JP2007252853A - Image processing method for symmetrical arrangement of digital images of right and left mammae by automatic adjustment of nipples heights - Google Patents

Image processing method for symmetrical arrangement of digital images of right and left mammae by automatic adjustment of nipples heights Download PDF

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JP2007252853A
JP2007252853A JP2006110339A JP2006110339A JP2007252853A JP 2007252853 A JP2007252853 A JP 2007252853A JP 2006110339 A JP2006110339 A JP 2006110339A JP 2006110339 A JP2006110339 A JP 2006110339A JP 2007252853 A JP2007252853 A JP 2007252853A
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image
breast image
breast
images
processing method
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Chang Gun Lee
彰 建 李
Hyung-Sik Choi
迥 植 崔
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MEDICAL STANDARD CO Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
    • A61B5/0091—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for mammography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
    • A61B6/50—Clinical applications
    • A61B6/502—Clinical applications involving diagnosis of breast, i.e. mammography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
    • A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
    • A61B6/5211—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data
    • A61B6/5229—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data combining image data of a patient, e.g. combining a functional image with an anatomical image
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/36—Image-producing devices or illumination devices not otherwise provided for
    • A61B2090/363—Use of fiducial points
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2576/00—Medical imaging apparatus involving image processing or analysis
    • A61B2576/02—Medical imaging apparatus involving image processing or analysis specially adapted for a particular organ or body part
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a breast image processing method, which can symmetrically arrange images of right and left mammae captured by a digital mamma photographing technique by automatically adjusting heights of nipple positions (tips). <P>SOLUTION: The method includes a step to search each tip position from a left mamma image and a right mamma image, and a mamma image arrangement step to arrange the left mamma image and the right mamma image so that the tip positions of the left mamma image and of the right mamma image could be located in a transverse line based on the searched tip positions, which allows nipple tips to be on a level and eliminates a disadvantage that doctors should manually adjust the heights of the mammae so as to be symmetry for removing unnecessary parts by a preprocessing or the like on their interpretation. The method also includes a step to synthesize the left and right images into an image by stitching the symmetrical images, which allows image printing including of photographing the symmetrical mammae in a film for saving films. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、デジタル左右乳房映像の映像処理方法に関する。   The present invention relates to an image processing method for digital left and right breast images.

フィルム乳房撮影術（ｆｉｌｍ ｍａｍｍｏｇｒａｐｈｙ）の場合、左右乳房がそれぞれ上下方向（ＣＣ：ＣｒａｎｉｏＣａｕｄａｌ）、内外斜位方向（ＭＬＯ：ＭｅｄｉｏＬａｔｅｒａｌ Ｏｂｌｉｑｕｅ）に撮影され、４枚のフィルムが得られる。医師らは、このフィルムを蛍光板のビューボックスにかけて判読または診断を行う。   In the case of film mammography, the left and right breasts are photographed in the up-down direction (CC: CranioCaudal) and inward and outward oblique directions (MLO: Medial Lateral Oblique), respectively, to obtain four films. Doctors read or diagnose this film by placing it in a view box on a fluorescent screen.

最近になり、コンピュータ撮影術（ＣＲ：Ｃｏｍｐｕｔｅｄ Ｒａｄｉｏｇｒａｐｈｙ）とデジタル乳房撮影術（ｄｉｇｉｔａｌ ｍａｍｍｏｇｒａｐｈｙ）も、左右乳房のデジタル映像を得るのに利用されている。現在は、左右乳房に対して４枚のフィルムを作って医師らが判読するか、または診断用高解像度モニタを利用してデジタル映像を判読している。   Recently, computer radiography (CR) and digital mammography have also been used to obtain digital images of left and right breasts. Currently, doctors make four films for the left and right breasts, or read digital images using a high-resolution monitor for diagnosis.

かかる既存の方式は、医師らが一つ一つ左右乳房の映像の高さを手作業でもって合わせて左右対称状態にしなければならないという不都合があった。   Such an existing method has a disadvantage in that doctors have to make the left and right breast image heights one by one by hand to make it symmetrical.

