Dual-energy X-ray Absorptiometry (DEXA)

Definition

DEXA is a medical imaging technique used to measure bone density and body fat percentage. It uses low-level X-rays to provide detailed information about body composition.

Scientific / Technical Definition

Dual-energy X-ray absorptiometry, commonly referred to as DEXA, is an advanced imaging technique that employs two X-ray beams at different energy levels to create images of the bone and body composition. This non-invasive method is considered the gold standard for assessing bone mineral density (BMD) and is also used to measure fat mass, lean body mass, and total body fat percentage with high precision.

Benefits

• Accurate measurement of bone mineral density.
• Provides precise estimates of body fat percentage.
• Helpful in diagnosing conditions like osteoporosis.
• Assists in tracking body composition changes over time.

Examples

• Getting a DEXA scan at a medical facility to assess bone health.
• Using DEXA results to guide weight management and fitness plans.

Additional Information

• sideEffects: DEXA is a safe procedure with minimal radiation exposure, comparable to natural background radiation. However, it should be performed by trained personnel to ensure accuracy and safety.

Related Terms

• Body Composition
• Bone Density
• Osteoporosis

References

• DXA (Dual-energy X-ray Absorptiometry) | Healthdirect
• Use of Dual-energy X-ray Absorptiometry in Clinical Practice