JPH0640347B2 - Image composition method - Google Patents
Image composition methodInfo
- Publication number
- JPH0640347B2 JPH0640347B2 JP58055076A JP5507683A JPH0640347B2 JP H0640347 B2 JPH0640347 B2 JP H0640347B2 JP 58055076 A JP58055076 A JP 58055076A JP 5507683 A JP5507683 A JP 5507683A JP H0640347 B2 JPH0640347 B2 JP H0640347B2
- Authority
- JP
- Japan
- Prior art keywords
- image
- region
- images
- interest
- priority
- 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
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Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three-dimensional [3D] modelling for computer graphics
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Graphics (AREA)
- Geometry (AREA)
- Software Systems (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Image Processing (AREA)
- Controls And Circuits For Display Device (AREA)
Description
【発明の詳細な説明】 〔発明の利用分野〕 本発明は、コンピュータを利用した医用デジタル画像処
理に関するもので、Ｘ線ＣＴ画像とＮＭＲ−ＣＴ画像あ
るいはポジトロンＣＴ画像といつた異種画像処理あるい
は造影剤注入前後のＸ線画像処理における時間的異種画
像処理に用いる。Description: FIELD OF THE INVENTION The present invention relates to a digital medical image processing using a computer, and is a heterogeneous image processing or contrasting with an X-ray CT image and an NMR-CT image or a positron CT image. It is used for temporal heterogeneous image processing in X-ray image processing before and after agent injection.
従来の異種画像の組合せ表示には下記のものがある。 The conventional combined display of different images is as follows.
カラー組合せ表示 モノクロ単純合成 のカラー組合せ表示は、各画像毎にＲ，Ｇ，Ｂ，いづ
れかの色を割り当て、同時に表示しようとするものであ
る。この方式は色が３色しかないため３種類までの組合
せに限られる他、濃度が重なつた領域で色が変化するた
めに見にくくなる。Color combination display In monochrome simple combination color combination display, R, G, B, or any one of the colors is assigned to each image and the images are displayed at the same time. This method is limited to combinations of up to three types because there are only three colors, and it is difficult to see because the colors change in areas where the densities overlap.
のモノクロ単純合成は、ある１枚の画像に注目し、そ
の画像をベースに、他の画像のある特定の範囲の濃度の
領域を埋め込んで、１枚の画像を合成しようとするもの
である。今、Ｘ−ＣＴ画像とＮＭＲ−ＣＴ画像の合成の
例をあげて説明する。In the monochrome simple combination, the attention is paid to one image, and the image is used as a base for embedding a region having a density in a certain range of another image to combine the images. Now, an example of synthesizing the X-CT image and the NMR-CT image will be described.
ＮＭＲ−ＣＴ画像は、体内における水素の密度分布およ
び緩和時間（生物化学的状態に関する情報の１種）を２
次元画像信号として示したものである。特に緩和時間
は、悪性腫瘍と正常細胞の間で顕著な差があることが実
験で確認されつつあり、ガン診断への貢献が期待されて
いる。The NMR-CT image shows the density distribution of hydrogen in the body and the relaxation time (one kind of information on biochemical state).
It is shown as a three-dimensional image signal. Especially, the relaxation time is being confirmed experimentally that there is a significant difference between malignant tumors and normal cells, and it is expected to contribute to cancer diagnosis.
一方、Ｘ−ＣＴ画像は、Ｘ線吸収係数分布を画像したも
のである。骨の位置など形態学的情報を有し、診断に有
効であるが、軟部組織で濃度差があまりなく初期段階で
の小さな悪性腫瘍の診断には難があつた。On the other hand, the X-CT image is an image of the X-ray absorption coefficient distribution. It has morphological information such as bone position and is effective for diagnosis, but there was not much difference in concentration in soft tissues, and it was difficult to diagnose small malignant tumors in the early stage.
そこで、Ｘ−ＣＴの形態学的情報とＮＭＲ−ＣＴの生化
学的情報を組合せることによつて新たな診断情報を得る
ことが可能となる。たとえば次のような情報を合成す
る。Therefore, it becomes possible to obtain new diagnostic information by combining the morphological information of X-CT and the biochemical information of NMR-CT. For example, the following information is synthesized.
