JP2007007440A - 医療画像において腫瘤や実質組織変形をコンピュータを用いて検出する自動化した方法と装置 - Google Patents
医療画像において腫瘤や実質組織変形をコンピュータを用いて検出する自動化した方法と装置 Download PDFInfo
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- JP2007007440A JP2007007440A JP2006244130A JP2006244130A JP2007007440A JP 2007007440 A JP2007007440 A JP 2007007440A JP 2006244130 A JP2006244130 A JP 2006244130A JP 2006244130 A JP2006244130 A JP 2006244130A JP 2007007440 A JP2007007440 A JP 2007007440A
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- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0012—Biomedical image inspection
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- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/11—Region-based segmentation
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10116—X-ray image
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20048—Transform domain processing
- G06T2207/20061—Hough transform
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- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
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- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
- G06T2207/30068—Mammography; Breast
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
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Abstract
【解決手段】(a)乳房撮像画像内において解剖学的高濃度部分を識別するステップと、(b)前記高濃度部分を処理するステップとから成り、前記画像の前記高濃度部分を識別するステップが、(I)対象領域を、複数の画素を有する前記画像内の、胸壁と乳房境界の少なくとも1つに近接する前記画像上に位置付けするステップと、(II)第1の画素のグレーレベルヒストグラムを得るステップと、(III)第2のグレーレベルヒストグラムを得るステップと、(IV)グレーレベル閾値を求めるステップと、から成る乳房撮像画像の視覚化を高める方法。
【選択図】図1
Description
かくして、コンピュータ使用の他の目的は、多くの誤って悪性の病巣が有るとした診断を減らすことにより、放射線技師を支援するために、客観的な仕方で良性と悪性の病巣の特性を抽出し、分析することにあり、それにより、患者の死亡率および実施される外科的生検数、ならびにそれに伴う合併症を減らす。
ここで図面、特に図1を参照すると、乳房画像における病巣を検出および分類する自動化された方法の概略図が示される。この全体方式には、一対の乳房撮像の初期取得とディジタル化(ステップ100)が含まれる。次に乳房境界は、画像部位の残りから区分され(ステップ101)、また皮下脂肪の領域は識別される(ステップ102)。形態学的フィルタリングが実施され(ステップ103)、ROI(対象領域)は胸壁に沿って置かれ(ステップ104)、ヒストグラム分析が全体画像領域と、丁度ROI内とで実施される(ステップ105)。ヒストグラム分析から求められた閾値を使用して、画像は、閾値処理されて高濃度部分が生じ(ステップ106)、高濃度パーセントが計算される(ステップ107)。
ここにρは、座標系の原点から記述される直線までの距離であり、またθは、ρ軸とこの線の法線との間の角度である。Hough変換は、P−θパラメータ定義域の単一点(ρ、θ)に対してこの線をマップする(図15Aおよび15B)。
ζk=f(x,y) (5)
および
ζi =h(u,v) (6)
ここに、
k=xN+y+1 (7)
l=uNh +v+1 (8)
ついでHough変換は、下記の式(9)のように行列代数学に関して表すことができる。
−(N−1)≦ρ≦√√2(N−1) (12)
このHoughスペクトルの実際の定義域は、図16Cにより示される。θが−π/2からπ/2へ変わると、ρは4つの正弦曲線カーブl0 、l1 、l2 およびl3 により段階的に制約される範囲内にあり、これらのカーブは、図16Aおよび16BのP0 (0,0)、P1 (0,N−1)、P2 (N−1,0)およびP0 (N−1,N−1)の行列の4つの隅の画素の変換に対応する。
ここにμおよびσはそれぞれ、Houghスペクトルの平均および標準偏差であり、またηは係数である。そのようフォーマットは、平均偏差組合せと呼ばれる。
Claims (2)
- (a)左右の乳房撮影画像を得るステップと、
(b)前記左右の乳房撮影画像の少なくとも1つにおいて、解剖学的高濃度部分を識別するステップと、
(c)高濃度部分が識別された乳房撮影画像がより均一な濃度を有するように、前記識別ステップで識別された前記高濃度部分を、背景濃度補正と、前記高濃度部分の画素の正規化によって処理するステップと、
(d)前記高濃度部分を処理するステップの後に、前記左右乳房撮影画像を処理して組み合わせ画像を得るステップと、
(e)前記組み合わせ画像に対して特徴分析を行い、前記組み合わせ画像から特徴を抽出するステップと、
(f)抽出特徴に基づいた病巣を検出するステップと、
から成る乳房撮影画像内における病巣検出方法。 - 前記高濃度部分を処理するステップが、前記高濃度部分の背景傾向を補正するステップから成る、請求項1に記載の方法。
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/393,779 US5657362A (en) | 1995-02-24 | 1995-02-24 | Automated method and system for computerized detection of masses and parenchymal distortions in medical images |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003059220A Division JP2004032684A (ja) | 1995-02-24 | 2003-03-05 | 医療画像において腫瘤や実質組織変形をコンピュータを用いて検出する自動化した方法と装置 |
