ONLINE DICOMDIR VIEWER · HOSPITAL CD & USB DIRECTORY READER

Online DICOMDIR viewer: How to open hospital CD scans

A DICOMDIR file is the index that hospitals put on CDs and USBs. It tells the viewer which studies, series and images are on the disc and how they are organized.

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100% private in-browser index reading · No software to install · Works on Mac, Windows & Linux

What is a DICOMDIR file?

DICOMDIR is a special DICOM file that acts as a table of contents. Instead of forcing you to open hundreds of individual .dcm files, it lists:

Patient Info

Name, ID, demographics

Studies

CT, MRI, X-ray dates

Series

MRI sequences & planes

Individual Images

Targeted file pointers

When you open a DICOMDIR correctly, the viewer shows a clean list of studies instead of a messy folder structure.

How to open DICOMDIR online (easiest method)

Go to the MedSlice viewer: medslice.app/viewer

Drag the entire folder that contains the DICOMDIR file (or drag the DICOMDIR file itself).

MedSlice automatically reads the index and displays the available studies and series.

Select the study you want to view. No installation needed. Everything stays on your device.

Common problems when opening DICOMDIR

“Nothing happens”

→ Make sure you drag the folder that contains the DICOMDIR, not only the file.

Missing images

→ Some older discs have broken references. Try opening the individual .dcm files instead.

Windows viewer required

→ Ignore the .exe file. You only need the DICOM data.

Frequently Asked Questions

Is DICOMDIR the same as a normal DICOM file?

No. DICOMDIR is an index file. The actual images are separate .dcm files located in subfolders on the disc.

Can I open DICOMDIR on Mac or Linux?

Yes. Browser-based viewers like MedSlice work natively on macOS, Linux, Windows, ChromeOS, and iOS without extra software.

Does MedSlice modify the DICOMDIR?

No. It only reads the file in your browser’s local memory to build the study list.

What if dragging the DICOMDIR shows no images?

Make sure you drag the entire folder that contains the DICOMDIR (or the whole CD directory), so MedSlice can find both the index and the linked .dcm image files.