Bringing Your Own CT and MRI Scans to a Korean Clinic: DICOM Files, Formats and What Surgeons Need
Cross-sectional slice data, not a photograph of film, is what a surgical planning team can actually work with. Photo: National Cancer Institute / Unsplash
Quick answer Bringing your own CT or MRI scans to a Korean clinic works when the data arrives as DICOM files, the raw format scanners produce, rather than as photographs of film or a written report alone. Most clinics in Seoul can open a USB drive holding a DICOM study; far fewer can read a CD. Carry the radiologist's written report separately, request thin-slice data when the scan is meant for surgical planning, and confirm the accepted media with your clinic before you fly, because cross-border image exchange between hospitals remains limited [3][4].
In this guide
What "bringing your scans" actually means
Three quite different things get called "my scans", and only one of them is useful for surgical planning. The first is the DICOM dataset: the hundreds or thousands of individual cross-sectional slice files a CT or MRI scanner writes, each carrying metadata about slice thickness, orientation, contrast timing and scanner settings. The second is printed film, or a phone photograph of film on a lightbox. The third is the radiologist's written report.
Only the DICOM dataset lets a surgeon re-slice the study, measure distances in millimetres, change window settings to separate bone from soft tissue, and build a three-dimensional reconstruction. DICOM is published by the DICOM Standards Committee, with NEMA acting as secretariat, and is described by the committee itself as the standard for the communication and management of medical imaging information [3].
A photograph of film is a picture of a picture. The resolution, the measurement scale and the ability to adjust contrast are all gone. A clinic will usually look at it, thank you, and then explain that it cannot be used to plan an operation. If you remember one sentence from this guide, make it this one: ask your home hospital for the DICOM data, not for a copy of your scan.
Why a Korean clinic asks for prior imaging
For facial and nasal surgery, a prior CT can show septal deviation, turbinate size, sinus inflammation, the position and material of previous implants, graft sites and bone thickness. Those findings often shape the operative plan rather than merely confirm it, and in revision cases imaging is sometimes the only reliable record of what a previous surgeon actually did. For jaw and contouring work, imaging documents the baseline skeletal position against which any correction is measured.
Prior imaging also changes the quality of a consultation. A surgeon reviewing your own data can be specific about what is and is not achievable, which is exactly the ground on which two surgical plans should be compared. If you are collecting opinions from more than one clinic, giving each the same imaging dataset makes the differences between their plans meaningful rather than cosmetic, a point covered in more depth in our guide to getting a second opinion before surgery in Korea.
There is a practical reason too. A study you already own may spare you a repeat scan, with its cost and, for CT, its radiation dose. Whether it actually does is less certain than most patients expect, and the evidence on that point is set out further down.
How to get the DICOM data from your home hospital
Direct the request to the medical records office or the radiology department, not to the clinician who ordered the scan. Clinicians read images; records departments release them, and the two are rarely the same desk. Most hospitals require photo identification, a signed written request, and sometimes a fee. Turnaround is commonly one to five business days, though it can run longer where a request has to be approved before the data is copied.
Ask explicitly for three things: the full DICOM study on physical media you can carry, the radiologist's written report, and, if the hospital offers one, the small DICOM viewer application often supplied alongside the data. Ask whether the study is thin-slice, and if it was acquired for surgical planning, whether a thin-slice series is available.
Start the request two to three weeks before you fly. Records departments work to their own timetable, and the same paperwork friction applies to documents clinics issue in the other direction, as our guide to medical certificates and employer documents from Korean clinics describes.
Media that travels, and media that fails
The format of the data matters less than whether anyone at the destination can physically open it. Optical discs remain the default output of many hospital records departments and are the least likely medium to work on arrival, because few clinic laptops still have drives. This is not a Korea-specific problem: in March 2026 the American College of Radiology, joined by four other imaging organisations, asked the US Department of Health and Human Services to advance electronic image exchange and phase out CDs and other physical media, noting that existing federal health-IT programmes often focus on electronic health record technologies and data but do not consistently support medical imaging [4].
