JP3534174B2 - Angle measuring device for medical images - Google Patents
Angle measuring device for medical imagesInfo
- Publication number
- JP3534174B2 JP3534174B2 JP30685298A JP30685298A JP3534174B2 JP 3534174 B2 JP3534174 B2 JP 3534174B2 JP 30685298 A JP30685298 A JP 30685298A JP 30685298 A JP30685298 A JP 30685298A JP 3534174 B2 JP3534174 B2 JP 3534174B2
- Authority
- JP
- Japan
- Prior art keywords
- intersection
- line segment
- angle
- medical image
- line segments
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010586 diagram Methods 0.000 description 6
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、医療画像に示され
た二つの線分の角度を計測する医療画像の角度計測装置
に関し、特に、正確に角度が計測できる医療画像の角度
計測装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical image angle measuring device for measuring an angle between two line segments shown in a medical image , and more particularly to an angle of a medical image capable of accurately measuring the angle.
The present invention relates to a measuring device .
【０００２】[0002]
【従来の技術】従来、病院では、レントゲン装置等で撮
影したものは、フィルムで診断等を行っていたが、近
年、医療画像データとして、画像サーバに保存し、この
医療画像データを表示して診断を行うようになってき
た。このような装置は、例えば、”医療画像サーバーIm
ageARQS”，横河技報，Ｖｏｌ．４０ Ｎｏ．３（１９
９６）ｐｐ．１２３〜１２６（ImageARQSは横河電機
（株）の登録商標です。）等に記載されている。2. Description of the Related Art Conventionally, in a hospital, an image taken by an X-ray machine or the like has been diagnosed with a film, but in recent years, it is stored in an image server as medical image data and the medical image data is displayed. I started to diagnose. Such a device may be used, for example, in "Medical Imaging Server Im
ageARQS ”, Yokogawa Technical Report, Vol.40 No.3 (19
96) pp. 123 to 126 (ImageARQS is a registered trademark of Yokogawa Electric Co., Ltd.) and the like.
【０００３】医療画像データは、ＣＴ装置やレントゲン
装置で撮影した胸部、頭部等の断層画面等の医療画像デ
ータであるが、治療の関係上、二つの骨の位置関係、臓
器の位置関係等を把握するために、医療画像表示装置に
表示された医療画像に、図４に示されるように、線分Ｓ
１，Ｓ２からなる折れ線Ｓを求めたい角度に合わせて、
角度を求めていた。Medical image data is medical image data such as a tomographic image of the chest, head, etc. taken by a CT apparatus or an X-ray apparatus, but for the purpose of treatment, the positional relationship between two bones, the positional relationship between organs, etc. In order to grasp the information, a line segment S is added to the medical image displayed on the medical image display device as shown in FIG.
According to the angle you want to find the polygonal line S consisting of 1 and S2,
I was looking for an angle.
【０００４】しかし、医療画像表示装置に表示された医
療画像上に、計測したい角度の交点があれば、角度を求
めることができるが、計測した角度の交点がない場合、
角度を求めることができなった。また、折れ線Ｓを求め
たい角度に合わせるのは大変であった。そこで、図５に
示されるように、画像上に個別に線分Ｓ１，Ｓ２を設定
して、二つの線分Ｓ１，Ｓ２のつくる角度ａ，ｂの大き
さを計測する方法が考えられる。However, if there is an intersection of the angles to be measured on the medical image displayed on the medical image display device, the angle can be obtained, but if there is no intersection of the measured angles,
I couldn't find the angle. Also, it was difficult to match the polygonal line S to the desired angle. Therefore, as shown in FIG. 5, a method may be considered in which line segments S1 and S2 are individually set on the image and the sizes of the angles a and b formed by the two line segments S1 and S2 are measured.
【０００５】しかしながら、実際に必要な角度は、角度
ａの１つであり、医師がどちらかの角度を選択しなけれ
ばならないという問題点があった。However, the angle actually required is one of the angles a, and there is a problem that the doctor must select either one.