従って、本発明の目的は、左右乳房映像の高さを自動的に合わせることができるデジタル左右乳房映像の処理方法を提供するところにある。   Accordingly, an object of the present invention is to provide a digital left and right breast image processing method capable of automatically adjusting the height of left and right breast images.

前述の本発明の目的を達成するために、本発明は、デジタル乳房撮影術により得られた左右乳房映像のための乳房映像処理方法を提供し、該方法は、左側乳房映像及び右側乳房映像のそれぞれからその先端位置を探すステップと、前記見つけられた先端位置に基づき、左側乳房映像の先端位置と右側乳房映像の先端位置とが左右方向で同一線上に置かれるように、左側乳房映像及び右側乳房映像を配置する乳房映像配置のステップとを含む。   In order to achieve the above-described object of the present invention, the present invention provides a breast image processing method for left and right breast images obtained by digital mammography, which includes left and right breast images. Finding the tip position from each of the left breast image and the right breast image so that the tip position of the left breast image and the tip position of the right breast image are on the same line in the left-right direction based on the found tip position. Breast image placement steps for placing breast images.

乳房映像配置のステップは、左側乳房映像及び右側乳房映像のそれぞれから乳房の境界を抽出するステップと、抽出された乳房の境界の先端位置を決定するステップと、決定された先端位置に対応する左側乳房映像及び右側乳房映像の位置が左右方向の同一線上に位置するように、左側乳房映像及び右側乳房映像を整列するステップを含む。   The breast image placement step includes a step of extracting a breast boundary from each of the left breast image and the right breast image, a step of determining a tip position of the extracted breast boundary, and a left side corresponding to the determined tip position Aligning the left breast image and the right breast image so that the positions of the breast image and the right breast image are on the same line in the left-right direction.

前記先端位置は、乳首の位置である。   The tip position is a nipple position.

乳房映像配置のステップは、左側乳房映像及び右側乳房映像の対称軸を基準に、左側乳房映像及び右側乳房映像をそれらの先端が互いに遠く離れている状態になるように配置するステップをさらに含む。   The breast image placement step further includes a step of placing the left breast image and the right breast image so that their tips are far away from each other with respect to the symmetry axis of the left breast image and the right breast image.

乳房映像配置のステップ後、左側乳房映像と右側乳房映像とを結合し、左側乳房映像と右側乳房映像とを収めている１枚の乳房映像を生成するステップをさらに含む。   After the breast image placement step, the method further includes combining the left breast image and the right breast image to generate a single breast image containing the left breast image and the right breast image.

本発明によれば、乳房の先端位置が自動的に同じ高さにでき、医師らが映像に対する判読を行うまで映像の配置、乳首の位置合わせなどに必要な作業量を減らすことができる。また、左右乳房映像を１枚の映像に結合するために、フィルム使用量も半分に減らすことができる。さらに、乳房先端位置を同じ高さにすることができ、また前処理などを利用して不要な部分を除去するために、判読時に便利であるという利点もある。   According to the present invention, the position of the tip of the breast can be automatically made the same height, and the amount of work required for image placement, nipple positioning, etc. can be reduced until doctors interpret the image. Also, since the left and right breast images are combined into a single image, the amount of film used can be reduced by half. Furthermore, the breast tip position can be made the same height, and there is also an advantage that it is convenient at the time of reading because unnecessary portions are removed by using preprocessing or the like.

以下、添付された図面を参照しつつ、本発明の望ましい実施例を詳細に説明する。   Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

図１は、本発明の例示的な実施例によるデジタル左右乳房映像の処理方法のフローチャートである。図２Ａないし図９Ｂを参照しつつ、図１のフローチャートを詳細に説明する。   FIG. 1 is a flowchart of a digital left and right breast image processing method according to an exemplary embodiment of the present invention. The flowchart of FIG. 1 will be described in detail with reference to FIGS. 2A to 9B.