Medium | Usually readable at a Seoul clinic | Main failure mode | What to do |
USB drive with DICOM files | Yes, the most reliable option | Proprietary viewer that will not run, or files buried in nested folders | Check the drive opens on your own laptop before you fly |
CD or DVD | Often not, as optical drives are increasingly rare | No drive available on site | Ask records for USB instead, or copy the disc yourself |
Hospital patient-portal link | Sometimes | Login or region restrictions, link expiry, codes sent to a home phone number | Download the DICOM files before travelling; do not rely on the link |
Encrypted or password-protected media | Only if the password travels with you | Password held by the records office, not the patient | Confirm the password in writing when you collect the media |
Printed film or phone photos of film | Viewable, but not usable for planning | No measurement scale and no slice data | Bring as a supplement, never as the primary record |
Carrying two copies on separate drives costs very little and removes a single point of failure. Keep one in your hand luggage.
Three avoidable mistakes Arriving with only a phone photograph of film; arriving with encrypted media whose password sits in a records office in another country; and arriving with a cloud link that will not authenticate from a Korean connection. Each of these is usually recoverable only by rescanning, at your cost and on your schedule. |
A USB drive holding the DICOM study is the medium most likely to be readable on arrival. Photo: Sara Kurfess / Unsplash
What the written report adds that the images do not
The radiologist's report is not a duplicate of the images. It carries the interpretation, the measurements the radiologist considered significant, and incidental findings that a surgeon scanning the dataset for one specific question might not look for. It also usually records the scanner model, the slice thickness, the field of view and whether contrast was used, all of which determine how much a receiving clinic can do with the data.
Slice thickness is the detail patients most often miss. A study acquired in thick slices for a general diagnostic question may be adequate for that question while being too coarse for a fine three-dimensional reconstruction. If the scan exists specifically to support surgical planning, ask whether a thin-slice series was acquired, and make sure that series is on the media you carry.
If the report is in a language other than English or Korean, a plain translation of the findings section is usually enough, and a certified translation is rarely required for a consultation. Be clear, though, about who is interpreting clinical content on the day, since that boundary matters. See who is allowed to interpret your surgical consent in Korea and our guide to the scope and limits of clinic language coordinators.
When the clinic will rescan anyway
Treat this as a real possibility rather than a failure. The common reasons are legitimate: the study is too old to represent current anatomy, the slice thickness or field of view does not cover what the surgeon needs, the acquisition protocol differs from the one the clinic's planning software expects, or the clinic prefers imaging acquired in-house for record-keeping reasons. A clinic that proposes a new scan is not automatically upselling.
What you are entitled to is a straight answer to three questions: why the existing study is insufficient, what the new scan will change about the plan, and what it costs. For CT, a new scan also carries a radiation dose, so a clear clinical reason matters more than a reflexive repeat.
Ask for the imaging charge in writing alongside the surgical quote, because imaging is one of the line items most often added after a quote is given. Our guides to how domestic and foreign patient quotes differ and to verifying a surgeon's board certification both bear on how much weight to place on what you are told at this stage.
What the research says
Two large studies bear directly on the question behind this guide: does making prior imaging available actually prevent repeat scans? The honest answer is that it appears to help for some modalities and has not been shown to help much for CT.
Health information exchange and repeat imaging (Vest et al., 2014)
This was a longitudinal cohort study linking access logs from a community health information exchange in an eleven-county region of New York to commercial insurance claims for 2009 and 2010. It covered 196,314 consenting adults, of whom 18 per cent had at least one imaging procedure, giving 56,306 imaging procedures in the index period. Overall, 7.7 per cent of imaging procedures were repeated within 90 days. Where the exchange had been accessed, the repeat rate was 5.2 per cent against 8.0 per cent where it had not, an adjusted odds ratio of 0.75 (95% CI, 0.65 to 0.87), or roughly 25 per cent lower odds of a repeat [1]. Repeat ultrasound fell by 44 per cent and repeat radiographs by 21 per cent. Notably, no association was found for CT, which the authors attribute in part to limited statistical power for that comparison. Their stated limitation is that the data cannot distinguish a clinically appropriate repeat from an unnecessary one.
