all files / src/imageLoader/wadouri/ getEncapsulatedImageFrame.js

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
12×
 
12×
 
 
 
 
 
 
 
 
 
 
 
 
 
import { dicomParser } from '../../externalModules.js';
 
/**
 * Function to deal with extracting an image frame from an encapsulated data set.
 */
 
 
function framesAreFragmented (dataSet) {
  const numberOfFrames = dataSet.intString('x00280008');
  const pixelDataElement = dataSet.elements.x7fe00010;
 
  return (numberOfFrames !== pixelDataElement.fragments.length);
}
 
export default function getEncapsulatedImageFrame (dataSet, frameIndex) {
  Eif (dataSet.elements.x7fe00010 && dataSet.elements.x7fe00010.basicOffsetTable.length) {
    // Basic Offset Table is not empty
    return dicomParser.readEncapsulatedImageFrame(dataSet, dataSet.elements.x7fe00010, frameIndex);
  }
 
  // Empty basic offset table
 
  if (framesAreFragmented(dataSet)) {
    const basicOffsetTable = dicomParser.createJPEGBasicOffsetTable(dataSet, dataSet.elements.x7fe00010);
 
    return dicomParser.readEncapsulatedImageFrame(dataSet, dataSet.elements.x7fe00010, frameIndex, basicOffsetTable);
  }
 
  return dicomParser.readEncapsulatedPixelDataFromFragments(dataSet, dataSet.elements.x7fe00010, frameIndex);
}