Cornerstone Image Loader for DICOM WADO-URI and WADO-RS

Usage no npm install needed!

<script type="module">
  import cornerstoneFsImageLoader from '';


NPM version NPM downloads MIT License Build Status Coverage Status

cornerstone WADO Image Loader

A cornerstone Image Loader for DICOM P10 instances over HTTP (WADO-URI) or DICOMWeb (WADO-RS). This can be used to integrate cornerstone with WADO-URI servers, DICOMWeb servers or any other HTTP based server that returns DICOM P10 instances (e.g. Orthanc or custom servers)


Having problems viewing your images with cornerstonWADOImageLoader? Check out the troubleshooting guide.

Live Examples

Click here for a live example of this library in use!

You can also see it in action with the cornerstoneDemo application.


Get the distributed unminimized file:

or the distributed minimized file:


The cornerstoneWADOImageLoader depends on the following external libraries which should be loaded before cornerstoneWADOImageLoader.js:

  1. dicomParser
  2. cornerstone

New in 1.0.0: Specify the cornerstone instance you want to register the loader with.

cornerstoneWADOImageLoader.external.cornerstone = cornerstone;

Have your code configure the web worker framework:

    var config = {
        maxWebWorkers: navigator.hardwareConcurrency || 1,
        startWebWorkersOnDemand : true,

See the web workers documentation for more details on configuring.

Key Features

  • Implements a cornerstone ImageLoader for DICOM P10 Instances via a HTTP get request.
    • Can be used with a WADO-URI server
    • Can be used with Orthanc's file endpoint
    • Can be used with any server that returns DICOM P10 instances via HTTP GET
  • Implements a cornerstone ImageLoader for WADO-RS (DICOMWeb)
  • Supports many popular transfer syntaxes and photometric interpretations see full list and codec for more information.
  • Framework to execute CPU intensive tasks in web workers
    • Used for image decoding
    • Can be used for your own CPU intensive tasks (e.g. image processing)


  • Support for images with pixel padding
  • Support for high bit (e.g. mask out burned in overlays)
  • Free up DICOM P10 instance after decoding to reduce memory consumption
  • Add support for compressed images to WADO-RS loader
  • Look at using EMSCRIPEN based build of IJG for JPEG
  • Consolidate all EMSCRIPTEN codecs into one build to cut down on memory use and startup times
  • Add support for bulk data items to WADO-RS Loader
  • Add events to webWorkerManager so its activity can be monitored
  • Add support for issuing progress events from web worker tasks


Why is this a separate library from cornerstone?

Mainly to avoid adding a dependency to cornerstone for the DICOM parsing library. While cornerstone is intended to be used to display medical images that are stored in DICOM, cornerstone aims to simplify the use of medical imaging and therefore tries to hide some of the complexity that exists within DICOM. It is also desirable to support display of non DICOM images so a DICOM independent image model makes sense.

How do I build this library myself?

See the documentation here

How do I add my own custom web worker tasks?

See the documentation here

How do I create imageIds that work with this image loader?

See the documentation here


Copyright 2016 Chris Hafey