Dicom

DWV (DICOM Web Viewer) is an open source zero footprint medical image viewer. It uses only javascript and HTML5 technologies
https://ivmartel.github.io/dwv/

Source:
https://github.com/ivmartel/dwv

MicroDicom DICOM Viewer 2023.3 Free
https://www.microdicom.com

MRI Viewer: Medical image 2D/3D web viewer
https://github.com/epam/mriviewer
Demo: https://mri-viewer.opensource.epam.com/

OHIF Medical Imaging Viewer
https://github.com/OHIF/Viewers

DICOMweb™ is the DICOM Standard for web-based medical imaging. It is a set of RESTful services, enabling web developers to unlock the power of healthcare images using industry-standard toolsets. DICOMweb can be implemented directly or as a proxy to the DIMSE services to offer modern web-based access to DICOM-enabled systems. Image-producing modalities don’t all need to be retrofitted to support DICOMweb.
https://www.dicomstandard.org/using/dicomweb/