【０００６】[0006]
【発明が解決しようとする課題】そこで、本発明の第１
の目的は、容易に角度計測を行い、必要な角度だけを表
示する医療画像の角度計測装置を実現することにある。Therefore, the first aspect of the present invention
The purpose of is to realize an angle measuring device for a medical image that easily measures an angle and displays only a necessary angle.
【０００７】本発明の第２の目的は、計測したい角度
が、医療画像上に角度の交点がない場合でも角度を計測
できる医療画像の角度計測装置を実現することにある。A second object of the present invention is to realize a medical image angle measuring apparatus capable of measuring an angle to be measured even if there is no intersection of the angles on the medical image.
【０００８】[0008]
【課題を解決するための手段】第１の本発明は、医療画
像に示された二つの線分の角度を計測する医療画像の角
度計測装置であって、前記二つの線分の交点を算出する
交点算出手段と、この交点算出手段の交点で分割された
分割線分の距離を算出する距離算出手段と、この距離算
出手段の算出した距離により、前記線分の分割線分の
内、それぞれ長い分割線分を採用する線分採用手段と、
この線分採用手段で採用された分割線分のなす角度を算
出する角度算出手段とを有することを特徴とするもので
ある。A first aspect of the present invention is a medical image angle measuring apparatus for measuring an angle between two line segments shown in a medical image, wherein an intersection of the two line segments is calculated. The intersection calculation means, the distance calculation means for calculating the distance of the division line segment divided at the intersection of the intersection calculation means, and the distance calculated by the distance calculation means, among the division line segments of the line segment, respectively. Line segment adoption means that employs long dividing line segments,
An angle calculating unit for calculating an angle formed by the dividing line segment adopted by the line segment adopting unit.
【０００９】第２の本発明は、第１の本発明において、
交点算出手段は、交点が線分上にない時は、線分を延長
して交点を求め、交点から線分の端点までを分割線分と
することを特徴とするものである。The second aspect of the present invention is the same as the first aspect of the present invention.
The intersection point calculating means is characterized in that, when the intersection point is not on the line segment, the line segment is extended to obtain the intersection point, and the segment from the intersection point to the end point of the line segment is used as the dividing line segment.
【００１０】このような第１の本発明では、交点算出手
段は、二つの線分の交点を算出する。この交点で線分を
分割した分割線分の距離を、距離算出手段は算出する。
この距離により、線分採用手段は、分割線分の内、それ
ぞれ長い分割線分を採用する。採用された分割線分によ
り、角度算出手段は、角度を算出する。In the first aspect of the present invention, the intersection calculating means calculates the intersection of two line segments. The distance calculating means calculates the distance of the dividing line segment obtained by dividing the line segment at this intersection.
Based on this distance, the line segment adopting unit adopts a long segment line segment among the segment line segments. The angle calculation means calculates the angle based on the adopted dividing line segment.
【００１１】第２の本発明では、交点算出手段が、交点
が線分上にない時は、線分を延長して交点を求める。そ
して、距離算出手段、線分採用手段、角度算出手段は、
交点から線分の端点までを分割線分とする。According to the second aspect of the present invention, the intersection calculating means obtains the intersection by extending the line when the intersection is not on the line. Then, the distance calculation means, the line segment adoption means, and the angle calculation means
The line segment from the intersection to the end point of the line segment is defined as the dividing line segment.
