JPH03236830A - Image display device - Google Patents
Image display deviceInfo
- Publication number
- JPH03236830A JPH03236830A JP2031527A JP3152790A JPH03236830A JP H03236830 A JPH03236830 A JP H03236830A JP 2031527 A JP2031527 A JP 2031527A JP 3152790 A JP3152790 A JP 3152790A JP H03236830 A JPH03236830 A JP H03236830A
- Authority
- JP
- Japan
- Prior art keywords
- signal value
- window
- roi
- interest
- window level
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 7
- 230000006870 function Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002595 magnetic resonance imaging Methods 0.000 description 3
- 210000003127 knee Anatomy 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
- Image Processing (AREA)
- Image Analysis (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的コ
（産業上の利用分野）
本発明は、例えば磁気共鳴イメージング撮影装置（以下
ＭＨＩ装置という）で得られた再構成画像を表示する画
面上でウィンドウレベル及びウィンドウ幅を調整可能と
した画像表示装置に関し、特にそのウィンドウレベル及
びウィンドウ幅を調節する機構の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention (Industrial Field of Application) The present invention provides a method for displaying a window level image on a screen displaying a reconstructed image obtained by, for example, a magnetic resonance imaging apparatus (hereinafter referred to as an MHI apparatus). The present invention also relates to an image display device in which the window width can be adjusted, and particularly to improvements in the mechanism for adjusting the window level and window width.
（従来の技術）
従来、この種の画像表示装置においては、ウィンドウレ
ベル調整を画面全体に対して行うものであった。(Prior Art) Conventionally, in this type of image display device, window level adjustment has been performed for the entire screen.
（発明が解決しようとする課題）
係る従来のこの種の画像表示装置によりウィンドウレベ
ル調整を行うと、画面全体のウィンドウレベルが変動し
、しかも基準となるウィンドウレベルは設定できなかっ
た。(Problems to be Solved by the Invention) When window level adjustment is performed using this type of conventional image display device, the window level of the entire screen fluctuates, and furthermore, a reference window level cannot be set.
従って、従来の場合においては、診断土兄たい画面上の
特定領域つまり親心領域（以下ＲＯＩという）を目標と
したウィンドウレベル及びウィンドウ幅を調整する作業
が煩わしく、また所望通りに調整することが難しいとい
う不具合があった。Therefore, in the conventional case, it is troublesome to adjust the window level and window width targeting a specific area on the diagnostic screen, that is, the ROI (hereinafter referred to as ROI), and it is difficult to adjust it as desired. There was a problem.
本発明は、上記の課題に鑑みてなされたものであり、そ
の目的とするところは、ＲＯＩのウィンドウレベル及び
ウィンドウ幅を迅速且つ正確に設定することができる画
像表示装置を提供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to provide an image display device that can quickly and accurately set the window level and window width of an ROI.
［発明の構成］
（課題を解決するための手段）
本発明は、上記の目的を達成するため、画面上でＲＯＩ
が指定される毎に、該ＲＯＩの最大信号値及び最小信号
値を演算により求める信号値検出手段と、前記ＲＯＩ内
の任意の関心部が指定される毎に、該関心部が示すウィ
ンドウレベルを設定し、同時に設定したウィンドウレベ
ルを中心として前記ＲＯＩの最大信号値及び最小信号値
を基にウィンドウ幅を設定するウィンドウ幅設定手段と
を備えたことを特徴とするものである。[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides ROII on the screen.
Each time an ROI is designated, a signal value detection means calculates the maximum signal value and minimum signal value of the ROI, and each time an arbitrary region of interest within the ROI is designated, a window level indicated by the region of interest is determined. and window width setting means for setting a window width based on the maximum signal value and minimum signal value of the ROI with the window level set at the same time as the center.
