、
を具えており、
前記走査アッセンブリが、傾斜可能な部材を具えており、
前記走査アッセンブリが、エネルギビームを放射するよう構成されたエネルギ放射装置を具えており、前記エネルギ放射装置が、前記エネルギビームに関連するビーム角度が前記傾斜可能な部材の傾斜角度に依存するように配置されており、
前記走査アッセンブリが、前記傾斜可能な部材の傾斜角度が前記ビーム角度を走査するために前記走査アッセンブリの長手軸に対して制御可能に構成されており、
前記傾斜可能な部材が、各凹部に受容された一対の回動ピンを具える低摩擦回動機構によって回動可能に支持されていることを特徴とする医療用プローブ。 - 請求項9に記載の医療用プローブにおいて、
前記エネルギ放射装置が前記傾斜可能な部材によって支持されていることを特徴とする医療用プローブ。 - 請求項10に記載の医療用プローブにおいて、
前記低摩擦回動機構が、前記エネルギ放射装置に電気エネルギを送出するために前記エネルギ放射装置への導電経路を与えるよう構成されていることを特徴とする医療用プローブ。 - 請求項11に記載の医療用プローブにおいて、
前記低摩擦回動機構の各回動ピンが、前記各回動ピン内で絶縁された各導電経路に導通する導電性の先端を具えており、
各凹部が、絶縁領域及び導電領域を具えており、
各導電領域が、各回動ピンの先端に接触するよう構成されていることを特徴とする医療用プローブ。 - 請求項10に記載の医療用プローブにおいて、
前記走査アッセンブリが、さらに、前記エネルギ放射装置に導通する一対の柔軟性のある導電体を具えており、
前記一対の柔軟性のある導電体が、前記傾斜可能な部材を好適な方向から逸らす復元機構を与えるよう構成されていることを特徴とする医療用プローブ。 - 請求項9乃至13のいずれか一項に記載の医療用プローブにおいて、
前記傾斜可能な部材が前記凹部を具えており、
前記傾斜可能な部材が前記回動ピンによって回転するよう支持されていることを特徴とする医療用プローブ。 - 請求項9乃至12のいずれか一項に記載の医療用プローブにおいて、
前記コンジットが前記中空のシャフトの中で回転可能であり、
前記医療用プローブが、さらに、前記傾斜可能な部材を好適な方向から逸らすために前記傾斜可能な部材に力を加えるよう構成された復元機構を具えており、
前記低摩擦回動機構が、前記コンジットの角速度を調節することによってビーム角度が制御されるように構成されていることを特徴とする医療用プローブ。 - 請求項9乃至15のいずれか一項に記載の医療用プローブにおいて、
前記エネルギ放射装置が超音波トランスデューサであることを特徴とする医療用プローブ。 - 回転運動の間にエネルギビームを向けるための走査装置であって、
支持部と、
前記支持部に回動するよう結合された傾斜可能な部材と、
エネルギビームを放射するよう構成されたエネルギ放射装置と、
を具えており、
前記エネルギ放射装置が、前記エネルギビームに関連するビーム角度が前記傾斜可能な部材の傾斜角度に依存するように配置されており、
前記傾斜可能な部材の傾斜角度が前記ビーム角度を走査するために制御可能であり、
前記傾斜可能な部材が、各凹部に受容された一対の回動ピンを具える低摩擦回動機構によって回動可能に支持されていることを特徴とする走査装置。 - 請求項17に記載の走査装置において、
前記エネルギ放射装置が前記傾斜可能な部材によって支持されていることを特徴とする走査装置。 - 請求項18に記載の走査装置において、
前記低摩擦回動機構が、前記エネルギ放射装置に電気エネルギを送出するため且つ前記エネルギ放射装置からエネルギ信号を受信するために前記エネルギ放射装置への導電経路を与えるよう構成されていることを特徴とする走査装置。 - 請求項19に記載の走査装置において、
前記低摩擦回動機構の各回動ピンが、前記各回動ピン内で絶縁された各導電経路に導通する導電性の先端を具えており、
各凹部が、絶縁領域及び導電領域を具えており、
各導電領域が、各回動ピンの先端に接触するよう構成されていることを特徴とする走査装置。 - 請求項18に記載の走査装置において、
前記支持部が、さらに、前記エネルギ放射装置に導通する一対の柔軟性のある導電体を具えており、
前記一対の柔軟性のある導電体が、前記傾斜可能な部材を好適な方向から逸らす復元機構を与えるよう構成されていることを特徴とする走査装置。 - 請求項17乃至21のいずれか一項に記載の走査装置において、
前記傾斜可能な部材が前記凹部を具えており、
前記傾斜可能な部材が前記回動ピンによって回転するよう支持されていることを特徴とする走査装置。 - 請求項17乃至20のいずれか一項に記載の走査装置において、
前記支持部が回転部品であり、前記回転部品が回転軸を中心として回転可能であり、
前記走査装置が、さらに、前記傾斜可能な部材を好適な方向から逸らすために前記傾斜可能な部材に力を加えるよう構成された復元機構を具えており、
前記低摩擦回動機構が、前記回転部品の角速度を調節することによってビーム角度が制御されるように構成されていることを特徴とする走査装置。 - 請求項17乃至23のいずれか一項に記載の走査装置において、
前記傾斜可能な部材が磁石であり、
前記支持部が、前記磁石が前記電磁石と相互作用するよう前記傾斜可能な部材に十分に近接した間隔を空けた電磁石を具えており、前記電磁石が電磁石用の電源に接続可能であり、前記傾斜可能な部材が前記ビーム角度が前記電磁石に印加される電力の関数となるように取り付けられていることを特徴とする走査装置。 - 請求項17乃至24のいずれか一項に記載の走査装置において、
前記エネルギ放射装置が超音波トランスデューサであることを特徴とする走査装置。
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