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vue 使用cornerstonejs展示 DICOM影像数据

作者:互联网

cornerstone 库地址

可能访问失败,建议翻墙使用

需要用到的依赖库,可 npm 可自行加入项目public 文件夹中,这里提供文件下载

点此下载 密码: tcg3

注意(坑)

cornerstoneWADOImageLoader.js 文件中需要自行修改 path 路径(注意:是绝对路径哦),大概在 1750 行。当时卡了好久。

var defaultConfig = {
  maxWebWorkers: navigator.hardwareConcurrency || 1,
  startWebWorkersOnDemand: true,
  webWorkerPath: '/models/js/cornerstoneWADOImageLoaderWebWorker.js',//此路径需要自行修改
  webWorkerTaskPaths: [],
  taskConfiguration: {
    decodeTask: {
      loadCodecsOnStartup: true,
      initializeCodecsOnStartup: false,
      codecsPath: '/models/js/cornerstoneWADOImageLoaderCodecs.js',//此路径需要自行修改
      usePDFJS: false,
      strict: options.strict
    }
  }
};

写在前面

我只介绍了 cornerstone 的一些基本用法,具体如何在项目中应用,还是要灵活使用,例如我在项目中使用是先通过递归来缓存了所有的图像再逐个展示,节省了加载的时间;通过算法分析的结节坐标信息在图像上绘制结节等。如果需要帮助可留言。码字不易,研究不易,如需转载请注明出处。

准备工作完毕,开始引入组件中

/* 
 *  需要安装的插件
 *  npm install --save dicom-parser //这个需要安装
*/
// import Hammer from 'hammerjs';//移动端手势插件 npm install hammerjs --save //选用,不需要移动端可不用
import * as cornerstone from '../../public/models/js/cornerstone';
import * as cornerstoneTools from '../../public/models/js/cornerstoneTools.js';
import * as cornerstoneWADOImageLoader from '../../public/models/js/cornerstoneWADOImageLoader';
/*
 * cornerstoneMath.min.js文件 import 始终报错,无奈,最终在 index.html中加入解决,原因未知,知道的大佬可以告知一下
 * <script src="./models/js/cornerstoneMath.min.js"></script>
*/

cornerstoneTools.external.cornerstone = cornerstone;
// cornerstoneTools.external.Hammer = Hammer;
cornerstoneTools.external.cornerstoneMath = cornerstoneMath;

cornerstoneWADOImageLoader.external.cornerstone = cornerstone;
cornerstoneWADOImageLoader.external.cornerstoneMath = cornerstoneMath;

初始化

<template>
	<div id="DICOM" ref='dicom_canvas'></div>
</template>
......
init(){
	let element=this.$refs.dicom_canvas;//获取 dicom 元素节点
  cornerstone.enable(element);//启用节点
  window.addEventListener('resize',function(e){//自适应窗口
    cornerstone.resize(element,true)
  })
}

载入影像数据

start(){
	cornerstone.loadAndCacheImage('http:XXXXXXXX.dcm').then((image)=>{//加载并缓存数据
    cornerstone.displayImage(element,image)//展示 dicom,参数 1:element 元素,参数 2:image
     this.getImageInfo(image);//获取图片信息
  }).catch((err)=>console.log(err))
}

cornerstoneimagerendered事件(重要!)

每当图像被cornerstone重新绘制时,将发出CornerstoneImageRendered事件调用。这个事件包括可以使用HTML5 canvas上下文(例如几何图形或文本)在图像上绘制的信息。你也可以更新HTML覆盖与各种视口属性,如窗口宽度,窗口级别和缩放。

