What is the role of MRI in the diagnosis of lower back pain?

• A. To confirm bone density
• B. To visualize soft tissues and disc herniation
• C. To assess for fractures
• D. To evaluate blood flow

Answer: (B)

The role of MRI in the diagnosis of lower back pain primarily involves visualizing soft tissues and evaluating conditions such as disc herniation. MRI is particularly effective in providing detailed images of the spine's internal structures, including intervertebral discs, nerves, ligaments, and muscles. This imaging technique allows healthcare providers to detect abnormalities that may be contributing to lower back pain, such as herniated discs, spinal stenosis, or other soft tissue pathologies.

MRI is non-invasive and does not involve ionizing radiation, making it a preferred choice when soft tissue assessment is needed. By offering a comprehensive view of the spinal anatomy, MRI assists clinicians in making informed decisions regarding diagnosis and management of lower back pain.

In contrast, while confirming bone density is crucial for certain conditions, this is typically done using dual-energy X-ray absorptiometry (DEXA) rather than MRI. Assessment for fractures can be performed with MRI, but conventional radiographs or CT scans are often the first-line imaging modalities for suspected fractures. Evaluating blood flow is not a primary use for MRI in the context of lower back pain, as other imaging modalities or specific MRI techniques would be more appropriate for vascular assessment.