---
sidebar_position: 2
sidebar_label: Release Notes
---

# Release Notes

> New `OHIF-v3` architecture has made OHIF a general purpose extensible medical
> imaging **platform**, as opposed to a configurable viewer.

## What's new in `OHIF-v3`

`OHIF-v3` is our second try for a React-based viewer, and is the third version
of our medical image web viewers from the start. The summary of changes includes:

- Addition of workflow modes
  - Often, medical imaging use cases involves lots of specific workflows that
    re-use functionalities. We have added the capability of workflow modes, that
    enable people to customize user interface and configure application for
    specific workflow.
  - The idea is to re-use the functionalities that extensions provide and create
    a workflow. Brain segmentation workflow is different from prostate
    segmentation in UI for sure; however, they share the segmentation tools that
    can be re-used.
  - Our vision is that technical people focus of developing extensions which
    provides core functionalities, and experts to build modes by picking the
    appropriate functionalities from each extension.

* UI has been completely redesigned with modularity and workflow modes in mind.
* New UI components have been built with Tailwind CSS
* Redux store has been removed from the viewer in favour of services backed by
  React's Context API

Below, you can find the gap analysis between the `OHIF-v2` and `OHIF-v3`:

<table>
    <thead>
        <tr>
            <th align="left" width="50%">OHIF-v2 functionalities</th>
            <th align="center">OHIF-v3</th>
            <th align="center">Comment</th>
        </tr>
    </thead>
<tbody>
    <tr>
        <td align="left">Rendering of 2D images via Cornerstone</td>
        <td align="center">✅</td>
        <td align="center"></td>
    </tr>
    <tr>
        <td align="left">Study List</td>
        <td align="center">✅</td>
        <td align="center"></td>
    </tr>
    <tr>
        <td align="left">Series Browser</td>
        <td align="center">✅</td>
        <td align="center"></td>
    </tr>
    <tr>
        <td align="left">DICOM JSON</td>
        <td align="center">✅</td>
        <td align="center"></td>
    </tr>
    <tr>
        <td align="left">2D Tools via CornerstoneTools</td>
        <td align="center">✅</td>
        <td align="center"></td>
    </tr>
    <tr>
        <td align="left">OpenID Connect standard authentication flow for connecting to identity providers</td>
        <td align="center">✅</td>
        <td align="center"></td>
    </tr>
    <tr>
        <td align="left">Internationalization</td>
        <td align="center">✅</td>
        <td align="center"></td>
    </tr>
    <tr>
        <td align="left">Drag/drop DICOM data into the viewer (see https://viewer.ohif.org/local)</td>
        <td align="center">✅</td>
        <td align="center"></td>
    </tr>
    <tr>
        <td align="left">White-labelling: Easily replace the OHIF Logo with your logo</td>
        <td align="center">✅</td>
        <td align="center"></td>
    </tr>
    <tr>
        <td align="left">DICOM Whole-slide imaging viewport</td>
        <td align="center">🔜</td>
        <td align="center">In Progress</td>
    </tr>
    <tr>
        <td align="left">IHE Invoke Image Display - Standard-compliant launching of the viewer (e.g. from PACS or RIS)</td>
        <td align="center">🔜</td>
        <td align="center">Not Started</td>
    </tr>
    <tr>
        <td align="left">DICOM PDF support</td>
        <td align="center">🔜</td>
        <td align="center">Not Started</td>
    </tr>
    <tr>
        <td align="left">Displaying non-renderable DICOM as HTML</td>
        <td align="center">🔜</td>
        <td align="center">Not Started</td>
    </tr>
    <tr>
        <td align="left">Segmentation support</td>
        <td align="center">🔜</td>
        <td align="center">Not Started</td>
    </tr>
    <tr>
        <td align="left">RT STRUCT support</td>
        <td align="center">🔜</td>
        <td align="center">Not Started</td>
    </tr>
    <tr>
        <td align="left">DICOM upload to PACS</td>
        <td align="center">🔜</td>
        <td align="center">Not Started</td>
    </tr>
    <tr>
        <td align="left">Google Cloud adapter</td>
        <td align="center">🔜</td>
        <td align="center">Not Started</td>
    </tr>
    <tr>
        <td align="left">VTK Extension + MIP / MPR layout</td>
        <td align="center">❌</td>
        <td align="center">Other plans that involves amazing news soon!</td>
    </tr>
    <tr>
        <td align="left">UMD Build (Embedded Viewer). </td>
        <td align="center">❌</td>
        <td align="center">The problem is that this breaks a bunch of extensions that rely on third party scripts (e.g. VTK) which have their own web worker loaders.</td>
    </tr>
</tbody>
</table>