......
  element.addEventListener('cornerstoneimagerendered',function(e){
    let eventData=e.detail;
    this.getViewPort(eventData);//获取当前图片视口信息
  })
getViewPort(eventData){
  this.imageInfo.windowWidth=Math.round(eventData.viewport.voi.windowWidth);//窗宽
  this.imageInfo.windowCenter=Math.round(eventData.viewport.voi.windowCenter);//窗位
  this.imageInfo.scale=parseInt(10 * eventData.viewport.scale);//缩放等级
}
getImageInfo(image){
  this.imageInfo.seriesNumber=image.data.string('x00200011');//图像序列号
  this.imageInfo.imageNum=image.data.string('x00200013');//图像位置
  this.imageInfo.imageDate=image.data.string("x00080021");//拍摄日期
  this.imageInfo.sliceThickness=image.data.string('x00180050');//层厚
  this.imageInfo.patientId=image.data.string('x00100020');//病理号
  // 判断窗宽窗位是否合法
  this.pixelR = image.data.uint16('x00280103');
  this.heightBit = image.data.uint16('x00280102') || '';
  // 病人基本信息
  this.patientName = image.data.string('x00100010');
  this.patientBirthDate = image.data.string('x00100030');
  this.patientID = image.data.string('x00100020');
  this.patientGender = image.data.string('x00100040');
  this.sID = image.data.string('x00200011');
  // 像素间距
  this.pixelSpacing = image.data.string('x00280030');
  this.imagePixelSpacing = image.data.string('x00181164') || '';
  this.rowPixelSpacing = image.rowPixelSpacing;
  // 放射放大系数
  this.magnification = Number(image.data.string('x00181114'));
  // 放射源到面板的距离
  this.sourceTOdetector = image.data.string('x00181110');
  // 放射源到病人的距离
  this.sourceTOpatient = image.data.string('x00181111');
  //this.modalityLUT = cornerstone.metaData.get('modalityLutModule', image.imageId).modalityLUTSequence;
  this.voiContent = cornerstone.metaData.get('voiLutModule', image.imageId);
  // 斜率截距
  this.rescaleIntercept = Number(image.data.string('x00281052'));
  this.rescaleSlope = Number(image.data.string('x00281053'));
}

cornerstoneTools (工具)

// 启用工具
/*
	数字:1 代表鼠标左键;2 代表鼠标中键;4 代表鼠标右键
	可逐一试验功能
*/
cornerstoneTools.mouseInput.enable(this.element);//启动鼠标按下事件
	enableAllTools() {
		cornerstoneTools.wwwc.activate(element);
		cornerstoneTools.pan.activate(element, 2); 
		cornerstoneTools.zoom.activate(element, 1); 
		cornerstoneTools.probe.activate(element, 1);
		cornerstoneTools.length.activate(element, 1);
		cornerstoneTools.ellipticalRoi.activate(element, 1);
		cornerstoneTools.rectangleRoi.activate(element, 1);
		cornerstoneTools.angle.activate(element, 1);
		cornerstoneTools.highlight.activate(element, 1);
		cornerstoneTools.freehand.activate(element, 1);
		cornerstoneTools.stackScroll.activate(element);
		cornerstoneTools.arrowAnnotate.activate(element, 1);
		cornerstoneTools.freehand.activate(element, 1);
		// touch
		cornerstoneTools.wwwcTouchDrag.deactivate(element);
		cornerstoneTools.probeTouch.deactivate(element);
		cornerstoneTools.panTouchDrag.deactivate(element);
		cornerstoneTools.zoomTouchDrag.deactivate(element);
		cornerstoneTools.lengthTouch.deactivate(element);
		cornerstoneTools.ellipticalRoiTouch.deactivate(element);
		cornerstoneTools.rectangleRoiTouch.deactivate(element);
		cornerstoneTools.angleTouch.deactivate(element);
		cornerstoneTools.stackScrollTouchDrag.deactivate(element);
		cornerstoneTools.arrowAnnotateTouch.deactivate(element);
		cornerstoneTools.rotateTouchDrag.deactivate(element);
		cornerstoneTools.rotateTouch.disable(element);
	}
// 停用工具    // before making a new tool active
	disableAllTools() {
		cornerstoneTools.wwwc.disable(element);
		cornerstoneTools.pan.deactivate(element, 2);
		cornerstoneTools.zoom.deactivate(element, 1); 
		cornerstoneTools.probe.deactivate(element, 1);
		cornerstoneTools.length.deactivate(element, 1);
		cornerstoneTools.ellipticalRoi.deactivate(element, 1);
		cornerstoneTools.rectangleRoi.deactivate(element, 1);
		cornerstoneTools.angle.deactivate(element, 1);
		cornerstoneTools.highlight.deactivate(element, 1);
		cornerstoneTools.freehand.deactivate(element, 1);
		cornerstoneTools.stackScroll.deactivate(element);
		cornerstoneTools.arrowAnnotate.deactivate(element, 1);
		cornerstoneTools.freehand.deactivate(element, 1);
		// touch
		cornerstoneTools.wwwcTouchDrag.deactivate(element);
		cornerstoneTools.probeTouch.deactivate(element);
		cornerstoneTools.panTouchDrag.deactivate(element);
		cornerstoneTools.zoomTouchDrag.deactivate(element);
		cornerstoneTools.lengthTouch.deactivate(element);
		cornerstoneTools.ellipticalRoiTouch.deactivate(element);
		cornerstoneTools.rectangleRoiTouch.deactivate(element);
		cornerstoneTools.angleTouch.deactivate(element);
		cornerstoneTools.stackScrollTouchDrag.deactivate(element);
		cornerstoneTools.arrowAnnotateTouch.deactivate(element);
		cornerstoneTools.rotateTouchDrag.deactivate(element);
		cornerstoneTools.rotateTouch.disable(element);
	}