まず、コンピュータ撮影術またはデジタル乳房撮影術により図２Ａと図２Ｂに示した乳房映像が獲得される（ステップＳ１１）。このとき、獲得された左右乳房映像は、その映像に含まれたヘッダ情報に基づき、左側乳房映像であるか、または右側乳房映像であるかが判断され、画面の左側または右側に配置される。図２Ａに示した乳房映像は、上下方向撮影により得られた映像であり、図２Ｂに示した乳房映像は内外斜位方向撮影により得られた映像である。図２Ａは、左側乳房映像が左側に配置され、右側乳房映像が右側に配置された例を示している。一方、図２Ｂは、右側乳房映像が左側に配置され、左側乳房映像が右側に配置された例を示している。   First, the mammograms shown in FIGS. 2A and 2B are acquired by computer radiography or digital mammography (step S11). At this time, it is determined whether the acquired left and right breast images are left breast images or right breast images based on header information included in the images, and the left and right breast images are arranged on the left or right side of the screen. The breast image shown in FIG. 2A is an image obtained by vertical photographing, and the breast image shown in FIG. 2B is an image obtained by photographing inside and outside obliquely. FIG. 2A shows an example in which the left breast image is arranged on the left side and the right breast image is arranged on the right side. On the other hand, FIG. 2B shows an example in which the right breast image is arranged on the left side and the left breast image is arranged on the right side.

図２Ａ及び図２Ｂに示した左右乳房映像は、その映像から不要な部分の除去などを行うために、前処理される（ステップＳ１３）。ステップＳ１３を図２Ｂに示した映像について説明すれば、図２Ｂの右側にある映像は、１８０°回転される。それにより、図２Ｂに示した映像は、図４Ｂに示したように配置される。その後、図３で、点線で表示された領域３３が右側乳房映像３１と左側乳房映像３２とから切り取られてなくなる。このとき、右側乳房映像３１では、紙面上の左側部分、すなわち、観察者が見るとき、右側部分が切り取られてなくなり、左側乳房映像３２では、紙面上の右側部分、すなわち、観察者が見るとき、左側部分が切り取られてなくなる。その後、右側乳房映像３１の左側最上端及び左側最下端のコーナー部分３４は、黒色に塗られ、左側乳房映像３２の右側最上端及び右側最下端のコーナー部分３５も黒色に塗られる。ステップＳ１３は、自動的に行われうる。その結果、図４Ｂに示したような左右乳房映像が得られる。図２Ａに示した映像に対してもそれと類似の前処理が行われ、その結果、図４Ａに示したような左右乳房映像が得られる。このように前処理された左右乳房映像は、図４Ａ及び図４Ｂを見れば分かるように、乳房の先端に該当する乳首が同じ高さに位置しない。   The left and right breast images shown in FIGS. 2A and 2B are preprocessed in order to remove unnecessary portions from the images (step S13). If step S13 is demonstrated about the image | video shown to FIG. 2B, the image | video on the right side of FIG. 2B will be rotated 180 degrees. Thereby, the video shown in FIG. 2B is arranged as shown in FIG. 4B. Thereafter, in FIG. 3, the region 33 indicated by the dotted line is not cut out from the right breast image 31 and the left breast image 32. At this time, in the right breast image 31, the left part on the paper surface, that is, when the observer sees, the right part is not cut off, and in the left breast image 32, the right part on the paper surface, that is, when the observer sees. , The left part is cut off. Thereafter, the left uppermost corner and the left lowermost corner portion 34 of the right breast image 31 are painted black, and the right uppermost edge and the right lowermost corner portion 35 of the left breast image 32 are painted black. Step S13 can be performed automatically. As a result, left and right breast images as shown in FIG. 4B are obtained. A similar pre-processing is performed on the image shown in FIG. 2A, and as a result, left and right breast images as shown in FIG. 4A are obtained. As can be seen from the left and right breast images preprocessed in this manner, the nipple corresponding to the tip of the breast is not located at the same height, as can be seen from FIGS. 4A and 4B.

