Patient guide · MRI imaging
One-part MRI, a targeted single-region MRI — brain, spine, knee, shoulder or prostate.
A one-part MRI is a focused scan of a single body region (brain, spine, knee, shoulder, prostate, etc.) — 20–40 minutes, consultant radiologist report, no radiation. The right choice when the clinical question is region-specific.
Key facts
- 01
Definition
A one-part MRI is a focused single-region MRI scan (one anatomical area).
- 02
20–40 minute scan
Total scanner time is typically 20–40 minutes, depending on the region and sequences.
- 03
No ionising radiation
MRI uses magnetic fields and radio waves — no X-rays, no radiation dose.
- 04
IV contrast optional
Gadolinium contrast is used only when the clinical question requires it.
- 05
Consultant radiologist reports
Every scan is reported by a subspecialty consultant radiologist.
- 06
Report within 48 hours
A written report is issued within 48 hours, sooner for urgent cases.
How it works
From referral to report — what happens, in order.
Seven steps: consultation, safety, preparation, scan, and a consultant radiologist report.
Phase 1 · Before your scan
Referral, safety and preparation
Phase 2 · On the day
20–40 minutes in the scanner
Phase 3 · After
Consultant radiologist report
- 01
Before
Consultation and referral
A short conversation to confirm the clinical question and the right MRI region.
- 02
Before
Metal safety check
Pacemakers, implants, aneurysm clips and metal fragments are screened before booking.
- 03
Before
Fast 4 hours if contrast
If IV gadolinium is planned, fast for 4 hours beforehand; take medications as usual.
- 04
On the day
Change into gown
You change into a gown and remove all metal — jewellery, coins, hairpins.
- 05
On the day
Lie in scanner
You lie on the couch and are moved into the bore. Ear protection is provided.
- 06
On the day
Sequences acquired
Multiple pulse sequences are acquired — each answers a different tissue question.
- 07
After
Written report
A structured written report from the consultant radiologist within 48 hours.
Typical end-to-end: 2–5 days. Urgent cases: same day.
What it shows
When a one-part MRI is the right test.
A one-part MRI answers a region-specific question — a single anatomical area, in high soft-tissue detail. These are the regions we scan most.
-
Brain (stroke, MS, tumour)
Ischaemia, demyelination, mass lesions, haemorrhage and vascular anomalies.
-
Spine (disc, cord)
Disc disease, cord compression, myelopathy, nerve-root impingement.
-
Knee (meniscal, ACL)
Meniscal tears, ACL/PCL and collateral ligaments, cartilage, bone-marrow oedema.
-
Shoulder (rotator cuff, labrum)
Rotator-cuff tears, labral pathology, impingement, capsular thickening.
-
Hip (labrum, FAI)
Labral tears, femoroacetabular impingement, avascular necrosis, tendinopathy.
-
Prostate (multiparametric)
Multiparametric MRI for suspected prostate cancer — PI-RADS reporting.
-
Pelvis (endo, fibroids)
Endometriosis mapping, fibroids, adenomyosis, adnexal characterisation.
-
Red flag: acute stroke or cord compression — urgent pathway
These are emergencies — do not wait for a private slot. Go to A&E or call 999.
What follows
What can happen after the report.
The MRI answers a question. What follows depends on the finding and the clinical context.
-
Reassurance if normal
A normal MRI in the right clinical context is a definitive answer — reassurance and discharge.
-
Structured follow-up imaging
Interval MRI at a specified timeframe to characterise stability or change.
-
Onward specialist referral
Referral to the relevant subspecialty — neurology, orthopaedics, urology, gynaecology.
-
MDT review
Multidisciplinary team discussion for complex or oncological findings.
-
Biopsy planning
MRI-targeted biopsy planning — particularly for prostate and soft-tissue lesions.
-
Surgical planning
Pre-operative mapping for orthopaedic, neurosurgical and pelvic procedures.
-
Radiotherapy planning
MRI-based target-volume definition for radiation oncology.
-
Structured surveillance
Long-term MRI surveillance programme for known lesions or high-risk anatomy.
Safety and red flags
MRI is very safe — but there are things to know.
Metal safety, contrast, pregnancy, claustrophobia and the clinical presentations that mean A&E, not a private slot.
-
Metal implant safety
Pacemakers, cochlear implants, aneurysm clips and metal fragments must be screened before booking.
-
Claustrophobia
The scanner bore is enclosed — wide-bore or open-MRI options and sedation are available.
