修改DICOM图像像素间距的计算方法

src/utils/metaDataProvider.js

@@ -0,0 +1,104 @@
+import * as cornerstoneWADOImageLoader from 'cornerstone-wado-image-loader'
+function parseImageId(imageId) {
+  // build a url by parsing out the url scheme and frame index from the imageId
+  const firstColonIndex = imageId.indexOf(':');
+
+  let url = imageId.substring(firstColonIndex + 1);
+  const frameIndex = url.indexOf('frame=');
+
+  let frame;
+
+  if (frameIndex !== -1) {
+    const frameStr = url.substr(frameIndex + 6);
+
+    frame = parseInt(frameStr, 10);
+    url = url.substr(0, frameIndex - 1);
+  }
+
+  return {
+    scheme: imageId.substr(0, firstColonIndex),
+    url,
+    frame,
+  };
+}
+function getNumberValues(dataSet, tag, minimumLength) {
+  const values = [];
+  const valueAsString = dataSet.string(tag);
+
+  if (!valueAsString) {
+    return;
+  }
+  const split = valueAsString.split('\\');
+
+  if (minimumLength && split.length < minimumLength) {
+    return;
+  }
+  for (let i = 0; i < split.length; i++) {
+    values.push(parseFloat(split[i]));
+  }
+
+  return values;
+}
+function metaDataProvider(type, imageId) {
+  const parsedImageId = parseImageId(imageId);
+  const dataSet = cornerstoneWADOImageLoader.wadouri.dataSetCacheManager.get(parsedImageId.url);
+
+  if (!dataSet) {
+    return;
+  }
+  if (type === 'imagePlaneModule') {
+    const imageOrientationPatient = getNumberValues(dataSet, 'x00200037', 6);
+    const imagePositionPatient = getNumberValues(dataSet, 'x00200032', 3);
+    const pixelSpacing = getNumberValues(dataSet, 'x00280030', 2);
+    const imagePixelSpacing = getNumberValues(dataSet, 'x00181164', 2);
+    const estimatedRadiographicMagnificationFactor = getNumberValues(dataSet, 'x00181114', 2);
+    let columnPixelSpacing = null;
+
+    let rowPixelSpacing = null;
+
+    if (pixelSpacing) {
+      rowPixelSpacing = pixelSpacing[0];
+      columnPixelSpacing = pixelSpacing[1];
+    } else if (imagePixelSpacing && estimatedRadiographicMagnificationFactor) {
+      rowPixelSpacing = imagePixelSpacing[0] / estimatedRadiographicMagnificationFactor[0];
+      columnPixelSpacing = imagePixelSpacing[1] / estimatedRadiographicMagnificationFactor[1];
+    } else if (imagePixelSpacing && !estimatedRadiographicMagnificationFactor) {
+      rowPixelSpacing = imagePixelSpacing[0];
+      columnPixelSpacing = imagePixelSpacing[1];
+    }
+    console.log(rowPixelSpacing, columnPixelSpacing)
+
+    let rowCosines = null;
+
+    let columnCosines = null;
+
+    if (imageOrientationPatient) {
+      rowCosines = [
+        parseFloat(imageOrientationPatient[0]),
+        parseFloat(imageOrientationPatient[1]),
+        parseFloat(imageOrientationPatient[2]),
+      ];
+      columnCosines = [
+        parseFloat(imageOrientationPatient[3]),
+        parseFloat(imageOrientationPatient[4]),
+        parseFloat(imageOrientationPatient[5]),
+      ];
+    }
+
+    return {
+      frameOfReferenceUID: dataSet.string('x00200052'),
+      rows: dataSet.uint16('x00280010'),
+      columns: dataSet.uint16('x00280011'),
+      imageOrientationPatient,
+      rowCosines,
+      columnCosines,
+      imagePositionPatient,
+      sliceThickness: dataSet.floatString('x00180050'),
+      sliceLocation: dataSet.floatString('x00201041'),
+      pixelSpacing,
+      rowPixelSpacing,
+      columnPixelSpacing,
+    };
+  }
+}
+export default metaDataProvider;

src/views/dicom-show/dicom-preview.vue

@@ -67,6 +67,8 @@ import * as cornerstoneWADOImageLoader from 'cornerstone-wado-image-loader'
 // import dicomStore from '@/utils/dicom-store'
 import dicomViewer from '@/components/Dicom/DicomViewer'
 import dicomPreview from '@/components/Dicom/DicomPreview'
+import metaDataProvider from '@/utils/metaDataProvider'
+cornerstone.metaData.addProvider(metaDataProvider, { priority: 10 });
 var config = {
   maxWebWorkers: 4,
   startWebWorkersOnDemand: true,

src/views/dicom-show/dicom-study.vue

@@ -143,6 +143,8 @@ import { getInstanceList, getPatientSeriesList, setSeriesStatus } from '@/api/tr
 import requestPoolManager from '@/utils/request-pool'
 import store from '@/store'
 import { changeURLStatic } from '@/utils/history.js'
+import metaDataProvider from '@/utils/metaDataProvider'
+cornerstone.metaData.addProvider(metaDataProvider, { priority: 10 });
 var config = {
   maxWebWorkers: 4,
   startWebWorkersOnDemand: true,

src/views/dicom-show/dicom-visit.vue

@@ -265,6 +265,8 @@ import { getTaskUploadedDicomStudyList } from '@/api/reading'
 import requestPoolManager from '@/utils/request-pool'
 import store from '@/store'
 import { changeURLStatic } from '@/utils/history.js'
+import metaDataProvider from '@/utils/metaDataProvider'
+cornerstone.metaData.addProvider(metaDataProvider, { priority: 10 });
 // import * as cornerstoneTools from 'cornerstone-tools'
 var config = {
   maxWebWorkers: 4,

src/views/trials/trials-panel/reading/dicoms/components/ReadPage.vue

@@ -76,6 +76,8 @@ import { mapGetters } from 'vuex'
 import * as dicomParser from 'dicom-parser'
 import * as cornerstone from 'cornerstone-core'
 import * as cornerstoneWADOImageLoader from 'cornerstone-wado-image-loader'
+import metaDataProvider from '@/utils/metaDataProvider'
+cornerstone.metaData.addProvider(metaDataProvider, { priority: 10 });
 var config = {
   maxWebWorkers: 4,
   startWebWorkersOnDemand: true,

src/views/trials/trials-panel/reading/dicoms/customize/CustomizeReadPage.vue

@@ -77,6 +77,8 @@ import { mapGetters } from "vuex";
 import * as dicomParser from 'dicom-parser'
 import * as cornerstone from 'cornerstone-core'
 import * as cornerstoneWADOImageLoader from 'cornerstone-wado-image-loader'
+import metaDataProvider from '@/utils/metaDataProvider'
+cornerstone.metaData.addProvider(metaDataProvider, { priority: 10 });
 var config = {
   maxWebWorkers: 4,
   startWebWorkersOnDemand: true,