ONCB Metabolic, Inflammatory, Tumors Practice Exam 2025 – Complete Prep Guide

The primary imaging method utilized for assessing bone density is dual-energy X-ray absorptiometry, commonly referred to as DEXA. This method is specifically designed to measure bone mineral density (BMD) and is considered the standard in the evaluation of osteoporosis and other conditions affecting bone health. DEXA scans use low doses of ionizing radiation to produce images, allowing for accurate measurement of bone density at various sites, typically the lumbar spine and hip, which are critical in assessing fracture risk.

In contrast, other imaging methods such as magnetic resonance imaging (MRI) and computed tomography (CT) do not focus on bone density assessment. MRI is primarily used for soft tissue evaluation and can visualize bone marrow changes but is not reliable for measuring BMD. CT scans provide detailed cross-sectional images of the body and can be beneficial for assessing complex bone structures and certain lesions but are not typically employed for routine bone density measurements due to higher radiation exposure and cost.

Ultrasonography has applications in various fields of medicine, including musculoskeletal assessments, but it does not provide quantifiable measurements of bone density comparable to DEXA. Therefore, DEXA remains the gold standard for determining bone density and is widely recommended in clinical practices for diagnosing and monitoring osteoporosis.