Getting the right scan can affect both your medical bills and how strong your injury claim looks. If a doctor orders a CT first and an MRI later, that usually means they were checking different problems, not repeating the same test. A CT scan uses X-rays and computer imaging to create cross-section pictures of the body. It is fast and is commonly used to spot fractures, internal bleeding, organ damage, and some head injuries in an emergency. An MRI uses magnets and radio waves, not radiation, and usually gives better detail of soft tissues like discs, ligaments, nerves, tendons, and the brain.

That difference matters after a crash, fall, or work injury. A CT may show that no bone is broken, while an MRI later shows a torn meniscus, herniated disc, or ligament damage. Insurance companies sometimes act like a negative CT means you are fine. It does not. The scan has to match the suspected injury.

For an injury case, follow the treating provider's recommendations, keep copies of imaging reports, and do not skip follow-up because traffic on I-5 or I-205 is a mess. Gaps in care can hurt damages arguments. In Oregon, most personal injury claims are controlled by the 2-year statute of limitations, ORS 12.110, so delayed diagnosis can create real pressure on timing as well as treatment.