図４Ａ及び図４Ｂに示した映像は、乳房の先端が同じ高さに位置するように処理される（ステップＳ１５）。図５Ａは、ステップＳ１５で利用される自動乳首検索アルゴリズムを説明するための図面である。自動乳首検索アルゴリズムは、デジタル乳房映像をマスキングするステップ、乳房領域と背景領域との境界地点を探すステップ、及び決められた境界線で乳首の位置（正確には、先端位置）を決定ステップを含む。   The images shown in FIGS. 4A and 4B are processed so that the tip of the breast is positioned at the same height (step S15). FIG. 5A is a drawing for explaining the automatic nipple search algorithm used in step S15. The automatic nipple search algorithm includes the steps of masking the digital breast image, searching for a boundary point between the breast region and the background region, and determining a nipple position (more precisely, a tip position) at the determined boundary line. .

映像マスキングステップでは、例えば、図４Ｂの左側に示した乳房映像（右側乳房映像）と同一の乳房映像（図５の（ａ））は、映像マスキング処理される。Ｗを図５の（ａ）の映像の幅、Ｈをその高さとし、Ｍｉｎは、最小画素値とするとき、映像マスキングに利用されるアルゴリズムは、ほぼ次の通りである。
Ｆｏｒ（ｙ＝０；ｙ＜Ｈ；ｙ＋＋）
Ｆｏｒ（ｘ＝０；ｘ＜Ｗ；ｘ＋＋）
Iｆ（Ｐ（ｘ，ｙ）＞Ｍｉｎ）ｔｈｅｎ
Ｍ（ｘ，ｙ）＝１
Ｅｌｓｅ
Ｍ（ｘ，ｙ）＝０
Ｅｎｄ Iｆ
Ｅｎｄ Ｆｏｒ
Ｅｎｄ Ｆｏｒ In the video masking step, for example, the same breast image ((a) in FIG. 5) as the breast image (right breast image) shown on the left side of FIG. 4B is subjected to image masking processing. When W is the width of the image in FIG. 5A, H is its height, and Min is the minimum pixel value, the algorithm used for image masking is as follows.
For (y = 0; y <H; y ++)
For (x = 0; x <W; x ++)
If (P (x, y)> Min) then
M (x, y) = 1
Else
M (x, y) = 0
End If
End For
End For

かかる映像マスキングアルゴリズムにより、図５の（ｂ）に示したような映像が得られる。   By such a video masking algorithm, a video as shown in FIG. 5B is obtained.

その後、境界地点検索ステップでは、図５の（ｂ）に示したマスキングされた映像で、黒領域５１と白領域５３との境界地点が見つかる。このために利用されるアルゴリズムの例は、Ｅ（ｙ）をｙ地点での境界地点のｘ値とするとき、次の通りである。
Ｆｏｒ（ｙ＝０；ｙ＜Ｈ；ｙ＋＋）
Ｆｏｒ（ｘ＝０；ｘ＜Ｗ；ｘ＋＋）
Iｆ（Ｍ（ｘ，ｙ）＝＝１）ｔｈｅｎ
Ｅ（ｙ）＝ｘ
Ｂｒｅａｋ；
Ｅｎｄ Iｆ
Ｅｎｄ Ｆｏｒ
Ｅｎｄ Ｆｏｒ Thereafter, in the boundary point search step, a boundary point between the black region 51 and the white region 53 is found in the masked video shown in FIG. An example of an algorithm used for this purpose is as follows when E (y) is the x value of the boundary point at the y point.
For (y = 0; y <H; y ++)
For (x = 0; x <W; x ++)
If (M (x, y) == 1) then
E (y) = x
Break;
End If
End For
End For

このアルゴリズムを利用すれば、各境界地点は、図５の（ｂ）の映像を構成する最上位ラインから最下位ラインまで進みつつ見つけられる。   If this algorithm is used, each boundary point can be found while proceeding from the highest line to the lowest line constituting the video shown in FIG.