【００１２】[0012]
【発明の実施の形態】以下図面を用いて本発明を説明す
る。図１は本発明の一実施例を示した構成図である。図
において、表示手段１は、医療画像（図示せず）、線分
Ｓ１，Ｓ２、角度Ａを表示する。入力手段２は、例え
ば、マウス等で、線分Ｓ１，Ｓ２を表示手段１に入力す
る。表示交点算出手段３は、入力手段２が入力した二つ
の線分Ｓ１，Ｓ２の交点Ｑを算出する。距離算出手段４
は、交点算出手段３の交点Ｑで分割された分割線分の距
離を算出する。線分採用手段５は、距離算出手段４の算
出した距離により、線分Ｓ１，Ｓ２の分割線分の内、そ
れぞれ長い分割線分を採用する。角度算出手段６は、線
分採用手段５で採用された分割線分のなす角度を算出
し、表示手段１に出力する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, the display means 1 displays a medical image (not shown), line segments S1 and S2, and an angle A. The input unit 2 inputs the line segments S1 and S2 to the display unit 1 with a mouse or the like, for example. The display intersection calculation means 3 calculates the intersection Q of the two line segments S1 and S2 input by the input means 2. Distance calculation means 4
Calculates the distance of the dividing line segment divided by the intersection Q of the intersection calculating means 3. The line segment adopting unit 5 adopts a long segment line segment among the segment line segments S1 and S2, according to the distance calculated by the distance calculating unit 4. The angle calculation unit 6 calculates the angle formed by the division line segment adopted by the line segment adoption unit 5, and outputs it to the display unit 1.
【００１３】このような装置の動作を以下で説明する。
図２は図１に示す装置の動作を示したフローチャートで
ある。図３は図１に示す装置の動作説明図である。The operation of such a device will be described below.
FIG. 2 is a flow chart showing the operation of the apparatus shown in FIG. FIG. 3 is an operation explanatory diagram of the apparatus shown in FIG.
【００１４】図３において、（ａ）〜（ｃ）は角度が９
０度以下の場合で、（ａ）が線分Ｓ１，Ｓ２上に交点Ｑ
がある場合、（ｂ）が線分Ｓ２上に交点Ｑがない場合、
（ｃ）が線分Ｓ１，Ｓ２上に交点Ｑがない場合である。
（ｄ），（ｅ）は角度が９０度以上１８０度以下の場合
で、（ｄ）が線分Ｓ１，Ｓ２上に交点Ｑがある場合、
（ｅ）が線分Ｓ１上に交点Ｑがない場合である。In FIGS. 3 (a) to 3 (c), the angle is 9
In the case of 0 degrees or less, (a) shows the intersection Q on the line segments S1 and S2.
If there is no intersection Q on the line segment S2 in (b),
(C) is a case where there is no intersection Q on the line segments S1 and S2.
(D) and (e) are the cases where the angle is 90 degrees or more and 180 degrees or less, and (d) where the intersection point Q is on the line segments S1 and S2,
(E) is a case where there is no intersection Q on the line segment S1.
【００１５】まず、図３（ａ）の場合について説明す
る。表示手段１は、画像サーバ（図示せず）から医療画
像データを取り出して、医療画像を表示する。医師は、
入力手段２（マウス等）により、医療画像上で、始点と
終点とを選択し、線分Ｓ１，Ｓ２を入力する。これによ
り、表示手段１は、線分Ｓ１，Ｓ２を表示する。First, the case of FIG. 3A will be described. The display unit 1 retrieves medical image data from an image server (not shown) and displays the medical image. Doctor
The input means 2 (mouse or the like) is used to select a start point and an end point on the medical image and input the line segments S1 and S2. As a result, the display unit 1 displays the line segments S1 and S2.
