Glossary term · Tests & reports
DICOM images (also: DICOM files, Original scan files, Digital Imaging and Communications in Medicine): DICOM is the international standard for medical images and related information, used by X-ray, CT, MRI and ultrasound equipment.
DICOM images are your original scan files in the international standard format for medical imaging. DICOM stands for Digital Imaging and Communications in Medicine and is recognised as ISO 12052. Specialists reviewing CT, MRI, PET-CT or angiography studies need these files, not phone photos of films. They let the doctor scroll through every slice at full quality.
Why do specialists ask for DICOM rather than photos?
The DICOM standard defines formats that keep the data and quality needed for clinical use. A printed film or photo shows only a few chosen images. The DICOM study holds the full series, which the specialist can adjust and measure.
Which scans use DICOM?
The DICOM Standard lists X-ray, CT, MRI and ultrasound, and use in cardiology imaging, radiotherapy, ophthalmology and dentistry.
How do I get my DICOM files?
- Ask the imaging centre or hospital for the study on a CD, USB drive or secure download link.
- Ask for the radiologist’s written report too.
- Check that the disc opens and contains image files, not only a viewer.
- Send through a secure file-sharing link rather than email attachments.
Keep the originals
Keep the disc or files you received. Send copies. Name each study with the date and body part.
Questions people ask
My scan disc has a viewer program. Is that DICOM?
Usually the disc contains DICOM files plus a viewer to open them. Send the whole folder, not only the viewer. If unsure, ask the imaging centre to confirm it is a DICOM export of the full study.
Are DICOM files safe to share?
They contain personal details such as your name and date of birth. Share them only with hospitals and services you trust, through a secure method, and with your consent. Avoid posting scans in open chat groups or public forums.
Sources
General information, not medical or legal advice. Rules change: confirm with the official source. Your treating specialist decides on suitability, treatment and length of stay. How we write and check.