Concierge GI imaging · London
Barium enema, the fluoroscopic double-contrast study of the large bowel — and when a colonoscopy or CT colonography is a better choice.
Barium enema is a fluoroscopic X-ray study of the large bowel using barium contrast and air. Largely superseded by colonoscopy and CT colonography (virtual colonoscopy). Still occasionally used when other options are contraindicated.
Why patients choose us
- 01
The honest first answer
For most patients, colonoscopy or CT colonography is the better test — and we will say so up front rather than book a study for the sake of it.
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When barium is right
Occasionally it still is — for functional studies, fistulae, or complex post-surgical anatomy. We match the study to the question.
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Independent, and free
We are paid by no clinic, so the recommendation is impartial and costs you nothing.
Indicative pricing
What a private barium enema costs in London.
Indicative ranges across our partner clinics — with the recommended alternatives (CT colonography, colonoscopy) shown alongside for context.
In short
A double-contrast barium enema in our network: £550–£1,000, with report typically within 72 hours.
| Study type | Indicative range | Typical duration | Report turnaround |
|---|---|---|---|
| Barium enema (double-contrast) | £550–£1,000 | 30–45 min | 24–72 hrs |
| CT colonography (recommended alternative) | £700–£1,200 | 30 min | 24–72 hrs |
| Diagnostic colonoscopy (with biopsy) | £1,800–£3,000 | 45 min | Same visit |
| Barium enema + fluoroscopic fistulogram | £900–£1,400 | 60 min | 48–72 hrs |
| Contrast enema (water-soluble, post-op) | £450–£800 | 30 min | 24–48 hrs |
| Urgent same-week study | £700–£1,300 | 45 min | Same-week |
Prices vary by clinic and whether the study is a plain barium enema, a fistulogram, or the recommended CT colonography alternative. We come back with a firm quote within one working day.
Key facts
What a barium enema is — and what it isn’t.
A double-contrast fluoroscopic X-ray of the large bowel using barium and air. Largely superseded by colonoscopy and CT colonography. Uses ionising radiation, cannot biopsy, and requires strict bowel prep. Modern indication is rare — functional studies, fistulae, or complex anatomy.
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Fluoroscopic double-contrast X-ray
Barium coats the mucosa and air distends the colon — the double-contrast technique outlines the bowel wall.
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Superseded for most indications
Colonoscopy is the correct first test for suspected cancer, polyps or bleeding. CT colonography is the imaging alternative.
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Still useful in select cases
Functional studies, complex fistulae, and post-surgical anatomy where cross-sectional imaging is inconclusive.
Preparation and journey
From bowel prep to report — what happens, in order.
The study depends on the prep being done properly. Every step is walked through with you in advance.
Phase 1 · Before your study
Bowel prep at home
Phase 2 · On the day
~30–45 minutes at the clinic
Phase 3 · After
Report and pathway
- 01
Before
Full bowel prep 24-48 hours before
Detailed prep instructions sent in advance — laxatives on a schedule so the colon is clear on the day.
- 02
Before
Clear-fluid diet
Clear fluids only in the 24 hours before the study. Water, clear broth, black tea — no milk, no solids.
- 03
On the day
Barium rectal catheter inserted
You lie on your side. A small, soft catheter is placed in the rectum. Uncomfortable but brief.
- 04
On the day
Barium and air introduced under fluoroscopy
Barium coats the colon wall, then air distends the bowel — the double-contrast technique that outlines the mucosa.
- 05
On the day
Multiple positional X-rays taken
You turn on the table so the radiologist can film every segment of colon from the caecum to the rectum.
- 06
On the day
No sedation required
The whole study is awake and takes 30-45 minutes. You go home the same hour.
- 07
After
Report by consultant radiologist
Written report typically within 24-72 hours. If anything abnormal is seen, colonoscopy follows — barium cannot biopsy.
Typical end-to-end: 3–7 days. Urgent cases: same week.
What it shows
What a barium enema can reveal.