【００１６】交点算出手段３は、入力手段２により入力
された線分Ｓ１，Ｓ２の交点Ｑを算出する。距離算出手
段４は、線分Ｓ１，Ｓ２の交点Ｑで分割された分割線分
Ｓ１１，Ｓ１２，Ｓ２１，Ｓ２２の距離を算出する。つ
まり、交点Ｑからそれぞれの線分Ｓ１，Ｓ２の端点まで
の距離を算出する。そして、線分採用手段５は、距離算
出手段４の算出した距離により、線分Ｓ１，Ｓ２の分割
線分Ｓ１１，Ｓ１２，Ｓ２１，Ｓ２２の内、それぞれ長
い分割線分、つまり、分割線分Ｓ１１，Ｓ２１を採用す
る。この分割線分採用手段５で採用された分割線分Ｓ１
１，Ｓ２１より、角度算出手段６は、例えば下記の式に
より、角度ａを算出する。なお、分割線分Ｓ１１，Ｓ２
１のベクトルの方向は、交点Ｑから端点へ向かうベクト
ルである。The intersection calculating means 3 calculates the intersection Q of the line segments S1 and S2 input by the input means 2. The distance calculating means 4 calculates the distance of the dividing line segments S11, S12, S21, S22 divided at the intersection Q of the line segments S1, S2. That is, the distance from the intersection Q to the end points of the line segments S1 and S2 is calculated. Then, the line segment adoption means 5 uses the distance calculated by the distance calculation means 4 to divide each of the divided line segments S11, S12, S21, and S22 into long ones, that is, the divided line segment S11. , S21 are adopted. The dividing line segment S1 adopted by the dividing line segment adopting means 5
From 1, S21, the angle calculation means 6 calculates the angle a by the following formula, for example. The dividing line segments S11 and S2
The direction of the vector of 1 is the vector from the intersection Q to the end point.
【００１７】[0017]
【数１】 [Equation 1]
【００１８】次に図３（ｂ）の場合について説明する。
表示手段１，入力手段２までは、図３（ａ）と同じで、
交点算出手段３は、線分Ｓ１，Ｓ２が交わらないので、
どちらか一方、または、両方の線分Ｓ１，Ｓ２を延長し
て、交点Ｑを算出する。この場合は、線分Ｓ２を延長し
て、交点Ｑを算出する。距離算出手段４は、線分Ｓ１，
Ｓ２の交点Ｑで分割された分割線分Ｓ１１，Ｓ１２，Ｓ
２１，Ｓ２２の距離を算出する。ここで、分割線分Ｓ２
１，Ｓ２２は、それぞれ交点Ｑから線分Ｓ２の端点まで
の線分である。線分採用手段５は、距離算出手段４が算
出した距離より、線分Ｓ１，Ｓ２の分割線分Ｓ１１，Ｓ
１２，Ｓ２１，Ｓ２２の内、長い分割線分、分割線分Ｓ
１１，Ｓ２１を採用する。この線分採用手段５で採用さ
れた分割線分Ｓ１１，２１とにより、角度算出手段６
は、角度ａを算出する。Next, the case of FIG. 3B will be described.
The display means 1 and the input means 2 are the same as those in FIG.
Since the intersection point calculating means 3 does not intersect the line segments S1 and S2,
One or both of the line segments S1 and S2 are extended to calculate the intersection point Q. In this case, the line segment S2 is extended and the intersection point Q is calculated. The distance calculation means 4 uses the line segment S1,
Division line segments S11, S12, S divided at the intersection Q of S2
21 and S22 are calculated. Here, the dividing line segment S2
Reference numerals 1 and S22 are line segments from the intersection Q to the end points of the line segment S2. The line segment adoption means 5 uses the distance calculated by the distance calculation means 4 to divide the line segments S1 and S2 into the divided line segments S11 and S.
Among 12, S21, S22, the long segment line segment, the segment line segment S
11 and S21 are adopted. The angle calculating means 6 is obtained by the dividing line segments S11 and 21 adopted by the line adopting means 5.
Calculates the angle a.
【００１９】そして、図３（ｃ）〜（ｅ）の場合につい
て説明する。それぞれ上記と同様の動作を行い、図３
（ｃ）の場合は、分割線分Ｓ１１，Ｓ２１により、角度
ａを求め、図３（ｄ），（ｅ）の場合は、分割線分Ｓ１
２，Ｓ２１で角度ａを求める。The case of FIGS. 3C to 3E will be described. The same operation as above is performed, respectively, and FIG.
