Dual-Energy X-Ray Absorptiometry Scanning in Practice, Technical Aspects, and Precision Testing.

Area of Science:

• Osteoporosis and Bone Health
• Medical Imaging Technology
• Diagnostic Medicine

Background:

• Bone densitometry has significantly evolved over the past 30 years.
• Osteoporosis diagnosis relies on bone mineral density (BMD) T-scores, with thresholds defined for specific populations.
• Dual-energy X-ray absorptiometry (DXA) is a primary tool for BMD measurement.

Purpose of the Study:

• To review the diagnostic criteria for osteoporosis using BMD T-scores.
• To highlight the importance of selecting appropriate normative databases for DXA interpretation.
• To discuss the broader applications of DXA beyond BMD assessment.

Main Methods:

• Review of diagnostic criteria for osteoporosis based on BMD T-scores.
• Discussion of normative database selection in DXA for diverse populations.
• Exploration of advanced DXA applications.

Main Results:

• Osteoporosis diagnosis criteria using BMD T-scores are established for postmenopausal women and men aged 50+.
• The choice of normative database (e.g., Caucasian, non-race adjusted) impacts BMD categorization.
• DXA offers additional assessments including trabecular bone score, hip structural analysis, vertebral fractures, and body composition.

Conclusions:

• Accurate osteoporosis diagnosis requires judicious selection of DXA reference databases, considering regional and ethnic factors.
• Regular quality control of DXA systems is essential for reliable results.
• DXA is a versatile tool with applications extending beyond BMD to comprehensive skeletal and body composition analysis.