The study outlines the colonic mucosa and demonstrates gross anatomy — polyps, diverticula, strictures and fistulae. It cannot biopsy, and anything abnormal is escalated to colonoscopy.
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Colonic polyps
Sessile and pedunculated polyps outlined by the double-contrast technique — though colonoscopy remains more sensitive.
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Colonic diverticulosis
Multiple outpouchings through the colon wall, most commonly sigmoid, shown clearly on barium.
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Colonic strictures
Fixed narrowings — inflammatory, ischaemic or malignant — and their length and location.
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Extrinsic compression
Indentation of the colon by adjacent masses or organ enlargement, sometimes the first clue to disease outside the bowel.
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Fistulae
Abnormal tracks between bowel and bladder, vagina or skin — a classical indication where barium can still help.
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Colonic dilatation
Megacolon and functional dilatation, with real-time assessment of tone and evacuation.
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Redundant sigmoid
Excessively long, tortuous sigmoid that can cause slow transit and difficult colonoscopy.
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Red flag: mass or apple-core stricture — urgent colonoscopy + biopsy pathway
Any suspicious lesion is escalated the same day to colonoscopy with biopsy on a two-week wait pathway.
Next steps
What happens after the study — and the alternatives.
The onward pathway is as important as the imaging itself. Any abnormal finding needs colonoscopy for tissue.
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Colonoscopy for any abnormal finding
Barium cannot biopsy. Any lesion needs colonoscopy for histology — we arrange the onward referral.
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CT colonography as an alternative
A better first test for most patients — faster, no rectal barium retention, and more sensitive for polyps ≥ 6 mm.
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Colorectal surgery referral
Direct referral to a consultant colorectal surgeon when a resectable lesion or complex fistula is found.
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Two-week wait pathway for suspected malignancy
Any apple-core stricture, mass, or high-risk anaemia triggers the NHS two-week wait pathway equivalent in the private sector.
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Repeat imaging surveillance
Follow-up interval imaging for known diverticular disease, strictures, or post-treatment surveillance.
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Dietary and lifestyle advice
Fibre, hydration and activity guidance — modest, evidence-based, and matched to the finding.
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Iron replacement if anaemic
Oral or IV iron alongside the diagnostic work-up when iron-deficiency anaemia is the presenting problem.
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Multi-disciplinary team review
Complex cases are discussed at colorectal MDT — radiologist, surgeon, oncologist and pathologist in one room.
Our vetted London network
A small panel of clinics, we picked them.
GI radiology partners across central, north, west and south London. Not listed publicly — introductions are made privately, once we understand your case.
Selection criteria
How we choose every clinic in our network.
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Consultant GI radiologists with fluoroscopy fellowship training
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Modern digital fluoroscopy with low-dose pulsed protocols
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Same-week reporting, with images available for onward review
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Direct onward pathway to colonoscopy or colorectal surgery if disease is found
Red flags and safety
When barium is not the right first test.
Barium enema is safe when correctly indicated — but for many presentations, colonoscopy or CT is the correct first step. These are the flags we look for.
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Colonic mass / apple-core stricture
Any suspicious lesion is escalated immediately to colonoscopy with biopsy — barium alone is never the endpoint.
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Iron deficiency anaemia
A red flag for colorectal cancer. Colonoscopy is the correct first test, not barium.
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Rectal bleeding
New rectal bleeding, especially over 50, needs colonoscopic assessment first.
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Change in bowel habit
Persistent change over six weeks, particularly with weight loss, warrants urgent colonoscopy.
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Unintentional weight loss
Unexplained weight loss with any bowel symptom is a two-week wait indication.
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Ileus / obstruction
Suspected large-bowel obstruction needs CT — barium can worsen impaction and obscure the pathology.
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Suspected perforation (contraindication to barium)
Barium is contraindicated — extravasated barium causes chemical peritonitis. Water-soluble contrast is used instead.
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Post-radiotherapy stricture
Pelvic radiotherapy strictures need careful contrast selection and gentle technique.