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| Publication Number | Publication Date |
|---|---|
| JP2007007440A true JP2007007440A (ja) | 2007-01-18 |
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Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8525749A Pending JPH10503961A (ja) | 1995-02-24 | 1996-02-23 | 医療画像において腫瘤や実質組織変形をコンピュータを用いて検出する自動化した方法と装置 |
| JP2003059220A Pending JP2004032684A (ja) | 1995-02-24 | 2003-03-05 | 医療画像において腫瘤や実質組織変形をコンピュータを用いて検出する自動化した方法と装置 |
| JP2006244130A Pending JP2007007440A (ja) | 1995-02-24 | 2006-09-08 | 医療画像において腫瘤や実質組織変形をコンピュータを用いて検出する自動化した方法と装置 |
| JP2007168509A Expired - Lifetime JP4634418B2 (ja) | 1995-02-24 | 2007-06-27 | 医療画像において腫瘤や実質組織変形をコンピュータを用いて検出する自動化した方法と装置 |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8525749A Pending JPH10503961A (ja) | 1995-02-24 | 1996-02-23 | 医療画像において腫瘤や実質組織変形をコンピュータを用いて検出する自動化した方法と装置 |
| JP2003059220A Pending JP2004032684A (ja) | 1995-02-24 | 2003-03-05 | 医療画像において腫瘤や実質組織変形をコンピュータを用いて検出する自動化した方法と装置 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007168509A Expired - Lifetime JP4634418B2 (ja) | 1995-02-24 | 2007-06-27 | 医療画像において腫瘤や実質組織変形をコンピュータを用いて検出する自動化した方法と装置 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5657362A (ja) |
| EP (1) | EP0757544B1 (ja) |
| JP (4) | JPH10503961A (ja) |
| AT (1) | ATE491393T1 (ja) |
| AU (1) | AU706993B2 (ja) |
| CA (1) | CA2188394C (ja) |
| DE (1) | DE69638305D1 (ja) |
| WO (1) | WO1996025879A1 (ja) |
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| JP2009082565A (ja) * | 2007-10-01 | 2009-04-23 | Konica Minolta Medical & Graphic Inc | 異常陰影検出装置とプログラム |
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- 1996-02-23 WO PCT/US1996/002065 patent/WO1996025879A1/en not_active Ceased
- 1996-02-23 DE DE69638305T patent/DE69638305D1/de not_active Expired - Lifetime
- 1996-02-23 EP EP96908470A patent/EP0757544B1/en not_active Expired - Lifetime
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- 1996-02-23 AT AT96908470T patent/ATE491393T1/de not_active IP Right Cessation
- 1996-02-23 JP JP8525749A patent/JPH10503961A/ja active Pending
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| WO2008129939A1 (ja) * | 2007-04-12 | 2008-10-30 | Konica Minolta Medical & Graphic, Inc. | 骨疾患評価システム、骨疾患評価方法及びプログラム |
| JP2009082565A (ja) * | 2007-10-01 | 2009-04-23 | Konica Minolta Medical & Graphic Inc | 異常陰影検出装置とプログラム |
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| EP0757544B1 (en) | 2010-12-15 |
| ATE491393T1 (de) | 2011-01-15 |
| AU5170196A (en) | 1996-09-11 |
| JP2004032684A (ja) | 2004-01-29 |
| JPH10503961A (ja) | 1998-04-14 |
| DE69638305D1 (de) | 2011-01-27 |
| EP0757544A4 (en) | 1997-07-09 |
| US5657362A (en) | 1997-08-12 |
| JP2007289729A (ja) | 2007-11-08 |
| CA2188394C (en) | 2010-07-20 |
| WO1996025879A1 (en) | 1996-08-29 |
| JP4634418B2 (ja) | 2011-02-16 |
| EP0757544A1 (en) | 1997-02-12 |
| CA2188394A1 (en) | 1996-08-29 |
| AU706993B2 (en) | 1999-07-01 |
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