JP2016518170A5 - - Google Patents
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- JP2016518170A5 JP2016518170A5 JP2016503763A JP2016503763A JP2016518170A5 JP 2016518170 A5 JP2016518170 A5 JP 2016518170A5 JP 2016503763 A JP2016503763 A JP 2016503763A JP 2016503763 A JP2016503763 A JP 2016503763A JP 2016518170 A5 JP2016518170 A5 JP 2016518170A5
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- bone
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- dimensional image
- image
- structural parameters
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- 210000000988 Bone and Bones Anatomy 0.000 claims description 17
- 239000007943 implant Substances 0.000 claims description 2
Description
骨プラントが予定されている位置に骨の3次元画像が提供される場合、骨の構造パラメータを決定するために、3次元画像が、骨の構造パラメータを決定するための2次元画像として処理されるべき平面上に投影されるか、又は3次元画像として処理される。 If a three-dimensional image of bone is provided at the location where the bone plant is planned, the three-dimensional image is processed as a two-dimensional image to determine the bone structural parameters to determine the bone structural parameters. Projected onto a plane to be processed or processed as a three-dimensional image.
好ましい実施態様においては、前記計算装置が、骨の構造パラメータを、デジタル化された2次元又は3次元画像を処理するために一連の以下の工程を実施して決定する。a)2次元又は3次元画像の関心領域における2次元又は3次元画像の各画素のグレーレベルh(O)を検索する工程;b)前記グレーレベルh(O)が検索された画素の周囲の距離rにおける画素のセットを選択する工程;c)前記画素のセットのグレーレベルh(r)を検索する工程;d)式:V(r)=[h(r)・h(O)]2を用いて前記グレーレベルh(r)と前記グレーレベルh(O)との相違を表す関数V(r)を計算する工程; e)よこ軸を前記距離rとし、たて軸を前記関数V(r)とする対数スケールで得られる、前記V(r)に関連づけられた曲線をたどる工程;及びf)前記曲線の勾配を前記骨の構造パラメータαとして決定する工程。 In a preferred embodiment, the computing device determines the structural parameters of the bone, and a series of the following steps for processing the digitized 2-dimensional or 3-dimensional images were. a) searching for the gray level h (O) of each pixel of the 2D or 3D image in the region of interest of the 2D or 3D image ; b) surrounding the pixel for which the gray level h (O) was searched step selects the cell Tsu City of pixels at a distance r; c) step to find the gray level h (r) of a set of pre-outs containing; d) formula: V (r) = [h (r) · h ( O)] step calculates the function V (r) representing a difference between the gray level h (r) and the gray level h (O) by using a 2; a e) horizontal axis and the distance r, vertical axis the resulting logarithmic scale as a function V (r), the V follows a curve associated with the (r) step a; and f) the slope of the curve step to decide as a structural parameter α of the bone.
記述したように、骨インプラントが予定される位置で骨の3次元画像が提供されると、3次元画像が、骨の構造パラメータを決定するために、2次元画像として処理されるべき平面上に投影されるか、又は骨の構造パラメータを決定するために、3次元画像として処理される。 As described, when a 3D image of bone is provided at a location where a bone implant is planned, the 3D image is on a plane to be processed as a 2D image to determine bone structural parameters. Projected or processed as a three-dimensional image to determine bone structural parameters.
骨の構造パラメータを得る好ましい方法は、特許文献4に記載されており、計算装置が、デジタル化された2次元又は3次元画像を処理するために以下の工程を実施することに要約される。
a)2次元又は3次元画像の関心領域における2次元又は3次元画像の各画素のグレーレベルh(O)を検索する工程;
b)前記グレーレベルh(O)が検索された画素の周囲の距離rにおける画素のセットを選択する工程;
c)前記画素のセットのグレーレベルh(r)を検索する工程;
d)式:V(r)=[h(r)・h(O)]2を用いて前記グレーレベルh(r)と前記グレーレベルh(O)との相違を表す関数V(r)を計算する工程;
e)よこ軸を前記距離rとし、たて軸を前記関数V(r)とする対数スケールで得られる、前記V(r)に関連づけられた曲線をたどる工程;及び
f)前記曲線の勾配を前記骨の構造パラメータαとして決定する工程。
A preferred method of obtaining structural parameters of bone is described in Patent Document 4, computing device, it is summarized in carrying out the process of the following to process 2-dimensional or 3-dimensional images digitized .