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Fistula
A recognised indication where barium (or water-soluble contrast) can define the tract when other imaging is inconclusive.
Reading your report
A barium enema report can look intimidating. It isn’t.
Whatever the finding, the report keeps to the same four parts.
A quiet reminder
The report is written for your doctor, not for you — and that’s normal.
If you would like us to talk you through it before your follow-up, just ask.
- 01 Header
Indication and prep quality
Your details, the reason for the study, and how well the bowel prep worked — because prep quality shapes what can be seen.
- 02 Technique
Contrast, projections, screening time
Which contrast agent, which positions and views were filmed, and the total fluoroscopy screening time.
- 03 Findings
Segment-by-segment colonic description
From caecum to rectum: mucosal outline, distensibility, diverticula, polyps, strictures and extrinsic compression.
- 04 Impression
The conclusion: read this first
Normal, benign, or suspicious — and the concrete next step, which for anything abnormal is colonoscopy.
Recognised by major UK insurers
Cover depends on your policy and clinic; we confirm with your insurer before booking.
Frequently asked
Everything we get asked about barium enema.
Quick answers on cost, bowel prep, safety, and when colonoscopy or CT colonography is the better test.
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Is a barium enema still used?
Rarely. Colonoscopy and CT colonography (virtual colonoscopy) have largely superseded it because they are more sensitive and, in the case of colonoscopy, allow biopsy. Barium enema still has a place for functional studies, fistulae, and some complex post-surgical anatomy.
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Should I have a barium enema or a colonoscopy?
For almost every indication — including suspected cancer, polyp surveillance, rectal bleeding and iron-deficiency anaemia — colonoscopy is the correct first test because it is both diagnostic and therapeutic (biopsy and polypectomy). We will say so up front.
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How much does a private barium enema cost in London?
A double-contrast barium enema is typically £550–£1,000 in our network. A CT colonography is usually £700–£1,200 and a diagnostic colonoscopy £1,800–£3,000. We confirm a firm figure within one working day.
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What is the bowel prep like?
Detailed instructions are sent in advance. You will move to a clear-fluid diet 24 hours before and take oral laxatives on a set schedule. It is inconvenient rather than painful, and the study depends on it being done properly.
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Is a barium enema safe?
The study uses ionising radiation and barium contrast. It is contraindicated if perforation is suspected — barium in the peritoneum causes chemical peritonitis. Water-soluble contrast is used instead in that situation.
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How quickly will I get results?
A written report from the consultant radiologist typically within 24–72 hours. Any suspicious finding is flagged the same day so the onward colonoscopy pathway can start immediately.
Sources
What this guide is built on.
- Royal College of Radiologists. iRefer imaging guidelines.
- NICE. Colorectal cancer (NG151).
- Bowel Cancer UK. Tests and diagnosis.
- Association of Coloproctology of Great Britain and Ireland.
Published 2026-07-30. Last reviewed 2026-07-30. Next review 2027-07-30. Reading time ~6 minutes. Reviewed by Pulse Atlas Editorial Board ().
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In practice, in London
The London pathway for barium enema
With barium enema, the London question is usually about report turnaround and the radiologist reading it — not whether the scan is available. The wait for barium enema on the NHS depends heavily on where you live and how urgently the referral is graded. Central and West London private clinics can normally book within a week, with imaging or a procedure slot to follow shortly after. It’s worth being honest about the reason for going private: usually it’s time, not a fundamentally different test.
Once you’re in the private system for barium enema, the pace picks up noticeably. Consultant slots run to time, imaging is usually available in the same building or a short walk away, and the report comes back typed and detailed. It’s the coordination that tends to feel different — one person on the other end of the phone, not a switchboard. For barium enema specifically, the difference between a routine report and a sub-speciality read is where private care earns its keep.
Fit matters more than people expect. For barium enema, the right consultant depends on what you actually need — a second opinion, a definitive diagnosis, a bridge into treatment, or reassurance that nothing’s being missed. We match on that, not on who has the biggest brochure. If a test isn’t the right next step, we’ll say so before you book anything.