その後、乳首の位置決定ステップが行われる。図５の（ｃ）に示した映像の場合、乳首の位置ＮＰは、境界地点のうち、最も小さなｘ値に対応するｙ位置になるので、使われるアルゴリズムの例は、次の通りである。
ＮＰ＝０；
ＭｉｎＥＹ＝６５５３５；
Ｆｏｒ（ｙ＝０；ｙ＜Ｈ；ｙ＋＋）
Ｉｆ（ＭｉｎＥＹ＞Ｅ（ｙ））
ＭｉｎＥＹ＝Ｅ（ｙ）
ＮＰ＝ｙ
Ｅｎｄ Ｉｆ
Ｅｎｄ Ｆｏｒ Thereafter, a nipple position determining step is performed. In the case of the video shown in FIG. 5C, the nipple position NP is the y position corresponding to the smallest x value among the boundary points, and an example of the algorithm used is as follows.
NP = 0;
MinEY = 65535;
For (y = 0; y <H; y ++)
If (MinEY> E (y))
MinEY = E (y)
NP = y
End If
End For

一方、図４Ａに示した左側乳房映像のように右に突出するように置かれた乳房の場合、乳首の位置は、乳房の境界線で最も大きいｘ値に対応するｙ位値になる。自動乳首検索アルゴリズムを利用すれば、乳房で左側方向に最も突出した部分を探すことができる。従って、乳首が陥没型である場合にも、乳首に該当すると見ることができる乳房の先端を探すことが可能である。   On the other hand, in the case of a breast placed so as to protrude to the right as in the left breast image shown in FIG. 4A, the position of the nipple is the y-order value corresponding to the largest x value on the boundary line of the breast. If the automatic nipple search algorithm is used, it is possible to search for the most protruding portion of the breast in the left direction. Therefore, even when the nipple is depressed, it is possible to search for the tip of the breast that can be seen as corresponding to the nipple.

自動乳首検索アルゴリズムにより乳首の位置が見つけられない場合、図６に示した例のような画面がユーザに提供される。この画面を見るユーザは、マウスのダブルクリックなどを利用して乳首の位置を指定し、それにより、指定された乳首の位置に基づき、左側乳房映像の乳首と右側乳房映像の乳首とが同じ高さになるように自動的に位置が調節されうる。異なっては、ユーザがマウスを利用した映像のドラッグを利用してガイドラインに乳首の位置を合わせる方式で両乳房映像の乳首高さを合わせることも可能である。このように、ステップＳ１５が完了すれば、図７Ａ及び図７Ｂに示したように、両乳房映像は、乳首の高さが同一になるように位置する。   When the automatic nipple search algorithm cannot find the position of the nipple, a screen like the example shown in FIG. 6 is provided to the user. The user viewing this screen specifies the nipple position using a double click of the mouse, etc., so that the nipple in the left breast image and the nipple in the right breast image are the same height based on the specified nipple position. The position can be adjusted automatically so that Differently, the nipple heights of both breast images can be matched by a method in which the user uses the mouse to drag the image to align the nipple position with the guideline. In this way, when step S15 is completed, as shown in FIGS. 7A and 7B, both breast images are positioned so that the nipples have the same height.

ステップＳ１５が完了した後、乳首高さが合わせられた左右乳房映像のそれぞれには、当該映像がいかように撮影された映像であるか、そして左側乳房映像であるか、または右側乳房映像であるかを表すマークが挿入される（ステップＳ１７）。例えば、図７Ａの左側の映像には、右側乳房映像であることを表す英文字Ｒと上下方向に撮影された映像であることを表す英文字ＣＣが共に入っているマークが表示される。図７Ｂの右側の映像には、左側乳房映像であることを表す英文字Ｌと内外斜位方向に撮影された映像であることを表す英文字ＭＬＯが共に入っているマークが表示される。   After step S15 is completed, each of the left and right breast images with the adjusted nipple height is an image of how the image is taken and whether it is a left breast image or a right breast image. A mark representing this is inserted (step S17). For example, in the video on the left side of FIG. 7A, a mark is displayed that contains both the English letter R representing the right breast image and the English letter CC representing the video taken in the vertical direction. In the image on the right side of FIG. 7B, a mark is displayed that includes both the English letter L representing the left breast image and the English character MLO representing the image photographed in the oblique direction.