In the case of (c), the angle a is obtained from the dividing line segments S11 and S21, and in the cases of FIGS. 3D and 3E, the dividing line segment S1.
2, the angle a is obtained in S21.
【００２０】このように、交点算出手段３により、二つ
の線分Ｓ１，Ｓ２の交点Ｑを求め、距離算出手段４が、
線分Ｓ１，Ｓ２が交点Ｑにより分割された分割線分を求
め、線分採用手段５が、分割線分の長い方を選ぶ。これ
らの分割線分により、角度算出手段６が、角度を算出す
る。このため、必要な角度だけ算出できる。つまり、医
師は、容易に角度計測ができ、負担を軽減することがで
きる。In this way, the intersection calculating means 3 obtains the intersection Q of the two line segments S1 and S2, and the distance calculating means 4
A dividing line segment obtained by dividing the line segments S1 and S2 at the intersection point Q is obtained, and the line segment adopting means 5 selects the longer dividing line segment. The angle calculation means 6 calculates an angle from these dividing line segments. Therefore, only the required angle can be calculated. That is, the doctor can easily measure the angle and reduce the burden.
【００２１】また、交点算出手段３が、線分を延長して
交点を求めるので、線分が交わらなくとも角度の計測が
できると共に、医療画像上に交点がなくとも、角度を計
測することができる。つまり、医師は、医療画像上に、
ただ線分をひけば、角度を求めることができ、容易に角
度計測ができる。Since the intersection calculating means 3 obtains the intersection by extending the line segment, the angle can be measured without the intersection of the line segments and the angle can be measured without the intersection on the medical image. it can. In other words, the doctor, on the medical image,
However, if you draw a line segment, you can calculate the angle and easily measure the angle.
【００２２】[0022]
【発明の効果】本発明によれば、以下のような効果があ
る。請求項１によれば、交点算出手段により、二つの線
分の交点を求め、距離算出手段が、線分が交点により分
割された分割線分を求め、線分採用手段が、分割線分の
長い方を選ぶ。これらの分割線分により、角度算出手段
が、角度を算出する。このため、必要な角度だけ算出で
きる。つまり、医師は、容易に角度計測ができ、負担を
軽減することができる。The present invention has the following effects. According to claim 1, the intersection calculating means obtains an intersection of two line segments, the distance calculating means obtains a dividing line segment obtained by dividing the line segment by the intersection, and the line adopting means gives the dividing line segment. Choose the longer one. The angle calculation means calculates an angle from these dividing line segments. Therefore, only the required angle can be calculated. That is, the doctor can easily measure the angle and reduce the burden.
【００２３】請求項２によれば、交点算出手段が、線分
を延長して交点を求めるので、線分が交わらなくとも角
度の計測ができると共に、医療画像上に交点がなくと
も、角度を計測することができる。つまり、医師は、医
療画像上に、ただ線分をひけば、角度を求めることがで
き、容易に角度計測ができる。According to the second aspect, since the intersection calculating means extends the line segment to obtain the intersection, the angle can be measured without the intersection of the line segments, and the angle can be calculated without the intersection on the medical image. It can be measured. That is, the doctor can obtain the angle by simply drawing the line segment on the medical image, and the angle can be easily measured.
【００２４】[0024]
【００２５】[0025]
【図１】本発明の一実施例を示した構成図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention.
【図２】図１に示した装置の動作を示したフローチャー
トである。FIG. 2 is a flowchart showing an operation of the apparatus shown in FIG.
【図３】図１に示す装置の動作説明図である。FIG. 3 is an operation explanatory diagram of the apparatus shown in FIG.
【図４】従来の医療画像の角度計測装置を説明する図で
ある。FIG. 4 is a diagram illustrating a conventional medical image angle measuring device.
【図５】従来の他の医療画像の角度計測装置を説明する
図である。FIG. 5 is a diagram illustrating another conventional angle measuring device for medical images.