Ｘ−ＣＴ…骨の位置情報 ＮＭＲ−ＣＴ…軟部組織及び悪性腫瘍の生化学情報 この時、Ｘ−ＣＴ画像から骨情報を抽出して、ＮＭＲ−
ＣＴ画像に埋め込むと、骨と悪性腫瘍部が重つていた時
に、もつとも重要な腫瘍部情報が失われる。また逆に、
ＮＭＲ−ＣＴ画像から腫瘍部だけを抽出してＸ−ＣＴ画
像に埋め込むと、腫瘍部以外の軟部組織の生化学的情報
が失われてしまう。X-CT ... Bone position information NMR-CT ... Soft tissue and malignant tumor biochemical information At this time, bone information is extracted from the X-CT image to obtain NMR-
When embedding in a CT image, when the bone and the malignant tumor part overlap, the important tumor part information is lost. On the contrary,
When only the tumor part is extracted from the NMR-CT image and embedded in the X-CT image, the biochemical information of the soft tissue other than the tumor part is lost.
このように従来の単純な合成では、両画像の相補的な情
報をうまく組合せることができなかつた。Thus, in the conventional simple synthesis, complementary information of both images could not be combined well.
２つ以上の異なる画像収集手段によつて得られた画像間
あるいは、同じ画像収集手段ではあるが時間的に異なる
画像間で、それぞれの画像に含まれる特有の情報を抽出
して合成することによつて１枚あるいは１種類の画像か
らは得られない相補的な情報を引き出す手法を提供する
ことにある。To extract and combine peculiar information contained in each image between images obtained by two or more different image collecting means or between images obtained by the same image collecting means but temporally different from each other. Therefore, it is to provide a method of extracting complementary information that cannot be obtained from one image or one type of image.
各画像それぞれに、任意の個数のウインドウを設けて各
画像の関心領域とそれ以外の領域に分離する。そして、
各画像の関心領域に優先度を設けてすべて表示するとと
もに、各画像の関心領域に含まれない領域に関しては、
例えば最初に分離した非関心領域画像の中の任意の１枚
の画像の濃淡を表示できるようにする。Each image is provided with an arbitrary number of windows to separate the image into a region of interest and other regions. And
Areas of interest for each image are displayed with priority, and for areas not included in the area of interest for each image,
For example, it is possible to display the gray scale of any one image in the non-region-of-interest images that are initially separated.
以上の様に、ウインドウを複数個設け、かつ関心領域以
外の背景部分の関心領域と同様に自由に選択できるよう
にしたことにより各画像に含まれる情報を最大限に引き
出すことが可能となる。As described above, by providing a plurality of windows and allowing free selection as in the region of interest other than the region of interest, it is possible to maximize the information contained in each image.
以下実施例により本発明を具体的に説明する。第１図は
本発明の一実施例の構成を示すブロツク図である。１
は、各画像においてそれぞれ抽出すべき関心領域を設定
するパラメータなどの入力装置、２は合成対象となるオ
リジナル画像及び合成後の画像を格納する記憶装置、３
は、入力装置によつて設定されたパラメータに基づいて
各画像における関心領域と非関心領域を切り分け、画像
間の優先度により合成処理を行う計算機、４は、表示装
置であるが、ここでは合成画像１枚をモノクロで、ある
いは２枚の関心領域画像とそれ以外の領域画像をそれぞ
れRed,Blue,Greenの３色で表示するようになつている。The present invention will be specifically described below with reference to examples. FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. 1
Is an input device such as a parameter for setting a region of interest to be extracted in each image, 2 is a storage device for storing an original image to be combined and an image after combining, 3
Is a display device, which is a display device, although a calculator 4 which divides a region of interest and a non-region of interest in each image based on a parameter set by an input device and performs a combining process based on the priority between images is used. One image is displayed in monochrome, or two region-of-interest images and other region images are displayed in three colors of red, blue, and green, respectively.
以上の構成における本発明の実施方法を画像が２枚の場
合の例を取り、第１図、第２図、第３図を用いて以下に
説明する。The method for carrying out the present invention in the above configuration will be described below with reference to FIG. 1, FIG. 2, and FIG. 3, taking an example of the case of two images.
Step1：オリジナル画像Ｉ１の関心領域の濃度を入力装
置１より入力する。たとえば第２図の例では、関心領域
としてＩ１の斜線部分の濃度領域を抽出するものとす
る。その濃度は同図(3)に示したようにＧ１である。よ
つてあらかじめ定めたその前後の濃度（G1 d，G1 u）の範
囲（第２図(4)参照）がウインドウとなる。もし、さら
に他の濃度の領域も抽出したい場合は、同じように他の
ウインドウを設ける。Step1: To input from the input device 1 the concentration region of interest of the original image I 1. For example, in the example of FIG. 2, it is assumed that the shaded area of I 1 is extracted as the region of interest. Its concentration is G 1 as shown in FIG. Therefore, the range of concentrations (G 1 d , G 1 u ) before and after that (see Fig. 2 (4)) becomes the window. If it is desired to extract areas of other densities, another window is provided in the same manner.
