JP2005537583A - 物体の単一カメラ追跡方法及び装置 - Google Patents
物体の単一カメラ追跡方法及び装置 Download PDFInfo
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Abstract
Description
Claims (46)
- 3次元空間での物体の位置及び方向を追跡する方法であって、
(a)物体上の複数のマーカーを調べる工程と、
(b)物体を画像化するのに使用されるイメージ装置をキャリブレーションする工程と、
(c)物体の位置及び方向データの第1セットを得る工程と、
(d)射影マーカー座標を得るべく、マーカーをイメージドメインに射影する工程と、
(e)イメージ装置を使ってイメージフレームデータセットを得る工程であって、前記イメージフレームデータセットは複数のマーカーのうちの少なくとも3つのマーカーに対するイメージデータから成るところの工程と、
(f)射影マーカー座標に対するイメージフレームデータセットを解析する工程と、
(g)上記工程(f)の結果が許容閾値範囲内になければ、物体の位置及び方向データの第1セットを調節する工程と、
(h) 上記工程(f)の結果が許容閾値範囲内にあれば、物体の位置及び方向データの第1セットを受け入れる工程と、
から成る方法。 - 請求項1に記載の方法であって、複数のマーカーを調べる工程は物体に特定の基準座標空間で実行される、ところの方法。
- 請求項2に記載の方法であって、調べたデータは物体上の複数のマーカー間の既知の相対位置を与える、ところの方法。
- 請求項1に記載の方法であって、イメージ装置をキャリブレーションする工程は、測定座標システムに関して、イメージ装置の座標システムを並進及び回転することにより実行される、ところの方法。
- 請求項4に記載の方法であって、測定座標システムは医療機器のシステムと同一中心で引き出される、ところの方法。
- 請求項4に記載の方法であって、キャリブレーションは構造の既知の位置及び寸法を画像化することにより実行される、ところの方法。
- 請求項1に記載の方法であって、物体の位置及び方向データの第1セットは予想された物体の位置及び方向の初期推定値から成る、ところの方法。
- 請求項1に記載の方法であって、マーカーを射影する工程は、先行イメージフレームからの位置及び方向の推定値を使用する、ところの方法。
- 請求項1に記載の方法であって、物体の位置及び方向データの第1セットは物体に関する6自由度(6DOF)データ値から成る、ところの方法。
- 請求項1に記載の方法であって、イメージフレームデータセットを得る工程は、イメージフレームデータセット内で少なくとも3個のマーカーが同定されるまで繰り返される、ところの方法。
- 請求項1に記載の方法であって、マーカー座標はイメージフレームデータセットのイメージ解析により引き出される、ところの方法。
- 請求項11に記載の方法であって、工程(f)は、工程(d)の射影マーカー座標と工程(e)から引き出されたマーカー座標の第2セットとの間の差分ベクトルを形成することから成る、ところの方法。
- 請求項12に記載の方法であって、差分ベクトルは許容可能な閾値と比較される、ところの方法。
- 請求項11に記載の方法であって、工程(g)は、差分ベクトルの長さを減少させるような方法で、差分ベクトルを使う物体の6自由度推定値を調節することから成る、ところの方法。
- 請求項1に記載の方法であって、物体の位置及び方向データの第1セットは物体の位置及び方向データの先行セットから成る、ところの方法。
- 請求項1に記載の方法であって、さらに、物体と物体に固定されたデバイスとの間の相対位置を調べる工程を含む方法。
- 請求項2に記載の方法であって、物体に超音波プローブが取り付けられ、超音波プローブにより画像化された構造に対して位置が決定される、ところの方法。
- 請求項17に記載の方法であって、超音波プローブにより画像化された構造は測定座標空間で並進及び回転される、ところの方法。
- 請求項18に記載の方法であって、並進を実行するために、マッピング情報が使用される、ところの方法。
- 請求項19に記載の方法であって、マッピング情報はシステム座標空間で超音波プローブをキャリブレーションすることにより得られる、ところの方法。
- 請求項19に記載の方法であって、マッピング情報は超音波プローブを使って既知の構造を画像化することにより得られる、ところの方法。
- 請求項17に記載の方法であって、超音波プローブにより生成されたボクセルは物体の基準座標へマッピングされる、ところの方法。
- 請求項2に記載の方法であって、たったひとつのイメージ装置が物体の位置及び方向を追跡するのに使用される、ところの方法。
- 請求項2に記載の方法であって、工程(d)の座標は画素座標から成る、ところの方法。
- 請求項2に記載の方法であって、物体はマーカーブロックから成る、ところの方法。
- 請求項2に記載の方法であって、物体の位置及び方向データの第1セットを受け取るよう工程(h)が実行されるまで、工程(g)が繰り返される、ところの方法。
- 請求項2に記載の方法であって、先端を有する手術器具が物体に取り付けられ、先端位置が物体の位置及び方向に基づいて計算される、ところの方法。
- 請求項27に記載の方法であって、先端は構造全体にわたってトレースされ、構造はトレース中に先端位置に基づいてプロファイルされる、ところの方法。
- 請求項28に記載の方法であって、構造は患者の体から成る、ところの方法。
- 3次元空間でのデバイス上の点の位置をデジタル化するための方法であって、
デバイス上に複数の基準点を定義する工程と、
デバイスに関して固定された局所基準座標システムにおける、点及び複数の基準点の座標を光学的に決定する工程と、
複数の基準点の第1サブセットを検出する工程と、
複数の基準点の第1サブセットの測定座標システムにおける座標を決定する工程と、
測定座標システムにおける、点の第1座標を決定するべく幾何学変換を実行する工程と、
から成る方法。 - 請求項30に記載の方法であって、さらに、複数の基準点に複数のマーカーを配置する工程を含む方法。
- 請求項30に記載の方法であって、デバイスはその上に点が存在する手術器具の先端から成る、ところの方法。