What this means for you: when a clinician can actually see prior imaging, repeat imaging does appear to fall, but CT is the one modality where the effect was not demonstrated. Treat your existing CT as something that improves the consultation rather than something that reliably replaces a new scan.
Repeat imaging across different hospitals (Turbow et al., 2024)
This cohort study used 2018 national United States Medicare data to examine 275,860 admission-readmission pairs covering 269,348 patients across 3,436 hospitals, asking whether imaging of the same body system was repeated during a 30-day readmission. Overall, 14.3 per cent of beneficiaries had repeat imaging. Readmission to a different hospital carried slightly higher adjusted odds of a repeat than readmission to the same hospital (AOR 1.05; 95% CI, 1.02 to 1.08), and participation in the same health information exchange did not reduce it (AOR 1.06; 95% CI, 1.00 to 1.13). The authors conclude that exchanges as deployed were not associated with lower odds of repeat imaging. Their main stated limitation is that exchange participation is a proxy for availability rather than evidence that clinicians used it, and that some repeat imaging is clinically appropriate [2].
What this means for you: even inside a single country, institutional data-sharing has not reliably eliminated repeat imaging between hospitals. Across a border, with different record systems, languages and regulators, there is no mechanism at all that moves your images for you. The copy you carry is the mechanism, which is why the medium it arrives on deserves this much attention.
Frequently asked questions
Can I just bring photographs of my film?
You can bring them, and they are better than nothing for orientation, but they are generally not usable for surgical planning. A photograph has no measurement scale and no underlying slice data, so distances cannot be measured and contrast cannot be adjusted. Bring them as a supplement to the DICOM files rather than instead of them.
Will a clinic accept a cloud or patient-portal link instead of a USB drive?
Sometimes, but it is the least dependable option. Portal links commonly fail abroad because of login restrictions, expiry windows, or verification codes sent to a home phone number. Download the DICOM files to a drive you physically carry, and keep the link only as a backup.
Do my scans or report need to be translated?
The images themselves need no translation, since DICOM metadata is standardised. For the written report, a plain translation of the findings and conclusion is usually sufficient for a consultation. Certified or notarised translation is generally reserved for insurance and legal purposes rather than clinical review.
How old can a scan be and still be useful?
It depends on what has happened since. Imaging that predates a previous operation is often valuable precisely because it shows the starting anatomy, while imaging meant to represent your current state loses relevance as time and further procedures accumulate. Rather than applying a fixed cut-off, send the study ahead of your consultation and let the clinic tell you whether it is sufficient.
Will bringing my own imaging reduce what I pay?
It may, but it would be unwise to count on it. Clinics frequently rescan for protocol or record-keeping reasons, and the research above suggests that simply making prior imaging available does not reliably prevent a repeat CT. Ask for imaging charges to be itemised in your written quote so that you can see what is and is not included either way.
References
Vest JR, Kaushal R, Silver MD, Hentel K, Kern LM. Health Information Exchange and the Frequency of Repeat Medical Imaging. American Journal of Managed Care, 2014;20(11 Spec No. 17):eSP16-eSP24. PMID 25811815.
Turbow SD, Culler SD, Vaughan EC, et al. Impact of Electronic Information Exchange on Repeat Imaging During 30-Day Readmissions Among Medicare Beneficiaries. American Journal of Managed Care, 2024;30(2):66-72. PMID 38381541. doi:10.37765/ajmc.2024.89493.
DICOM Standards Committee, with NEMA as secretariat. DICOM PS3.1, Introduction and Overview. NEMA Standard PS3, accessed 2026.
American College of Radiology, with RSNA, AAPM, ASRT and SNMMI. Radiology Groups Urge HHS to Support Image Sharing. American College of Radiology, 19 March 2026.
Related reading
About this guide. Korean Plastic Surgery Info is an independent information resource for international patients considering treatment in South Korea. We do not own or operate clinics, and we do not receive commission on treatment bookings. This article is general information drawn from the cited sources and is not medical advice; it cannot account for your individual history. Decisions about imaging, surgical suitability and operative planning belong with a licensed physician who has examined you.
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