Many MRI scans for patients with lower back pain may be unnecessary.
Canadian researchers say an expert panel that reviewed a thousand requests for lower back MRI scans found that less than half might help doctors care for the patients.
Experts say the biggest concern is the cost. MRI scans are more expensive than X-rays or CT scans.
The study authors say unnecessary MRI scans also inconvenience patients and may put them at risk for more aggressive or invasive tests.