- 請求項32に記載の方法であって、手術器具の先端はバイオプシー針の先端から成る、ところの方法。
- 請求項30に記載の方法であって、複数の基準点は物体上のマーカーから成る、ところの方法。
- 請求項30に記載の方法であって、第1サブセットは少なくとも3つのマーカーから成る、ところの方法。
- 請求項28に記載の方法であって、点の位置をデジタル化するのにひとつのイメージ装置が使用される、ところの方法。
- 患者を3次元プロファイルするための方法であって、
患者の体表面の経路に沿ってポインタデバイスの先端をトレースする工程と、
ポインタデバイスの先端に関してマーカー位置のセットの測定座標を光学的に検出する工程と、
測定座標システムにおけるポインタデバイス先端の座標を決定する工程と、
患者の体表面の経路に沿ってトレースされるに従い、ポインタデバイスの先端の座標を繰り返して更新しかつ保存する工程と、
から成る方法。 - 請求項37に記載の方法であって、マーカー位置のセットが単一のカメラにより光学的に検出される、ところの方法。
- 請求項37に記載の方法であって、マーカー位置のセットがマーカーブロック上に配置される、ところの方法。
- 患者の体における位置に関する手術器具の位置及び方向を決定する方法であって、
患者の体内領域のイメージデータを捕捉するための画像化手法を実行する工程と、
イメージ座標システムにおける患者の体内の位置を決定する工程と、
測定座標システムにおける手術器具の位置及び方向を光学的に決定する工程と、
イメージ座標システムにおける手術器具の位置及び方向を決定する工程と、
から成る方法。 - 請求項40に記載の方法であって、画像化手法は、CT法、MRI法、PET法から成る集合から選択される、ところの方法。
- 複数のマーカー及び手術器具が固体デバイス上に固定されるところの請求項40に記載の方法であって、測定座標システムにおける手術器具の位置及び方向を決定する工程は、
少なくともひとつのカメラでマーカーの少なくともサブセットを見る工程と、
マーカーの少なくともサブセットのイメージデータを生成する工程と、
マーカーの少なくともサブセットのイメージデータから、手術器具の測定座標システムにおける位置及び方向を決定する工程と、
から成るところの方法。 - 請求項40に記載の方法であって、さらに、
患者に画像化手法を実行する工程と測定座標システムにおける手術器具の位置及び方向を決定する工程との間に、患者を移動する工程と、
手術器具の位置及び方向を決定する前に、画像化手法を実行する工程の完了時に決定された患者の位置と一致させるように、患者を再配置する工程と、
から成る方法。 - 請求項40に記載の方法であって、さらに、
患者体内の生理的活動をモニターする工程と、
生理的活動のモニターのフィードバックを患者に与える工程と、
から成る方法。 - 請求項40に記載の方法であって、画像化手法はリアルタイムでイメージを捕捉するために実行される、ところの方法。
- 物体の位置及び方向の単一カメラ追跡方法であって、
物体上のマーカーのセットを調べる工程と、
物体の位置及び方向の推定値を得る工程と、
実際の座標情報を生成するイメージフレームを得るべく物体を画像化するのにひとつのカメラを使用する工程であって、イメージフレーム内の少なくとも3つのマーカーは同定可能である、ところの工程と、
実際の座標情報を解析する工程と、
実際の座標情報の解析結果が許容閾値範囲内にあれば、物体の位置及び方向の推定値を受け入れる工程と、
から成る方法。
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US10/234,658 US6973202B2 (en) | 1998-10-23 | 2002-09-03 | Single-camera tracking of an object |
PCT/US2003/027552 WO2004023783A2 (en) | 2002-09-03 | 2003-09-03 | Single-camera tracking of an object |
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EP (1) | EP1535457A4 (ja) |
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- 2003-09-03 JP JP2004534486A patent/JP2005537583A/ja active Pending
- 2003-09-03 EP EP03749365A patent/EP1535457A4/en not_active Withdrawn
- 2003-09-03 AU AU2003268401A patent/AU2003268401A1/en not_active Abandoned
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2005
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Also Published As
Publication number | Publication date |
---|---|
WO2004023783A2 (en) | 2004-03-18 |
US20050201613A1 (en) | 2005-09-15 |
EP1535457A4 (en) | 2009-04-01 |
AU2003268401A8 (en) | 2004-03-29 |
EP1535457A2 (en) | 2005-06-01 |
US7567697B2 (en) | 2009-07-28 |
WO2004023783A3 (en) | 2004-05-27 |
US20030063292A1 (en) | 2003-04-03 |
AU2003268401A1 (en) | 2004-03-29 |
US6973202B2 (en) | 2005-12-06 |
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