> ## Documentation Index
> Fetch the complete documentation index at: https://docs.navnx.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Loading DICOM Files

> How to load DICOM imaging data into the NavNX planner.

## Loading DICOM Files

Before you can begin planning, you need to load the patient's CT or MRI imaging data into the case.

## Upload Methods

### Drag and Drop

The simplest method: drag a folder of DICOM files (or a ZIP archive) directly onto the planner viewport. NavNX will parse the files, identify the series, and load the imaging data.

### File Picker

Click the **Upload DICOM** button in the toolbar or on the case detail page. A file picker dialog opens where you can select:

* A folder containing `.dcm` files
* Individual `.dcm` files
* A `.zip` archive containing DICOM files

<Tip>
  ZIP upload is the fastest method for large studies. Compress your DICOM folder into a single ZIP file before uploading.
</Tip>

## What Happens During Upload

<Steps>
  <Step title="Parsing">
    NavNX reads the DICOM headers to identify series, modality, and patient metadata.
  </Step>

  <Step title="Cloud upload">
    Files are uploaded to secure cloud storage (Google Cloud Storage) with encryption in transit and at rest.
  </Step>

  <Step title="Loading">
    The imaging data is loaded into the viewport. The viewer starts at the **middle slice** of the series.
  </Step>
</Steps>

## Cloud Storage

Once uploaded, DICOM files are stored securely in the cloud. When you reopen the case, the imaging data is automatically reloaded — there is no need to upload again.

<Note>
  DICOM files are stored in your organisation's regional data centre. Data never leaves the jurisdiction where your organisation is registered.
</Note>

## Supported Formats

| Format               | Supported |
| -------------------- | --------- |
| DICOM (.dcm)         | Yes       |
| DICOM (no extension) | Yes       |
| ZIP containing DICOM | Yes       |
| NIfTI (.nii)         | No        |
| JPEG/PNG             | No        |

<Warning>
  NavNX does not modify or delete original DICOM files. The uploaded data is a copy stored in the cloud alongside the case.
</Warning>