Patient Positioning & Repeat Scans

MRI Patient Positioning: How Getting It Wrong Leads to Repeat Scans

Every repeated MRI scan costs a facility somewhere between $500 and $2,000 or more once you account for machine time, technologist time, radiologist re-reads, and the ripple effect on the day's schedule. Multiply that by a repeat scan rate that runs 5% to 20% at a typical facility, and the annual cost of avoidable rescans can reach well into six figures for a single scanner. The single most preventable driver of that number isn't equipment failure or a bad protocol — it's MRI patient positioning.

Poor positioning causes motion artifacts, off-center anatomy, coil misalignment, and discomfort that turns into movement during long sequences. Unlike a hardware fault, positioning problems are almost entirely within a department's control. A few extra minutes of deliberate setup can be the difference between a diagnostic image and a call-back appointment.

This guide breaks down the true cost of MRI rescan causes, why positioning sits at the top of the list, and what to do about it — body region by body region, plus the comfort strategies and equipment that keep patients still long enough to get it right the first time.

The True Cost of MRI Repeat Scans

"Just rescan it" sounds simple until you total up what that decision actually costs. A repeat scan isn't a five-minute inconvenience — it's a cascading expense that touches nearly every part of the department.

Financial Impact

• Machine time: A repeat sequence can add 5–20 minutes to an already-booked slot, and a full repeat exam can consume an entire additional appointment worth $500–$2,000+ in machine time.
• Staff time: Technologists spend extra time repositioning, re-explaining instructions, and re-running sequences — unbillable time that's still very real on the labor ledger.
• Radiologist re-reads: Every non-diagnostic image that reaches a radiologist still has to be reviewed, flagged, and often re-ordered, adding to already-stretched reading queues.

Patient Impact

A second appointment means longer time-to-diagnosis and, for anxious patients, a second round of the exact stress that likely caused the original motion problem. Some patients who tolerated the first scan without sedation end up needing conscious sedation for the repeat.

Department Impact

Every repeat scan pushes back every patient scheduled after it, and a handful of rescans in a day creates a backlog that increases overtime and technologist fatigue — which, ironically, raises the odds of the next positioning error. If your team is already juggling team roles and safety-level responsibilities, a positioning-driven rescan is one more variable competing for attention.

Why Patient Positioning Is the #1 Preventable Cause of Rescans

Repeat scans have several root causes — equipment malfunction, protocol errors, and positioning error among them. Positioning stands out as the most controllable. Equipment failures require service calls; positioning errors just require training, checklists, and the right supplies.

Motion Artifacts From Uncomfortable Positioning

A patient pinned into an unnatural position — neck twisted, lumbar spine unsupported, shoulder wrapped awkwardly into a coil — will shift within the first few minutes of a long sequence simply because the position isn't sustainable, blurring the image and forcing a rerun.

Incorrect Coil Placement From Poor Body Alignment

Surface and phased-array coils are designed to sit at a specific distance and angle from the anatomy of interest. Misalign the patient on the table and the coil sits off-target, signal-to-noise drops, and the images may fail to meet diagnostic quality even if the patient never moved.

Patient Movement During Long Sequences (20–60 Minutes)

Many sequences run well beyond the point where an unsupported joint or an unpadded pressure point becomes genuinely painful. The longer the exam, the more positioning support matters — a setup that feels fine at minute two can be intolerable by minute twenty.

Anatomy Not Centered in the Field of View

Simple centering errors — the shoulder just outside the coil's sweet spot, the lumbar spine slightly off isocenter — have nothing to do with patient cooperation. They're catchable with a first-image quality check, but only if that check is built into the workflow.

Comparison to Other Rescan Causes

Equipment failure and protocol errors matter too, but they're rarer and more visible — a coil that won't tune, a clearly wrong sequence. Positioning errors are quieter and more frequent, which is exactly why they deserve dedicated attention in any MRI safety audit or quality improvement effort.

MRI Positioning Best Practices by Body Region

Brain and Head

Foam padding on both sides of the head eliminates side-to-side rocking, and a chin strap or gentle chin positioning prevents mid-scan tilt. Immobilization pads that conform to the coil's interior catch small movements that are invisible to the eye but very visible in a blurred sequence.