改变窗宽窗位

windowChange(index){
      /*
        * index=1 ww:default,wl:default
        * index=2 ww:1500,wl:-450
        * index=3 ww:250,wl:30
        * index=4 ww:1000,wl:250
        * index=5 ww:300,wl:40
      */
      let viewportDefault = cornerstone.getDefaultViewportForImage(element, image);//获取当前图像默认的窗宽窗位
      // console.log(viewportDefault.voi.windowWidth,viewportDefault.voi.windowCenter)
      let viewport = cornerstone.getViewport(this.element);
      viewport.voiLUT = undefined;


      if(index==1){
        viewport.voi.windowWidth = viewportDefault.voi.windowWidth;
				viewport.voi.windowCenter = viewportDefault.voi.windowCenter;
      }else if(index==2){
        viewport.voi.windowWidth = 1500;
				viewport.voi.windowCenter = -450;
      }else if(index==3){
        viewport.voi.windowWidth = 250;
				viewport.voi.windowCenter = 30;
      }else if(index==4){
        viewport.voi.windowWidth = 1000;
				viewport.voi.windowCenter = 250;
      }else if(index==5){
        viewport.voi.windowWidth = 300;
				viewport.voi.windowCenter = 40;
      }
      cornerstone.setViewport(this.element, viewport);//调节窗宽窗位
    },

鼠标滚轮切换图像

 /*鼠标滚轮事件 */
    mousewheelChange(){
      let _this=this;
      const wheelEvents = ['mousewheel', 'DOMMouseScroll'];
      wheelEvents.forEach((eventType) => {
        this.element.addEventListener(eventType, this.mousewheelHandle);
      });
    },
    
    mousewheelHandle(e){
      let _this=this;
      // Firefox e.detail > 0 scroll back, < 0 scroll forward
      // chrome/safari e.wheelDelta < 0 scroll back, > 0 scroll forward
      if (e.wheelDelta < 0  || e.detail > 0) {//向下滚动
        _this.currentImageIndex++;
        if(_this.currentImageIndex>_this.nowSeries.length-1){
          _this.currentImageIndex=0
        }
      } else {//向上滚动
        _this.currentImageIndex--;
        if(_this.currentImageIndex<0){
          _this.currentImageIndex=_this.nowSeries.length-1
        }
      }
        _this.updateTheImage(_this.currentImageIndex);//根据 ID 索引切换图像

      // 防止页面滚动
      return false;
    },

其他功能

// set the canvas context to the image coordinate system(将画布上下文设置为图像坐标系统)
//绘制前调用
 cornerstone.setToPixelCoordinateSystem(eventData.enabledElement, eventData.canvasContext);

//坐标转换
cornerstone.pageToPixel(element, X, Y)//将像素坐标转为图像坐标,返回x,y对象

//更新图像
cornerstone.updateImage(element);

//清除缓存
cornerstone.imageCache.purgeCache();
cornerstoneWADOImageLoader.wadouri.dataSetCacheManager.purge();
cornerstoneWADOImageLoader.wadouri.fileManager.purge();

//查看缓存
const cacheInfo = cornerstone.imageCache.getCacheInfo();

标签:vue,cornerstonejs,deactivate,DICOM,image,element,data,cornerstone,cornerstoneToo
来源: https://www.cnblogs.com/Apsey/p/14371952.html