（作用）
本発明による画像表示装置の構成であれば、画面上でＲ
ＯＩが指定され、ＲＯＩの任意の関心部が指定される毎
に、そのＲＯＩ内の任意の関心部を中心点としたウィン
ドウレベルをウィンドウ設定手段により設定することが
できる。同時に信号値検出手段により求めたＲＯＩの最
大信号値及び最小信号値を基にウィンドウ設定手段によ
り上記のウィンドウレベルを中心としてＲｏｔのウィン
ドウ幅を設定することができる。従って、ＲＯＩを目標
としてウィンドウレベル及びウィンドウ幅を所望通りに
迅速且つ正確に設定することができ、これにともない設
定したウィンドウ幅で画面上の画像表示の濃淡を簡単且
つ正確に調整できる。(Function) With the configuration of the image display device according to the present invention, R
Each time an OI is designated and an arbitrary region of interest in the ROI is designated, a window level can be set by the window setting means with the arbitrary region of interest within the ROI as the center point. At the same time, the window width of the Rot can be set using the window setting means based on the maximum signal value and minimum signal value of the ROI determined by the signal value detection means, with the above-mentioned window level as the center. Therefore, the window level and window width can be set quickly and accurately as desired with the ROI as a target, and accordingly, the shading of the image display on the screen can be easily and accurately adjusted using the set window width.
（実施例）
第１図は、本発明が適用された一実施例の画像表示装置
の概略を示すブロック図である。(Embodiment) FIG. 1 is a block diagram schematically showing an image display device according to an embodiment to which the present invention is applied.
この一実施例の画像表示装置は、システム全体の制御中
枢となるＣＰＵＩ、メモリ２、デイスプレィプロセッサ
３、キーボード４、表示器５を備えている。そして、Ｃ
ＰＵＩは信号値検出手段６及びウィンドウ設定手段７の
各機能を有している。The image display device of this embodiment includes a CPUI serving as a control center for the entire system, a memory 2, a display processor 3, a keyboard 4, and a display 5. And C
The PUI has the functions of a signal value detection means 6 and a window setting means 7.
ＣＰＵＩにおいて、信号値検出手段６は、表示器５の画
面上てＲＯＩがキーボード４の操作により指定される毎
に、指定されたＲＯＩの最大信号値及び最小信号値を検
出する。In the CPUI, the signal value detection means 6 detects the maximum signal value and minimum signal value of the designated ROI every time the ROI is designated on the screen of the display 5 by operating the keyboard 4.
ウィンドウ設定手段７は、上記ＲＯＩ内の任意の関心部
がキーボード４の操作により指定される毎に、その関心
部が示すウィンドウレベルを設定し、同時に設定し゛た
ウィンドウレベルを中心としてＲＯＩの最大信号値及び
その最小信号値を基にウィンドウ幅を設定する。The window setting means 7 sets the window level indicated by the region of interest each time an arbitrary region of interest within the ROI is specified by operating the keyboard 4, and simultaneously sets the maximum signal of the ROI around the set window level. Set the window width based on the value and its minimum signal value.
このような各部を備えた一実施例の画像表示装置をＭＨ
Ｉ装置に適用した場合、以下のように画質改善を行えた
。An image display device of one embodiment equipped with such various parts is called MH.
When applied to the I device, the image quality could be improved as shown below.
スピンエコー法（ＳＥ法）により被検体の膝を磁気共鳴
イメージング撮影として第２図に示す如く膝を画像表示
する場合を例にとる。Let us take as an example a case where the knee of a subject is imaged by magnetic resonance imaging using the spin echo method (SE method) as shown in FIG. 2.
通常、ＳＥ法による画像では、骨部は光ってしまい、そ
の信号値を落とそうとすると、他の部分の信号値まで減
らしてしまう。Normally, in images obtained by the SE method, bone parts shine, and if you try to reduce their signal values, the signal values of other parts will also be reduced.
そこで、本実施例では、第３図に示す如く処理フローに
従って、ウィンドウレベル及びウィンドウ幅を設定し自
動的に関数で補間してレベル調整を行った。Therefore, in this embodiment, the window level and window width are set according to the processing flow as shown in FIG. 3, and level adjustment is performed by automatically interpolating with a function.