Spine

Lumbar exams benefit from a knee-elevation wedge, which flattens the lumbar curve against the table and reduces strain over a long scan. Clear breathing instructions cut down on the subtle motion that comes from unconscious shifting during discomfort.

Extremities

Wrist, ankle, and knee studies depend on rigid immobilization — a limb that drifts even a centimeter during a high-resolution sequence will blur fine detail. Purpose-built extremity pads and straps hold the joint fixed rather than relying on the patient to "just hold still."

Abdomen and Pelvis

Breathing coaching is the single biggest lever here — patients who don't understand exactly when to hold their breath will move the diaphragm at the wrong moment. Correct surface coil placement and a supportive waist strap also prevent the coil from shifting as the patient breathes.

Shoulder

Shoulder imaging is notorious for wrap-around and aliasing artifacts caused by inconsistent positioning. A dedicated positioning pad that keeps the shoulder centered and slightly elevated reduces these artifacts and keeps the joint from rotating mid-exam.

How Patient Comfort Reduces Motion (and Rescans)

Positioning technique only gets you halfway there. The other half is managing the anxiety-motion cycle: an anxious patient tenses, shifts, and breathes irregularly, degrading image quality — which increases the odds of a rescan, which increases anxiety for the next visit. Breaking that cycle connects directly to the accommodations facilities make for pregnant, claustrophobic, and special-needs patients.

Audio/Visual Distraction

Noise-detonating headphones, music, and in-bore video give anxious patients something to focus on besides the enclosed bore, reducing the small, repeated movements that come from nervous fidgeting.

Temperature Management

Scanner rooms run cold to protect equipment, and a shivering patient cannot hold still. Warm blankets and heated positioning pads are inexpensive interventions that measurably reduce motion in long exams.

Communication During the Scan

A two-way intercom and a clear hand-signal system reassure patients they aren't alone or trapped, reducing the panic-driven movement that ruins sequences partway through.

Prism and Prescription Glasses for Claustrophobic Patients

Prism glasses let a patient see out of the bore toward the technologist or a window instead of staring at the coil inches from their face — often the difference between completing the exam and calling it early.

For patients who rely on prescription lenses to see clearly, MRI Med’s MediGlasses create a more familiar and less anxiety-inducing experience. By providing clear vision to patients who cannot wear their everyday glasses inside the scanner, MediGlasses help patients to feel more oriented, comfortable, and at ease from start to finish. 

Browse MRI Med's MRI Patient Comfort collection to find blankets, headphones, prism glasses, and other accessories that help anxious or uncomfortable patients stay still for the full exam.

Building a Rescan-Reduction Protocol

The departments with the lowest repeat scan rates treat positioning as a process, not just an individual habit.

Pre-Scan Checklist

A short, standardized checklist — coil placement confirmed, padding in place, patient centered, communication device tested — takes less than a minute and catches errors that otherwise only show up after a wasted sequence.

First-Image Quality Check

Reviewing the first localizer or short sequence before committing to the full protocol lets technologists catch centering and coil placement problems in seconds, well before a 15-minute sequence has already run.

Staff Training

Positioning technique erodes over time without reinforcement, especially as new hires join. Regular positioning workshops paired with structured onboarding — see our guide to MRI safety training requirements — keep technique consistent across the full staff roster, not just the most experienced technologists.

Tracking Your Repeat Scan Rate

You can't improve what you don't measure. Departments that track repeat scan rate by body region, technologist, and cause can target training and equipment investment where it will actually move the number. A rate above 10% for routine outpatient exams generally signals that positioning technique, patient communication, or equipment needs attention.

Equipment That Reduces Repeat Scans

The right supplies at the table make correct positioning easier and comfortable positioning sustainable for the full length of the exam.

• Positioning pads and wedges: Purpose-shaped foam supports for the head, knees, and shoulders keep anatomy centered and aligned with the coil.
• Comfort accessories: Warm blankets, headphones, and prism glasses reduce the anxiety that drives motion in the first place.
• Table pads: A well-cushioned table surface turns a 45-minute exam from something a patient endures into something they can hold still through.
• Immobilization and support equipment: Straps, braces, and coil-specific supports move the burden of "holding still" from patient willpower onto the equipment.

