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Comparison Guide

MRI vs CT Scan: Which Do You Need?

Both MRI and CT scans create detailed images of your body, but they work differently and excel at different things. Understanding the differences can help you make informed decisions about your diagnostic imaging.

8 min readUpdated December 2025

Quick Answer

MRI is better for soft tissues (brain, muscles, ligaments, spinal cord) and uses no radiation. CT scan is better for bones, acute injuries, and emergencies - its faster and cheaper but uses X-ray radiation. Your doctor will recommend the right test based on what theyre looking for.

Side-by-Side Comparison

FactorMRICT Scan
Cost (Illinois)$450 - $2,340$350 - $1,800
Scan Time30-60 minutes5-10 minutes
RadiationNoneLow dose X-ray
Best ForSoft tissuesBones, emergencies
Noise LevelLoud (earplugs provided)Quiet
SpaceEnclosed tubeOpen ring

When Doctors Choose Each

Choose MRI For:

  • Brain and spinal cord imaging
  • Joint injuries (ACL, meniscus, rotator cuff)
  • Soft tissue tumors
  • Herniated discs and spinal problems
  • Heart and blood vessel imaging
  • When avoiding radiation is important

Choose CT Scan For:

  • Bone fractures and injuries
  • Emergency situations (trauma, stroke)
  • Chest and lung problems
  • Kidney stones
  • Internal bleeding detection
  • When patients have metal implants

Cost Comparison in Illinois

CT scans are generally 20-30% cheaper than MRI for comparable body regions. However, the right test is always the one that answers your doctors question - choosing a cheaper test that doesnt show what you need isnt a savings.

MRI Average

$1,100 (median in Illinois)

CT Scan Average

$850 (median in Illinois)

Tip: Freestanding imaging centers typically charge 40-60% less than hospital-based imaging for the same quality scan. Always compare prices before scheduling.

Who Cant Have Each Test?

MRI Contraindications

  • Pacemakers (some newer models are MRI-safe)
  • Cochlear implants
  • Metal fragments in eyes
  • Severe claustrophobia (open MRI may help)

CT Contraindications

  • Pregnancy (unless emergency)
  • Contrast allergy (for contrast CT)
  • Kidney problems (for contrast CT)
  • Multiple recent CT scans (radiation exposure)

Compare MRI & CT Scan Prices in Illinois

Search 61 Illinois hospitals to find the best prices for your imaging needs. Save hundreds by comparing before you schedule.