Step2：前段で求めたウインドウに基づき、オリジナル
画像Ｉ１より関心領域ＲＩ１を抽出する（(2)参照）。
この時、同時に関心領域以外の領域Ｉ１を求めてお
く。Step2: Based on the window obtained in the previous stage, the region of interest R I1 is extracted from the original image I 1 (see (2)).
At this time, the region I1 other than the region of interest is obtained at the same time.
Step3：オリジナル画像Ｉ２に関してもStep1同様に、関
心領域の濃度を入力する。Step3: even Step1 similarly with respect to the original image I 2, and inputs the density of the region of interest.
Step4：前段で求めたウインドウに基づき、オリジナル
画像Ｉ２より関心領域ＲＩ２を抽出する。同じくＩ２
も求める。Step4: Based on the window obtained in the previous stage, the region of interest R I2 is extracted from the original image I 2 . Also I2
Also ask.
Step5：ＲＩ１とＲＩ２を加算した画像ＲＩを求める。Step 5: An image R I is obtained by adding R I1 and R I2 .
この際、ＲＩ１，ＲＩ２の領域が重なつている部分につ
いては加算せず、ＲＩ１濃度とする（若い番号の画像を
優先するものとする）。At this time, the portion in which the regions of R I1 and R I2 overlap is not added, but is set to the R I1 density (the image with the lower number has priority).
Step6：前段で求めた画像は、２枚の画像の関心領域の
み濃度を持ち、それ以外の領域の濃度は零の画像であ
る。そこで非関心領域の濃度として もしくはＩ２の濃度を与える。第２図の例の様に人体
の輪郭など画像Ｉ１の情報が要求されている場合には、
Ｉ１の濃度を与える。Step 6: The image obtained in the previous stage is an image in which only the regions of interest of the two images have densities and the other regions have zero densities. So as the density of the non-interested area Alternatively, the concentration of I2 is given. When information of the image I 1 such as the contour of the human body is requested as in the example of FIG. 2,
Give the concentration of I1 .
以上の処理で２枚の画像から目的とする１枚の画像第２
図(5)が合成される。３枚以上の画像から合成する場合
には、Step3，４を繰り返し、Step5で、すべての画像の
関心領域を加算すれば、同様に得られる。With the above processing, the desired one image from the two images
Figure (5) is synthesized. When synthesizing from three or more images, steps 3 and 4 are repeated, and in step 5, the regions of interest of all the images are added to obtain the same result.
また、上記処理において、Step2で得られたＲＩ１，Ste
p4で得られるＲＩ２の領域の内ＲＩ１に含まれない領
域、さらにStep6で与えた非関心領域、それぞれにRed,G
reen,Blue（あるいはその順序を入れかえたもの）の色
を割り当てることにより、注目する関心領域が背景色と
異つた色で表示することが可能である。In addition, in the above processing, R I1 , Ste obtained in Step 2 is
Of the regions of R I2 obtained by p4, the regions not included in R I1 and the non-interest regions given in Step 6, Red and G respectively
By assigning the colors of reen and blue (or the order in which they are changed), the region of interest of interest can be displayed in a color different from the background color.
以上１実施例により詳細に説明したが、以上の動作はコ
ンピユータを利用した処理システム，マイクロコンピユ
ータ応用システム、其他本発明の目的に合せて設計され
た専用処理装置等幅広い実現手段に適用可能である。As described above in detail with reference to the one embodiment, the above-described operation can be applied to a wide range of realization means such as a processing system using a computer, a micro computer application system, and a dedicated processing device designed for the purpose of the present invention. .
本発明によれば、同一部位を異なる画像収集手段あるい
は、同一収集手段ではあるが異なる時間に得た２枚以上
の画像を用いて、それぞれに含まれた特有の抽出して合
成することにより、従来の合成方法では不可能であつ
た、相補的な情報が得られる。According to the present invention, by using different image collecting means for the same region, or using two or more images obtained by the same collecting means at different times, by extracting and synthesizing uniquely contained in each, Complementary information is obtained, which was not possible with conventional synthesis methods.
