Dual-Energy X-ray Absorptiometry (DEXA)

Definition

Dual-Energy X-ray Absorptiometry, commonly known as DEXA, is a medical imaging test used to measure bone mineral density as well as body composition, including fat and muscle mass.

Scientific / Technical Definition

Dual-Energy X-ray Absorptiometry (DEXA) is a highly precise and non-invasive imaging technique that utilizes two low-dose X-ray beams at different energy levels to quantify bone mineral density and differentiate between bone mass, fat tissue, and lean body mass. It is a gold standard for assessing osteoporosis and is also used extensively in research and clinical assessments of body composition.

Benefits

• Provides accurate measurement of body fat percentage.
• Determines bone mineral density, helping to diagnose osteoporosis.
• Tracks changes in body composition over time.
• Helps in assessing the risk of fractures.

Examples

• Clinical assessment of patients with osteoporosis risk.
• Body composition analysis for athletes.
• Weight management programs to monitor fat loss and muscle gain.

Additional Information

• effects: DEXA scans help in monitoring changes in body composition, providing essential data on fat, bone, and muscle mass changes which can guide nutritional and exercise interventions.

Related Terms

• Body Mass Index (BMI)
• Bone Density
• Fat Mass
• Lean Body Mass
• Body Composition

References

• Understanding DEXA Scans for Bone Health
• The Role of Dual-Energy X-ray Absorptiometry in Medical Practice