Dr. Chad BarkerA: MRI is an imaging tool that uses magnetization instead of radiation. Tesla (T) is the strength of the magnet; the higher the strength, the more signal that can be produced which means better resolution and shorter scan times, both of which improve detail. A shorter scan also improves patient comfort - less time lying flat. Large defects, such as fractures or large ligament/tendon tears, are usually visualized with a 1.5 Tesla MRI; however, detection of smaller defects, such as chondral fissures (small tears in the cartilage) or small ligament tears, require the higher detail provided by 3T. These minute pathology can cause pain and, if not seen, the patient is at risk for misdiagnosis and mistreatment.
- Dr. Chad Barker, Tennessee Interventional and Imaging Associates; member, Chattanooga-Hamilton County Medical Society