まず、膝のじん帯をみる時などでは、第２図における○
印で示す円形ＲＯＩを置くと（ステップ３０１）、信号
値検出手段６によりＲＯＩの最大信号値（ＭＡＸ）及び
最小信号値ＣＭＩＮ＞が求まる（ステップ３０２）。こ
のとき、特に見たい所があれば（ステップ３０３肯定）
、ステップ３０４以降に進み、なければ（ステップ３０
３否定）ステップ３０６に進む。First of all, when looking at the knee ligaments,
When a circular ROI indicated by a mark is placed (step 301), the maximum signal value (MAX) and minimum signal value CMIN> of the ROI are determined by the signal value detection means 6 (step 302). At this time, if there is a place you particularly want to see (step 303 affirmative)
, proceed to step 304 and after, and if not (step 30
3 (No) Proceed to step 306.
ステップ３０４に進み、第２図における十印で示す関心
部を置くと、ウィンドウレベルに対応する信号値をウィ
ンドウ設定手段７が検出し、これを中心値とする設定が
なされる。同時に設定したウィンドウレベルを中心とし
てＲＯＩの最大信号値（ＭＡＸ）及びその最小信号値（
Ｍ Ｉ Ｎ）を基にウィンドウ幅の設定がなされ、その
ウィンドウ幅間を関数で補間する処理がなされる（ステ
ップ３０５、第４図参照）。また、ステップ３０６に進
むと、ステップ３０５同様にウィンドウ幅の設定がなさ
れ、そのウィンドウ幅間を関数で補間処理がなされる。Proceeding to step 304, when the region of interest indicated by the cross mark in FIG. 2 is placed, the window setting means 7 detects a signal value corresponding to the window level and sets this as the center value. The maximum signal value (MAX) of ROI and its minimum signal value (MAX) centering on the window level set at the same time.
The window width is set based on M I N), and processing is performed to interpolate between the window widths using a function (step 305, see FIG. 4). Further, when the process proceeds to step 306, the window width is set as in step 305, and interpolation processing is performed between the window widths using a function.
従って、ＲＯＩを目標としてウィンドウレベル及びウィ
ンドウ幅を所望通りに迅速且つ正確に設定することがで
き、これにともない設定したウインドウ幅で画面上の画
像表示の濃淡を簡単且つ正確に行うことができる。Therefore, the window level and window width can be set quickly and accurately as desired with ROI as the target, and accordingly, the shading of the image display on the screen can be easily and accurately performed using the set window width.
なお、本実施例では円形ＲＯＩを用いたか、矩形、任意
形状のＲＯＩを用いてもよく、またＲＯＩ内の関心部を
十印で示したが、これは単に関心部の中心位置を例示し
たものである。In this example, a circular ROI was used, or a rectangular or arbitrary-shaped ROI may be used.Also, the region of interest within the ROI is indicated by a cross, but this is merely an example of the center position of the region of interest. It is.
［発明の効果］
以上説明したように、本発明によれば画面上でＲＯＩ及
びＲＯＩ内の関心部を指定する操作を行うたけで、ＲＯ
Ｉのウィンドウレベル及びウィンドウ幅を自動設定する
ことができるから、画面上の画質表示の濃淡調整を簡単
且つ確実に行うことができた。[Effects of the Invention] As explained above, according to the present invention, by simply performing the operation of specifying the ROI and the region of interest within the ROI on the screen, the ROI can be adjusted.
Since the window level and window width of I can be automatically set, it is possible to easily and reliably adjust the shading of the image quality displayed on the screen.
