Large DICOM Archive Upload

Why am I seeing this warning?

When uploading a large DICOM folder, the browser may display a warning that the upload is too large to preview and needs to be extracted first. The browser uses memory (RAM) to extract ZIP or GZIP archives. This currently limits in-browser extraction to 2 GB.

Extracting the archive directly on your computer avoids this browser limitation because your operating system uses the computer's file system instead.

🚨 How to resolve the issue
If you receive an error message when uploading a large ZIP or GZIP DICOM archive, follow these steps:

1️⃣ Extract/unzip the files onto your computer

• 🪟 Windows: From File Explorer, extract/unzip files using the "Extract all" option from the menu bar. This will create an unzipped folder that can be uploaded.
• 🍎 macOS: From Finder, click on the ZIP folder to unzip to your computer. These files are now available to upload.

2️⃣ Upload the unzipped DICOM folder
Upload the folder containing the unzipped DICOM files instead of the original ZIP/GZIP archive.

3️⃣ Wait for the preview to finish
⏳ Allow the platform to process the files and generate the study preview.

4️⃣ Review and curate the case
🔍 Review the study and remove any unnecessary DICOM series before completing the upload.

5️⃣ Complete the upload
✅ Once the case has been reviewed and curated, proceed with the upload.

💡 Why does this happen?
The 2 GB limit applies only to uploads that are extracted inside the browser.
When uploading large zipped files, the unzipping process can exceed the in-browser memory capacity. Uploading files directly therefore avoids this limitation.