一方、図７Ａまたは図７Ｂに示した映像は、左側乳房映像と右側乳房映像とが同じ画面上に同時に示されているが、それらは、別個の映像である。従って、互いに高さが合わされた映像を１枚の映像に作る作業が必要である。このために、左右乳房映像を１枚の映像に合わせる処理、例えば、スティチング処理が行われる（ステップＳ１９）。ステップＳ１９により、スティチング処理が行われれば、左側乳房映像と右側乳房映像は、１枚の映像に作られる。その映像は、不要な余白、すなわち乳房の背景映像がある程度は除外された映像でありうる。図８は、ユーザがスティチング処理を行うために、該当ボタンを押したとき、乳房映像に対するスティッチング処理が進行中であるということを示している。   On the other hand, in the image shown in FIG. 7A or 7B, the left breast image and the right breast image are simultaneously shown on the same screen, but they are separate images. Therefore, it is necessary to create an image in which the heights are adjusted to one image. For this purpose, processing for matching the left and right breast images to one image, for example, stitching processing is performed (step S19). If the stitching process is performed in step S19, the left breast image and the right breast image are made into one image. The image may be an image in which unnecessary white space, that is, a background image of the breast is excluded to some extent. FIG. 8 shows that the stitching process for the breast image is in progress when the user presses the corresponding button to perform the stitching process.

図９Ａ及び図９Ｂは、スティッチング処理が完了した場合の左右乳房の映像を示しており、特に、図９Ａは、上下方向に撮影された１枚の左右乳房映像を示し、図９Ｂは、内外斜位方向に撮影された１枚の左右乳房映像を示す。図９Ａ及び図９Ｂに示した映像のそれぞれは、必要によって保存されたりフィルムに出力されうる。   9A and 9B show the left and right breast images when the stitching process is completed. In particular, FIG. 9A shows one left and right breast image taken in the vertical direction, and FIG. 9B shows the inner and outer breast images. A single left and right breast image taken in the oblique direction is shown. Each of the images shown in FIGS. 9A and 9B can be stored or output to film as needed.

本発明のデジタル左右乳房映像を、自動的に乳首の高さを合わせて左右対称に配置する映像処理方法は、例えば、医療診断関連の技術分野で効果的に適用可能である。   The digital left and right breast image of the present invention can be effectively applied in a technical field related to medical diagnosis, for example, by automatically arranging the left and right breast images symmetrically with the nipple height adjusted.

本発明の例示的な実施例によるデジタル左右乳房映像の処理方法を図示するフローチャートである。4 is a flowchart illustrating a method for processing a digital left and right breast image according to an exemplary embodiment of the present invention. デジタル乳房撮影術で得られた左右乳房映像を示し、上下方向に撮影された左右乳房映像を示す写真である。It is a photograph showing left and right breast images obtained by digital mammography and showing left and right breast images taken in the vertical direction. デジタル乳房撮影術で得られた左右乳房映像を示し、内外斜位方向に撮影された左右乳房映像を示す写真である。It is a photograph showing the left and right breast images obtained by digital mammography and the left and right breast images taken in the oblique direction. 乳房映像の前処理を説明するための図面である。It is a figure for demonstrating the pre-processing of a breast image | video. 図２Ａの左右乳房映像のうち、左側の乳房映像を左右に１８０°回転した写真である。It is the photograph which rotated the left breast image 180 degree | times to the left and right among the left and right breast images of FIG. 2A. 図２Ｂの左右乳房映像のうち、右側の乳房映像を上下に１８０°回転した写真である。It is the photograph which rotated the right breast image 180 degrees up and down among the right and left breast images of FIG. 2B. 左右乳房映像の自動乳首の位置検索アルゴリズムを説明するための図面である。It is a figure for demonstrating the automatic nipple position search algorithm of a left-right breast image. 手動で乳首の位置を一致させる作業を説明するための写真である。It is a photograph for demonstrating the operation | work which matches the position of a nipple manually. 図４Ａの左右乳房映像の乳首位置を左右方向に一致させた写真である。4B is a photograph in which the nipple positions of the left and right breast images in FIG. 4A are matched in the left-right direction. 図４Ｂの左右乳房映像の乳首の位置を左右方向に一致させた写真である。It is the photograph which matched the position of the nipple of the right-and-left breast image of FIG. 4B in the left-right direction. 左右乳房映像のスティチングを説明するための写真である。It is a photograph for explaining the stitching of the left and right breast images. 左右乳房映像から得られた単一乳房映像を示し、上下方向に撮影された左右乳房映像から得られた単一乳房映像を示す写真である。It is the photograph which shows the single breast image obtained from the right and left breast image image | photographed from the left and right breast image which showed the single breast image obtained from the right and left breast image. 左右乳房映像から得られた単一乳房映像を示し、内外斜位方向に撮影された左右乳房映像から得られた単一乳房映像を示す写真である。It is a photograph showing a single breast image obtained from left and right breast images and showing a single breast image obtained from left and right breast images taken in the oblique direction of the inside and outside.

