The systems, methods, and GUIs of the present invention not only have the ability to display DICOM and non-DICOM images simultaneously, side-by-side in a single viewer, but also display a timeline corresponding to more than one healthcare study. A selection of more than one healthcare study from different sources, without requiring a single storage repository or single PACS system, is received and a viewer is launched for the selected studies. Any DICOM images are converted to a non-DICOM format such that non-DICOM images from the more than one healthcare study side-by-side in the viewer. A timeline corresponding to more than one healthcare study for a patient is provided. From the timeline, images from different sources can be selected and displayed side-by-side in the viewer in a non-DICOM format.