JP7090922B2 - 矯正診断のための歯科画像分析方法及びこれを用いた装置 - Google Patents
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Description
Claims (12)
- 少なくとも画像取得モジュールと計測点検出モジュールを含むコンピューティング装置のプロセッサが矯正診断のために行う歯科画像分析方法であって、
前記コンピューティング装置のプロセッサが、歯科画像分析を行う各ステップとして、
画像取得モジュールによって、受診者の歯科画像を取得するステップと、
計測点検出モジュールによって、前記歯科画像から、矯正診断のための複数の計測点( landmark)を検出することである計測点のうちの少なくとも一部を検出するステップと、を含み、
前記計測点は、矯正診断のために必要とされる顔面骨格、歯及び顔の輪郭のうちの少なくとも一つの相対位置を指示する解剖学的基準点であり、前記計測点検出モジュールは、人工ニューラルネットワーク(artificial neural network)に基づいた機械学習モジュールを含み、
前記計測点のうちの少なくとも一部を検出するステップにおいて、前記計測点検出モジュールは、単一の畳み込みネットワーク(single convolution network)に基づいて、前記歯科画像から複数の前記計測点を同時に検出し、
前記計測点のうちの少なくとも一部を検出するステップは、
前記歯科画像を抽象化し、複数の前記計測点のそれぞれに対応する個々の解剖学的特徴の少なくとも一部が存在すると予測される複数の境界ボックス(boundary box)及び前記境界ボックスのそれぞれの中心座標を検出するステップと、
前記検出された前記境界ボックスのうちの少なくとも一部に対して、中心座標を前記計測点として決定するステップと、を含む方法。 - 蓄積された複数の比較歯科画像を含む学習データから前記機械学習モジュールを学習させるステップをさらに含み、
前記比較歯科画像は、専門医によって前記計測点が読み取られた他の受診者の歯科画像である、請求項1に記載の方法。 - 前記歯科画像は頭部X線規格写真(cephalogram)である、請求項1に記載の方法。
- 前記検出ステップは、
前記受信された歯科画像をリサイズ(resizing)するステップをさらに含み、
前記検出するステップは、前記リサイズされた歯科画像に基づいて行われる、請求項1に記載の方法。 - 前記検出ステップは、
前記境界ボックスのそれぞれに対して、前記個々の解剖学的特徴の存在確率を算出するステップをさらに含み、
前記決定するステップは、
一つの個々の解剖学的特徴に対して複数の前記境界ボックスが検出される場合、前記存在確率に基づいて前記一つの個々の解剖学的特徴に対応する複数の前記境界ボックスのうちのいずれかをフィルタリングするステップと、
前記フィルタリングされた前記境界ボックスの前記中心座標を前記計測点として決定するステップと、を含む、請求項1に記載の方法。 - 前記検出された計測点を、既設定された複数の計測点と対比して検出が欠落した計測点を識別するステップと、
標準計測点情報(standard landmark information)に基づいて、前記検出された計測点のうちの少なくとも一部に対応する標準計測点を有する標準歯科画像を探索するステップ-前記標準計測点情報は、複数の前記標準歯科画像及び複数の前記標準歯科画像のそれぞれに対して読み取られた複数の前記標準計測点に関する情報を含む-と、
前記探索された標準歯科画像及び前記探索された標準歯科画像の前記標準計測点を用いて、前記欠落した計測点の位置を決定するステップと、をさらに含む、請求項1に記載の方法。 - 前記標準計測点情報は、前記標準計測点のそれぞれと隣接して配置される複数の隣接計測点に関する情報をさらに含み、
前記標準歯科画像を探索するステップでは、前記隣接計測点に関する情報に基づいて、 前記検出された計測点のうち前記欠落した計測点と隣接して配置される複数の計測点に対応する前記標準計測点を有する前記標準歯科画像を探索する、請求項6に記載の方法。 - 前記標準歯科画像は、歯科画像原本から前記標準計測点の存在領域を抽出することにより生成され、前記標準計測点に関する情報は、前記標準歯科画像において前記標準計測点 の相対座標に関する情報を含み、
前記方法は、
前記歯科画像から前記検出された計測点の存在領域を抽出し、前記抽出された領域を、 前記標準歯科画像と同じスケールで正規化(normalizing)して、前記検出された計測点の相対座標を算出するステップをさらに含み、
前記標準歯科画像を探索するステップ及び前記欠落した計測点の位置を決定するステップは、前記検出された計測点の相対座標及び前記標準計測点の相対座標に基づいて行われる、請求項6に記載の方法。 - 診断者の選好計測点の情報を受信するステップと、
前記検出された計測点のうち前記選好計測点情報に対応する一部を強調して表示するス テップと、をさらに含む、請求項1に記載の方法。 - 前記検出された計測点に基づいてセファロ分析(cephalometric ana lysis)を行うことにより、矯正治療のための前記受診者の顔型を判断するステップ をさらに含む、請求項1に記載の方法。
- 請求項1ないし10のいずれか一項に記載の方法を行うためのプログラムが記録されたコンピュータ読み取り可能な記録媒体。
- 矯正診断のための歯科画像解析をサポートするコンピューティング装置であって、
受診者の歯科画像を取得する通信部と、
前記歯科画像から、矯正診断のための複数の計測点(landmark)のうちの少なくとも一部を検出する計測点検出モジュールを含むプロセッサと、を含み、
前記計測点は、矯正診断のために必要とされる顔面骨格、歯及び顔の輪郭のうちの少なくとも一つの相対位置を指示する解剖学的基準点であり、前記計測点検出モジュールは、人工ニューラルネットワーク(artificial neural network)に基づいた機械学習モジュールを含み、
前記計測点のうちの少なくとも一部を検出するステップにおいて、前記計測点検出モジュールは、単一の畳み込みネットワーク(single convolution network)に基づいて、前記歯科画像から複数の前記計測点を同時に検出し、
前記歯科画像を抽象化し、複数の前記計測点のそれぞれに対応する個々の解剖学的特徴の少なくとも一部が存在すると予測される複数の境界ボックス(boundary box)及び前記境界ボックスのそれぞれの中心座標を検出し、
前記検出された前記境界ボックスのうちの少なくとも一部に対して、中心座標を前記計測点として決定する装置。
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KR102522720B1 (ko) * | 2022-03-04 | 2023-04-25 | 이마고웍스 주식회사 | 3차원 구강 스캔 데이터에 3차원 치아 라이브러리 모델을 자동 정렬하는 방법 및 이를 컴퓨터에서 실행시키기 위한 프로그램이 기록된 컴퓨터로 읽을 수 있는 기록 매체 |
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KR102469288B1 (ko) * | 2022-05-13 | 2022-11-22 | 주식회사 쓰리디오엔에스 | 자동 치열 교정 계획 방법, 장치 및 프로그램 |
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CN111083922A (zh) | 2020-04-28 |
WO2020040349A1 (ko) | 2020-02-27 |
KR102099390B1 (ko) | 2020-04-09 |
EP3842005A1 (en) | 2021-06-30 |
CN111083922B (zh) | 2021-10-26 |
EP3842005A4 (en) | 2022-06-01 |
KR20200023703A (ko) | 2020-03-06 |
US10991094B2 (en) | 2021-04-27 |
US20200286223A1 (en) | 2020-09-10 |
JP2020534037A (ja) | 2020-11-26 |
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