Browse MRI Med's MRI Imaging Aids collection to find positioning pads, wedges, and immobilization supports sized for every body region and coil configuration in your suite.

Don't Overlook the Transfer Itself

Positioning problems sometimes start before the patient is even on the table. A rushed transfer from a wheelchair or stretcher can leave a patient tense or misaligned before setup begins. Review your approach to avoiding accidents during MRI patient transfers and confirm your MR Safe or MR Conditional wheelchairs and MR Conditional stretchers are properly padded — it pays off in fewer positioning corrections later.

Browse MRI Med's MRI Patient Transport collection to find transfer equipment that keeps patients comfortable and properly aligned from the moment they arrive in the suite.

Special Populations Need Special Positioning Plans

Pediatric patients often need modified padding, shorter setup time, and different communication strategies — covered in our guide to MRI safety compliance for pediatric patients. Bariatric patients need positioning aids rated for higher weight capacities, addressed in our post on bariatric MRI equipment, stretchers, and transfer tools. Patients flagged during a structured pre-MRI screening protocol often need extra schedule time for positioning and comfort setup, not just safety screening.

A patient in genuine distress during a scan is a safety event, not just an image-quality one. Make sure your emergency response plan, including your MRI crash cart, emergency cart, or anesthesia cart, is stocked and positioned appropriately in case a positioning-related distress event escalates.

Equipment Upkeep Matters Too

Positioning pads, table pads, and coil supports wear out. Foam compresses and straps stretch, quietly reintroducing motion artifacts that look identical to a technique problem. Fold a check of positioning equipment into your routine MRI equipment inspection and maintenance schedule, and confirm positioning supplies appear on your facility's MRI safety equipment checklist so worn padding gets replaced before it starts costing you rescans.

Browse MRI Med's MRI Patient Monitoring collection to keep a closer eye on patients during longer exams, so early signs of discomfort or distress can be addressed before they turn into motion and a repeat scan.

Conclusion

Repeat scans are expensive, frustrating, and — in the vast majority of cases — avoidable. Break down the causes and positioning error shows up again and again: uncomfortable setups, misaligned coils, uncentered anatomy, and anxious patients who can't hold still through a 30-minute sequence. None of that requires new hardware to fix. It requires consistent technique, the right padding and immobilization supplies at the table, a comfort strategy for anxious patients, and a lightweight quality-check process that catches problems before a full sequence is wasted.

Facilities that treat positioning as a measurable, trainable process — not just individual skill — consistently report lower repeat scan rates, shorter days, and less overtime. The investment is small: positioning pads, comfort accessories, a checklist, and some training time. The return is a lot of MRI slots that no longer have to be booked twice.

Start by tracking your own repeat scan rate by cause for a month. If positioning shows up as a leading driver — and for most departments, it will — the fixes outlined here are inexpensive, fast to implement, and pay for themselves in avoided rescans almost immediately.

Frequently Asked Questions

What percentage of MRI repeat scans are caused by patient positioning?

Estimates vary by facility and body region, but positioning error is consistently cited as one of the top causes of repeat and non-diagnostic scans, often rivaling motion caused by patient anxiety alone.

How much does a repeat MRI scan actually cost a facility?

Most estimates place the cost between $500 and $2,000 or more once machine time, technologist labor, and radiologist re-read time are factored in, not counting the disruption to the rest of the day's schedule.

What is a typical MRI repeat scan rate?

Published repeat and non-diagnostic scan rates generally range from about 5% to 20% depending on facility, body region, and patient population, with abdominal, pelvic, and pediatric exams often running toward the higher end.

What's the fastest way to reduce positioning-related rescans?

Implement a short pre-scan positioning checklist and a first-image quality check. Both take less than a minute per patient and catch most positioning errors before a full sequence is wasted.

Can better patient comfort really reduce motion artifacts?

Yes. Anxious, cold, or uncomfortable patients move more, and that motion is a leading cause of repeat sequences. Warm blankets, audio distraction, prism glasses, and clear communication measurably reduce the small movements that degrade image quality.