Share password-protected MRI MPRAGE images via Nextcloud. Uploads NIFTI files to Nextcloud zipped with a random password. You send the link to the NIFTI via mail and the password via a secure second channel e.g. WhatsApp or Signal.

• clone this repository to your local machine

• install the following via pip: pip install dicom2nifti wordfreq tqdm pyminizip or use pip install -r requirements.txt

  then enter your credentials into credentials.json

PS: Best practice is to create an API app password in the Nextcloud settings under "security". Don't store your actual user password in plain text on disc, only the app password.

   {"username": "username",         # user name for nextcloud
    "password": "password",         # password for the user
    "remote_path": "MRI-share",     # folder on nextcloud in which the files are uploaded. Needs to exist already.
    "expiration_days": 21,          # delete share after this time
    "include_mricron": true,        # include a program to view NIFTI files (Windows only)
    "nextcloud_baseurl": "https://cloud.server.de"  # server URL

The script expects the the DICOMS to be in subfolders of a main folder, with each folder being named after the participant in question.

├───mri_images
│   ├───subj1
│   │       mprage1.ima
│   │       mprage2.ima
│   │       mprage3.ima
│   │       ....
│   ├───subj2
│   │           ...
│   └───subj3
│   │           .....

1. run script via python share_with_password.py and select the folder that contains the DICOM folders (i.e. the folder above the actual DICOM images, not the folder containing the DICOM images themselves)
2. The script will create random passwords and upload the files to nextcloud
3. A share-list.xlsx will be created containing all the links and passwords.
4. If you need to re-share a file, simply delete the row of the participant from the excel list
5. Send the link to the participant via email. Send the password via a separate, secure channel (i.e. WhatsApp, Signal, iMessage or snail mail).

There is a sample mail available here: mail template