第１図は、本発明の画像処理を実現するための実施例を
示すブロツク図、第２図は、本発明画像合成方式の概念
を示す説明図、第３図は、本発明実施例の画像処理手順
の一例を示す流れ図である。FIG. 1 is a block diagram showing an embodiment for realizing the image processing of the present invention, FIG. 2 is an explanatory view showing the concept of the image combining method of the present invention, and FIG. 3 is an image of the embodiment of the present invention. It is a flow chart which shows an example of a processing procedure.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 森下 孝一 神奈川県川崎市麻生区王禅寺1099番地 株 式会社日立製作所システム開発研究所内 (72)発明者 山縣 振武 神奈川県川崎市麻生区王禅寺1099番地 株 式会社日立製作所システム開発研究所内 (56)参考文献 特開 昭50−141223（ＪＰ，Ａ) 特開 昭55−22771（ＪＰ，Ａ) 特開 昭57−163292（ＪＰ，Ａ) 特開 昭55−148536（ＪＰ，Ａ) 特開 昭55−18745（ＪＰ，Ａ) 特開 昭57−687（ＪＰ，Ａ) 特開 昭57−196174（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Morishita 1099, Ozenji, Aso-ku, Kawasaki-shi, Kanagawa, Ltd. Inside the Hitachi, Ltd. Systems Development Laboratory (72) Inventor Yamagata, Senbu 1099, Ozen-ji, Aso-ku, Kawasaki, Kanagawa (56) Reference JP-A-50-141223 (JP, A) JP-A-55-22771 (JP, A) JP-A-57-163292 (JP, A) JP-A-55 -148536 (JP, A) JP-A-55-18745 (JP, A) JP-A-57-687 (JP, A) JP-A-57-196174 (JP, A)
Claims (5)
画像のそれぞれを関心領域と非関心領域の２個の領域に
分割し、画像内および画像間にまたがって各領域に一連
の優先度をつけ、画像間で領域が重なった部分では、優
先度の高い方の領域を優先して合成し、合成後の画像を
出力すること特徴とする画像合成方法。1. A plurality of images obtained by photographing the same target region are divided into two regions, a region of interest and a region of non-interest, and a series of priority is given to each region within the image and between the images. An image synthesizing method characterized in that a region having a higher priority is preferentially synthesized in a portion where regions overlap with each other, and the synthesized image is output.
る撮影方法で撮影した画像である特許請求の範囲第１項
記載の画像合成方法。2. The image synthesizing method according to claim 1, wherein the plurality of images are images obtained by photographing the same target region by different photographing methods.
の撮影方法で異なる時間に撮影した画像である特許請求
の範囲第１項記載の画像合成方法。3. The image synthesizing method according to claim 1, wherein the plurality of images are images of the same target portion taken at different times by the same shooting method.
とに異なる色を割り当てて表示する処理からなる特許請
求の範囲第１項記載の画像合成方法。4. The image synthesizing method according to claim 1, wherein the outputting process comprises a process of assigning a different color to each divided area and displaying the color.
先度のもっとも高い領域を画像間の優先度に基づいて合
成した後、いずれか１枚の画像の未合成領域を用いて残
りの領域を合成する処理からなる特許請求の範囲第１項
記載の画像合成方法。5. The synthesizing process comprises synthesizing a region having the highest priority in each image on the basis of the priority between images, and then using the unsynthesized region of any one of the images for the remaining region. The image synthesizing method according to claim 1, which comprises a process of synthesizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58055076A JPH0640347B2 (en) | 1983-04-01 | 1983-04-01 | Image composition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58055076A JPH0640347B2 (en) | 1983-04-01 | 1983-04-01 | Image composition method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59183459A JPS59183459A (en) | 1984-10-18 |
| JPH0640347B2 true JPH0640347B2 (en) | 1994-05-25 |
Family
ID=12988608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58055076A Expired - Lifetime JPH0640347B2 (en) | 1983-04-01 | 1983-04-01 | Image composition method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0640347B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001291091A (en) * | 2000-01-31 | 2001-10-19 | Mitsubishi Electric Corp | Image processing apparatus and method |
| JP2026008518A (en) * | 2024-06-27 | 2026-01-19 | 群創光電股▲ふん▼有限公司 | Medical image display method and electronic device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62197874A (en) * | 1986-02-25 | 1987-09-01 | Photo Composing Mach Mfg Co Ltd | Image processor |
| JPH0831128B2 (en) * | 1989-04-25 | 1996-03-27 | テルモ株式会社 | Image processing device |
| JP4558645B2 (en) * | 2003-04-04 | 2010-10-06 | 株式会社日立メディコ | Image display method and apparatus |
| WO2012011028A1 (en) * | 2010-07-22 | 2012-01-26 | Koninklijke Philips Electronics N.V. | Fusion of multiple images |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516318B2 (en) * | 1974-04-30 | 1980-05-01 | ||
| JPS5522771A (en) * | 1978-08-08 | 1980-02-18 | Nippon Electric Co | Image quntizing device |
-
1983
- 1983-04-01 JP JP58055076A patent/JPH0640347B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001291091A (en) * | 2000-01-31 | 2001-10-19 | Mitsubishi Electric Corp | Image processing apparatus and method |
| JP2026008518A (en) * | 2024-06-27 | 2026-01-19 | 群創光電股▲ふん▼有限公司 | Medical image display method and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59183459A (en) | 1984-10-18 |
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