第１図は本発明が適用された一実施例の画像表示装置の
概略を示すブロック図、第２図はＭＲＩ装置で得られた
再構画像を表示した状態を示す図、第３図は本発明の一
実施例の処理状況を示すフローチャート、第４図はウィ
ンドウレベル及びウィンドウ幅を設定して補間した特性
を示す図である。
１・・・ＣＰＵ ２・・・メモリ３・・・
デイスプレィプロセッサ
４・・・キーボード ５・・・表示器６・・・信号
値検出手段
７・・・ウィンドウ設定手段FIG. 1 is a block diagram showing an outline of an image display device according to an embodiment of the present invention, FIG. 2 is a diagram showing a state in which a reconstructed image obtained by an MRI apparatus is displayed, and FIG. FIG. 4 is a flowchart showing the processing status of an embodiment of the invention, and is a diagram showing interpolated characteristics by setting the window level and window width. 1...CPU 2...Memory 3...
Display processor 4...Keyboard 5...Display device 6...Signal value detection means 7...Window setting means
Claims (1)
の最大信号値及びその最小信号値を演算により求める信
号値検出手段と、 前記関心領域内の任意の関心部が指定される毎に、該関
心部が示すウィンドウレベルを設定し、同時に設定した
ウィンドウレベルを中心として前記関心領域の最大信号
値及びその最小信号値を基にウィンドウ幅を設定するウ
ィンドウ設定手段とを備えたことを特徴とする画像表示
装置。(1) Every time a region of interest is specified on the screen, a signal value detection means for calculating the maximum signal value and minimum signal value of the region of interest, and an arbitrary part of interest within the region of interest is specified. and a window setting means for setting a window level indicated by the region of interest for each region of interest, and setting a window width based on the maximum signal value and the minimum signal value of the region of interest centering on the simultaneously set window level. An image display device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2031527A JPH0616767B2 (en) | 1990-02-14 | 1990-02-14 | Image display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2031527A JPH0616767B2 (en) | 1990-02-14 | 1990-02-14 | Image display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03236830A true JPH03236830A (en) | 1991-10-22 |
| JPH0616767B2 JPH0616767B2 (en) | 1994-03-09 |
Family
ID=12333665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2031527A Expired - Lifetime JPH0616767B2 (en) | 1990-02-14 | 1990-02-14 | Image display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0616767B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2005117712A1 (en) * | 2004-06-03 | 2008-04-03 | 株式会社日立メディコ | Image diagnosis support method and image diagnosis support device |
| JP2009050615A (en) * | 2007-08-29 | 2009-03-12 | Ge Medical Systems Global Technology Co Llc | Magnetic resonance imaging apparatus and magnetic resonance image displaying method |
| WO2014104212A1 (en) * | 2012-12-26 | 2014-07-03 | 株式会社 東芝 | Medical image diagnosis device |
| WO2015052919A1 (en) * | 2013-10-11 | 2015-04-16 | 富士フイルム株式会社 | Medical image processing device and operation method therefore, and medical image processing program |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2005117712A1 (en) * | 2004-06-03 | 2008-04-03 | 株式会社日立メディコ | Image diagnosis support method and image diagnosis support device |
| US8355775B2 (en) | 2004-06-03 | 2013-01-15 | Hitachi Medical Corporation | Image diagnosing support method and image diagnosing support apparatus |
| JP2009050615A (en) * | 2007-08-29 | 2009-03-12 | Ge Medical Systems Global Technology Co Llc | Magnetic resonance imaging apparatus and magnetic resonance image displaying method |
| WO2014104212A1 (en) * | 2012-12-26 | 2014-07-03 | 株式会社 東芝 | Medical image diagnosis device |
| JP2014140679A (en) * | 2012-12-26 | 2014-08-07 | Toshiba Corp | Medical image diagnostic apparatus |
| WO2015052919A1 (en) * | 2013-10-11 | 2015-04-16 | 富士フイルム株式会社 | Medical image processing device and operation method therefore, and medical image processing program |
| JP2015073832A (en) * | 2013-10-11 | 2015-04-20 | 富士フイルム株式会社 | Medical image processor, operation method thereof and medical image processing program |
| US9947094B2 (en) | 2013-10-11 | 2018-04-17 | Fujifilm Corporation | Medical image processing device, operation method therefor, and medical image processing program |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0616767B2 (en) | 1994-03-09 |
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