符号の説明Explanation of symbols

３１ 右側乳房映像
３２ 左側乳房映像
３３ 点線表示領域
３４ 左側最上端及び左側最下端のコーナー部分
３５ 右側最上端及び右側最下端のコーナー部分
５１ 黒領域
５３ 白領域
Ｈ 映像の高さ
Ｗ 映像の幅 31 Right breast image 32 Left breast image 33 Dotted line display area 34 Corner portion at upper left end and lower left end 35 Corner portion at upper right end and lower right end 51 Black region 53 White region H Image height W Image width

Claims (5)

デジタル乳房撮影術により得られた左右乳房映像のための乳房映像処理方法において、
左側乳房映像及び右側乳房映像のそれぞれからその先端位置を探すステップと、
前記見つけられた先端位置に基づき、左側乳房映像の先端位置と右側乳房映像の先端位置とが左右方向で同一線上に置かれるように、左側乳房映像及び右側乳房映像を配置する乳房映像配置のステップとを含むことを特徴とする乳房映像処理方法。 In a breast image processing method for left and right breast images obtained by digital mammography,
Searching for the tip position from each of the left and right breast images;
A breast image placement step of placing the left breast image and the right breast image so that the tip position of the left breast image and the tip position of the right breast image are placed on the same line in the left-right direction based on the found tip position A breast image processing method comprising: 乳房映像配置のステップは、左側乳房映像及び右側乳房映像のそれぞれから乳房の境界を抽出するステップと、
抽出された乳房の境界の先端位置を決定するステップと、
決定された先端位置に対応する左側乳房映像及び右側乳房映像の位置が左右方向の同一線上に位置するように、左側乳房映像及び右側乳房映像を整列するステップとを含むことを特徴とする請求項１に記載の乳房映像処理方法。 The breast image placement step includes extracting a breast boundary from each of the left breast image and the right breast image;
Determining the tip position of the extracted breast boundary;
And aligning the left breast image and the right breast image so that the positions of the left breast image and the right breast image corresponding to the determined tip position are on the same line in the left-right direction. 2. The breast image processing method according to 1. 前記先端位置は、乳首の位置であることを特徴とする請求項２に記載の乳房映像処理方法。   The breast image processing method according to claim 2, wherein the tip position is a nipple position. 前記乳房映像配置のステップは、左側乳房映像及び右側乳房映像の対称軸を基準に、左側乳房映像及び右側乳房映像をそれらの先端が互いに遠く離れている状態になるように配置するステップをさらに含むことを特徴とする請求項１に記載の乳房映像処理方法。   The breast image placement step further includes a step of placing the left breast image and the right breast image so that their tips are far apart from each other with respect to the symmetry axis of the left breast image and the right breast image. The breast image processing method according to claim 1, wherein: 乳房映像配置のステップ後、左側乳房映像と右側乳房映像とを合わせ、左側乳房映像と右側乳房映像とを収めている１枚の乳房映像を生成するステップをさらに含む請求項１から請求項４のうちいずれか１項に記載の乳房映像処理方法。   5. The method of claim 1, further comprising the step of combining the left breast image and the right breast image after the breast image placement step to generate a single breast image containing the left breast image and the right breast image. The breast image processing method of any one of them.
JP2006110339A 2006-03-21 2006-04-12 Image processing method for symmetrical arrangement of digital images of right and left mammae by automatic adjustment of nipples heights Pending JP2007252853A (en)

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