Comparing a New Scan — With Your Previous One

Both serve different purposes, and the CD matters more than most people realise. The printed report tells the current radiologist what the previous reader concluded. The CD lets them look at the actual images and take their own measurements. When a finding is borderline, looking at the original images is not optional — it is how the comparison is done. Bring both every time.

Contact the medical records department of the hospital where each scan was done and request a replacement. Most hospitals keep digital copies of imaging for several years and can re-issue the CD. If the scan was taken many years ago, ask whether archived copies are still available. Your oncologist's team can help write a request letter if the hospital requires a formal referral.

Recovery may not always be possible. If the clinic was part of a chain, contact the head office. If it was independently run, ask your oncologist's team whether the licensing body has records of where data was transferred. If the images cannot be recovered, tell your oncologist clearly — a good radiologist will note the gap and may schedule an earlier follow-up if the comparison cannot be made cleanly.

As far back as you have them. The original staging scan — the one done when your cancer was first diagnosed — is often the single most important document in your scan history because it shows where things started. There is no point at which a prior scan becomes too old to be worth bringing. Bring everything and let the radiologist decide what is useful for the question they are answering.

Some imaging centres can accept images on a USB drive or via a cloud link in DICOM format, the standard format for medical imaging. Ask the centre in advance whether they accept images this way. For now, a physical CD remains the most universally accepted format at most centres in India. Keep the original CDs and use digital copies as a backup rather than a replacement.