mri.md Blog

MRI scans are safe and painless, but the experience can be anxiety-inducing. Here's everything you need to know to prepare, from start to finish.

mri.md explains the key differences between MRI and CT scans — which is better for what, radiation concerns, and what to expect from each.

mri.md shares practical strategies for managing MRI claustrophobia — from open MRI options to sedation to mental techniques that actually work.

mri.md explains gadolinium contrast — why it's used, safety concerns, and what to expect when your MRI requires contrast injection.

mri.md translates common knee MRI findings into plain English — meniscus tears, ACL injuries, cartilage damage, and when surgery is actually needed.

mri.md explains common brain MRI findings — white matter changes, incidental findings, and when your results are cause for concern vs. normal aging.

The same MRI can cost several times more at a hospital than at a freestanding imaging center. Federal rules now give you a right to a written price up front. Here is how to get it.

Most MRI exams run 45 to 60 minutes in the scanner, joints 25 to 45 minutes, cardiac 90 minutes to 2 hours. Here are the durations by body part, what makes a scan run long, and why moving restarts sequences.

Yes. The FDA calls tattoo burning during MRI rare and short-lived, and a 330-person NEJM study found one mild reaction. Here is which tattoos carry more risk, what permanent eyeliner means for the scan, and what to tell the technologist.

Radiologists usually finish an MRI report within one business day. The Cures Act posts it to your portal immediately, often days before your doctor calls.

MRI finds many cancers and is the standard scan for brain, prostate, liver, rectal and high-risk breast tumors. Only a biopsy confirms cancer. Here is why.

MRI noise comes from gradient coils vibrating under Lorentz forces. Scanners reach 90 to 120 decibels, and the FDA caps levels at 99 dBA with ear protection.

Yes. ACOG calls MRI an imaging technique of choice in pregnancy, in any trimester. The caution is gadolinium contrast, which crosses the placenta.

Insurers make MRI a prior authorization item because it costs a lot and gets overused. Since 2026, Medicare Advantage plans must decide standard requests in 7 days.

Usually yes. Dental implants, fillings, braces, and fixed retainers rarely block an MRI, but metal can blur face and neck images. Magnetic dentures need a plan.

Most MRIs need no fasting. Abdominal scans may ask for 4 to 6 hours, cardiac stress MRI bans caffeine, and sedation follows ASA rules of 2 to 8 hours.

Usually yes. MR Conditional devices scan under set limits, and NEJM studies of 1,509 and 1,500 legacy-device patients found no lasting harm at 1.5 tesla.

Yes. Hip and knee replacements are passive, weakly magnetic implants that are usually scanned at 1.5 or 3 tesla, even right after surgery. Here is what limits it.

X-ray or ultrasound comes first for most injuries and lumps. Guidelines move to MRI when those are unclear, and skip back MRIs for 6 weeks without red flags.

Open MRI often matches closed MRI for big tears and fractures, but a low-field scanner missed 5 of 6 cartilage defects in one knee study. When it matters.

Deodorant and lotion are not a known MRI hazard. Eye makeup with iron oxide can blur head scans, and metal-backed medication patches can burn. What to remove.

Most MRIs need no sedation, so you can drive home. After a calming pill you need a ride. After IV sedation or general anesthesia, wait at least 24 hours.

Hearing aids come off before an MRI. Many cochlear implants are MR Conditional at 1.5 or 3 tesla, but the conditions depend on the exact implant model.

An MR angiogram (MRA) is an MRI of your blood vessels, with no radiation and no catheter. Learn why it is ordered, when it needs contrast, and its limits.

An MRCP is an MRI of the bile ducts and pancreatic duct, with no radiation or endoscope. Learn the fasting rules, how it differs from ERCP, and its accuracy.

A 3T MRI magnet is twice as strong as a 1.5T magnet, so it gives more signal and finer detail. Studies often show similar accuracy. See when each one fits.

An MRI arthrogram puts gadolinium into a joint before the scan. In a 202-patient study, the shot rated 16 of 100 for discomfort, less than the MRI itself.

Whole-body MRI finds cancer in about 1.6% of healthy people but flags follow-up findings in about 1 in 3. Here is what radiologists say and who it helps.

A breast MRI adds to a mammogram for women with a 20% or higher lifetime risk, BRCA changes, or chest radiation before 30. Dense breasts are a gray zone.

A cardiac MRI most often lasts 30 to 60 minutes. It shows heart pumping, valves, scar, and inflammation. Step-by-step: ECG leads, breath-holds, and dye.

PI-RADS scores prostate MRI spots from 1 to 5. About 6% of PI-RADS 1 and 85% of PI-RADS 5 patients had significant cancer. What each score means next.

Moving during an MRI blurs images or adds ghost copies. In one 2015 study, 1 in 5 exams needed a repeated series. Who is affected and how to hold still.

An MRI callback usually means an unclear spot, a need for contrast, or a planned follow-up. Learn what it means, how often it happens, and what to ask.

A functional MRI maps brain activity during simple tasks, mainly to plan surgery. See each step of the appointment, how long it takes, and what fMRI cannot do.

Yes. Paragard, Kyleena, and Skyla are MR Conditional; Liletta and Nexplanon are labeled MR safe. Device-by-device FDA label limits and what to tell the tech.

A lumbar MRI shows discs, nerve roots, stenosis, and bone. Bulges appear in 30% to 84% of pain-free adults, by age. Report words explained, plus when to scan.