Whose Scan Is It Anyway? Custody, Copies and Continuity of Venous Imaging in the UK

Most people leave a private venous scan holding a single sheet of paper. Sometimes there is a disc as well, still in its sleeve, never opened. Months later, sitting in an NHS vascular clinic, the question arises: can the consultant see the images? Often the honest answer is no — not because anyone is being obstructive, but because the picture and the patient have travelled by different routes.

Venous imaging is not one object. It is a set of files, a written interpretation, and an administrative record of who did what, when and with which equipment. Understanding that separation is the first step towards an imaging history that holds together.

The report is not the scan

A radiologist's report is a professional interpretation. It describes what was seen, what was measured and what the author concluded. The images themselves are the primary data: the frames, clips and measurements from which that interpretation was drawn.

For venous work — whether a Doppler ultrasound of the jugular veins, a catheter venogram or an MR venogram — the distinction matters. A second reviewer may disagree with a first reading, or may wish to check whether a narrowing was measured at a fixed point or under particular conditions. Without the original files, that review cannot happen. A PDF report alone permits an opinion to be noted, not tested.

Patients sometimes assume that an NHS team can simply look up a private scan. In practice, NHS radiology systems are local. Images are held on a trust's picture archiving and communication system (PACS), and access between organisations is not automatic. Some regions share imaging; many do not.

Who holds the record, and for how long

Under UK data protection law, the organisation that commissioned or performed the scan is the record custodian. It is the controller of that data. The patient does not own the physical disc or the storage hardware, but the patient does hold rights over the information recorded about them.

That difference is worth stating plainly, because it shapes what you can reasonably ask for. You cannot demand the clinic's server. You can require a copy of your data in an intelligible form.

Retention is the quieter issue. Private providers set their own retention periods, constrained by professional guidance and by the need to defend clinical decisions. A small clinic may keep imaging for a shorter period than an NHS trust, and a clinic that closes may transfer records or arrange their destruction. If a scan matters to your future care, ask the provider in writing how long the images will be retained and what happens to them if the service closes. A reply by email is a useful thing to keep.

Using your right of access

A subject access request is the formal route. It is free in ordinary circumstances, and the organisation must respond without undue delay and normally within one month. For complex requests the period can be extended by up to two further months, provided you are told within the first month.

A workable request is specific and courteous. State your full name, date of birth and any reference number. Identify the examination by date and type. Ask for:

• the radiology report;
• the underlying image data in DICOM format, which is the standard format used by viewing software;
• any measurements, worksheets or annotations recorded at the time;
• confirmation of how long the images will be kept.

Requests are usually made by email to the provider's data protection officer or records team. Proof of identity will be required. If the scan contains images of another person — a rare occurrence, but possible in some examinations — that portion may be redacted.

One practical point: ask for the data in a commonly used electronic format. Where a request is made electronically, the information should generally be supplied electronically. Supplying a physical disc is acceptable, but a download link or encrypted file is often easier to keep and to pass on.

What is actually on the disc

A disc handed over at reception may contain a full DICOM study, a bundled viewer, and little else. It may also contain a viewer that will not run on a modern computer, or files that open only on the issuing system.

Before filing it away, test it. Open the disc on a laptop that is not connected to the clinic's network. Check that the images appear, that the correct patient name and date are displayed, and that the report is included. If the disc fails, ask for a replacement or an electronic copy.

If you are sent a compressed archive, keep it alongside an uncompressed copy where possible. Storage is inexpensive; a corrupted file discovered two years later is not recoverable.

Making the scan travel

Continuity is largely a matter of preparation. If you want an NHS clinician to see private imaging, say so before the appointment. Ask the department whether it will accept an external disc or upload, and what format it prefers. Some radiology departments will import outside images into their own system for review; others will view them on a standalone workstation, or not at all.

Bring the disc, the report and a one-page summary: the date, the provider, the examination performed, the reporting clinician and the principal findings. Give a copy to the clinician and ask that it be filed. A general practice record is a reasonable place for that summary to live, because it follows you between services.

A simple imaging log

A single page, updated after each scan, prevents most of these problems. Record the date, the provider, the examination, who reported it, the format you hold, where the files are stored and whether they have been shared with any NHS team. Note any disc that failed to open. The log is not a clinical document and does not need to be elaborate; it is an index.

Sharing safely

Venous images are personal health data. Send them by encrypted email or a secure transfer service, not by ordinary attachment. NHS staff will normally use NHSmail or an approved platform. If you are asked to send images to a clinician by unencrypted email, ask whether there is a safer route. When posting a disc, use recorded delivery.

Before you assume

Four questions are worth asking of any provider, at the point of payment rather than months later. Will I receive the images as well as the report? In what format? How long will you keep them, and who will hold them if the clinic closes? And will you provide a short summary letter that I can give to my NHS team?

The answers determine whether a scan becomes part of a continuous record or a folder of files that no one can open. Custody of imaging is not a bureaucratic detail. It is the difference between an investigation that informs care and one that quietly ends at the clinic door.