３ 交点算出手段 ４ 距離算出手段 ５ 線分採用手段 ６ 角度算出手段 3 intersection calculation means 4 Distance calculation means 5 Line segment adoption means 6 Angle calculation means
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G06T 1/00 290 A61B 6/00 G01B 11/26 G06T 11/00 G06F 17/50 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) G06T 1/00 290 A61B 6/00 G01B 11/26 G06T 11/00 G06F 17/50
Claims (2)
計測する医療画像の角度計測装置であって、 前記二つの線分の交点を算出する交点算出手段と、 この交点算出手段の交点で分割された分割線分の距離を
算出する距離算出手段と、 この距離算出手段の算出した距離により、前記線分の分
割線分の内、それぞれ長い分割線分を採用する線分採用
手段と、 この線分採用手段で採用された分割線分のなす角度を算
出する角度算出手段とを有することを特徴とする医療画
像の角度計測装置。1. A medical image angle measuring device for measuring an angle between two line segments shown in a medical image, comprising: an intersection point calculating means for calculating an intersection point of the two line segments; Distance calculating means for calculating the distance of the dividing line segment divided at the intersection, and line segment adopting means for adopting a long dividing line segment among the dividing line segments by the distance calculated by the distance calculating means. And an angle calculating device for calculating an angle formed by the dividing line segment adopted by the line segment adopting device.
は、線分を延長して交点を求め、交点から線分の端点ま
でを分割線分とすることを特徴とする請求項１記載の医
療画像の角度計測装置。2. The intersection calculating means, when the intersection is not on a line segment, extends the line segment to obtain the intersection, and sets the segment from the intersection to the end point of the line segment as a dividing line segment. 1. The medical image angle measuring device according to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30685298A JP3534174B2 (en) | 1998-10-28 | 1998-10-28 | Angle measuring device for medical images |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30685298A JP3534174B2 (en) | 1998-10-28 | 1998-10-28 | Angle measuring device for medical images |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000132667A JP2000132667A (en) | 2000-05-12 |
| JP3534174B2 true JP3534174B2 (en) | 2004-06-07 |
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ID=17962035
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30685298A Expired - Lifetime JP3534174B2 (en) | 1998-10-28 | 1998-10-28 | Angle measuring device for medical images |
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| Country | Link |
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| JP (1) | JP3534174B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001090875A1 (en) * | 2000-05-24 | 2001-11-29 | Koninklijke Philips Electronics N.V. | Immediate mouse control of measuring functionalities for medical images |
| EP1498849A3 (en) | 2003-07-07 | 2006-07-19 | Canon Kabushiki Kaisha | Image display apparatus, image display method, and program |
| JP4328586B2 (en) | 2003-09-02 | 2009-09-09 | キヤノン株式会社 | Radiation image connection processing method, radiation image connection processing apparatus, computer program, and computer-readable recording medium |
| EP1709521B1 (en) * | 2004-01-19 | 2015-04-08 | Koninklijke Philips N.V. | Method and apparatus providing flexible measurement functionality for medical images |
| EP1657681B1 (en) * | 2004-11-10 | 2009-01-21 | Agfa HealthCare NV | Method of performing measurements on digital images |
| JP2006192104A (en) * | 2005-01-14 | 2006-07-27 | Konica Minolta Medical & Graphic Inc | Image measuring device and image measuring method |
| JP4973556B2 (en) * | 2008-03-18 | 2012-07-11 | コニカミノルタエムジー株式会社 | Image measuring apparatus, medical image system, and program |
| CN103256902A (en) * | 2013-05-08 | 2013-08-21 | 中国科学院上海光学精密机械研究所 | Method of measuring included angle between two laser beams |
-
1998
- 1998-10-28 JP JP30685298A patent/JP3534174B2/en not_active Expired - Lifetime
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|---|---|
| JP2000132667A (en) | 2000-05-12 |
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