a) retrieving the gray level h (O) of each pixel of the 2D or 3D image in the region of interest of the 2D or 3D image ;
b) the gray level h (O) a step of selecting a cell Tsu City of pixels at a distance r around a pixel retrieved;
the step of searching c) before Kiga elementary set of gray level h (r);
d) formula: V a (r) = [h (r ) · h (O)] function representing the difference between the gray level h (r) and the gray level h (O) with 2 V (r) Calculating step ;
the gradient of and f) said curve; a e) horizontal axis and the distance r, obtain a vertical axis on a logarithmic scale and the function V (r), the process follows the associated with the V (r) curve as Engineering be determined as the structural parameters α of the bone.
Claims (2)
a)2次元又は3次元画像の関心領域における2次元又は3次元画像の各画素のグレーレベルh(O)を検索する工程;
b)前記グレーレベルh(O)が検索された画素の周囲の距離rにおける画素のセットを選択する工程;
c)前記画素のセットのグレーレベルh(r)を検索する工程;
d)式:V(r)=[h(r)・h(O)]2を用いて前記グレーレベルh(r)と前記グレーレベルh(O)との相違を表す関数V(r)を計算する工程;
e)よこ軸を前記距離rとし、たて軸を前記関数V(r)とする対数スケールで得られる、前記V(r)に関連づけられた曲線をたどる工程;及び
f)前記曲線の勾配を前記骨の構造パラメータαとして決定する工程。 A method according to any one of claims 1-8, wherein the computing device, the next step a for processing a two-dimensional or three-dimensional image of the structural parameters alpha, digitized in the bone ) To step f) are performed in a continuous manner and determined.
a) retrieving the gray level h (O) of each pixel of the 2D or 3D image in the region of interest of the 2D or 3D image ;
b) the gray level h (O) a step of selecting a cell Tsu City of pixels at a distance r around a pixel retrieved;
the step of searching c) before Kiga elementary set of gray level h (r);
d) formula: V a (r) = [h (r ) · h (O)] function representing the difference between the gray level h (r) and the gray level h (O) with 2 V (r) Calculating step ;
the gradient of and f) said curve; a e) horizontal axis and the distance r, obtain a vertical axis on a logarithmic scale and the function V (r), the process follows the associated with the V (r) curve as Engineering be determined as the structural parameters α of the bone.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2014/059963 WO2014147566A1 (en) | 2013-03-19 | 2014-03-19 | A method of determining an indicator for the stability of a bone implant |
Publications (3)
Publication Number | Publication Date |
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JP2016518170A JP2016518170A (en) | 2016-06-23 |
JP2016518170A5 true JP2016518170A5 (en) | 2018-09-20 |
JP6429858B2 JP6429858B2 (en) | 2018-11-28 |
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JP2016503763A Active JP6429858B2 (en) | 2014-03-19 | 2014-03-19 | Method for determining the index of bone implant stability |
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Families Citing this family (2)
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EP3964164A1 (en) | 2020-09-02 | 2022-03-09 | Ivoclar Vivadent AG | Method for producing a dental prosthesis, blank, and dental prosthesis |
WO2023078545A1 (en) * | 2021-11-03 | 2023-05-11 | Medimaps Group Sa | Method for analyzing a texture of a bone from a digitized image |
Family Cites Families (2)
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FR2848694B1 (en) * | 2002-12-17 | 2005-06-10 | Laurent Pothuaud | METHOD FOR DETERMINING A 3D STRUCTURE FROM A 2D IMAGE, IN PARTICULAR THE STRUCTURE OF A BONE |
EP2143451A1 (en) * | 2008-07-11 | 2010-01-13 | Nobel Biocare Services AG | Bone implant application |
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