-
Renal impairment + gadolinium
eGFR is checked before IV contrast; gadolinium may be contraindicated in severe renal impairment.
-
Pregnancy (relative)
MRI is preferred over CT in pregnancy, but gadolinium is generally avoided.
-
Contrast anaphylaxis
Rare, but previous reactions to gadolinium must be declared before booking.
-
Acute stroke
Sudden neurology — one-sided weakness, slurred speech, facial droop — is a 999 call, not a private slot.
-
Cord compression
Suspected acute cord compression is a neurosurgical emergency — A&E immediately.
-
Suspected malignancy
Suspected cancer follows a defined pathway — MRI is one step within it, not the whole answer.
-
Suspected multiple sclerosis relapse
Acute demyelinating episodes should be discussed with neurology before elective imaging.
Sources
Standards and guidance this page draws on.
Reviewed against the current radiology consensus.
Editorial note
Clinically reviewed. Next review by 2027-07-30.
Reviewed by Pulse Atlas Editorial Board (). Published 2026-07-30.
- 01 Reference
Royal College of Radiologists. Standards and guidance for MRI.
Royal College of Radiologists. Standards and guidance for MRI. - 02 Reference
European Society of Radiology. MRI clinical guidance.
European Society of Radiology. MRI clinical guidance. - 03 Reference
American College of Radiology. ACR Appropriateness Criteria.
American College of Radiology. ACR Appropriateness Criteria. - 04 Reference
British Institute of Radiology. MRI safety guidance.
British Institute of Radiology. MRI safety guidance.
Frequently asked
Everything we get asked about the one-part MRI.
Quick answers on scan time, safety, contrast, reporting, and when a broader MRI protocol is right instead.
-
What is a one-part MRI?
A one-part MRI is a focused MRI scan of a single anatomical region — for example the brain, spine, knee, shoulder or prostate. It answers a region-specific clinical question and is the most common MRI referral.
-
How long does a one-part MRI take?
Scanner time is typically 20–40 minutes, depending on the region and whether IV contrast is used. Allow around an hour at the clinic in total.
-
Is a one-part MRI safe?
MRI uses magnetic fields and radio waves, not ionising radiation. It is very safe, provided metal-implant screening is completed and, if contrast is used, kidney function has been checked.
-
Do I need contrast?
Not always. IV gadolinium contrast is added only when the clinical question requires it — for example characterising a mass, active demyelination, or infection. Your radiologist decides based on the referral.
-
When will I get my report?
A written report from a consultant radiologist is issued within 48 hours, and sooner for urgent cases. Findings can often be discussed on the day.
-
When would I need a five-part or full-body MRI instead?
A one-part MRI is right when the clinical question is region-specific. A five-part or full-body MRI is used for surveillance, screening, or when the differential spans multiple regions.
Related tests
Looking for a different test?
-
MRI scanning
The parent guide to MRI — how it works, safety, and when it is used.
Learn more -
Five-part MRI
A five-region MRI protocol for broader diagnostic coverage.
Learn more -
Full body MRI
Whole-body MRI for surveillance, screening and broad differentials.
Learn more -
All tests
Browse every test and procedure we arrange.
Learn more -
Osteoarthritis Hip Knee
Related condition guide.
Learn more -
Plantar Fasciitis
Related condition guide.
Learn more -
Cortisone Shots
Related treatment option.
Learn more -
Chondroplasty
Related treatment option.
Learn more
In practice, in London
The London pathway for one part MRI
With one part MRI, the London question is usually about report turnaround and the radiologist reading it — not whether the scan is available. On the NHS, one part MRI typically sits behind a triage step and a wait that can stretch from a few weeks into months. In London’s private sector, the same appointment often lands within days. That speed matters when symptoms are disrupting work, sleep, or a plan you’d already committed to — and it’s the single most common reason people call us in the first place.
In practice, a private one part MRI appointment in London means a named consultant, a proper hour in the room (or the equivalent on a video call), and a report you can actually read. Most of the imaging suites and endoscopy units we use sit within a mile of Harley Street or in Chelsea and Fulham, and turnaround on findings is measured in days, not weeks. For one part MRI specifically, the difference between a routine report and a sub-speciality read is where private care earns its keep.
Where a good concierge earns its keep is in the matching. There are dozens of consultants in London who see one part MRI — but not all of them are the right fit for every case. We narrow it down based on subspecialty, insurer coverage, the specific question being asked, and whether continuity into treatment matters. The right first appointment saves you from repeating yourself later.