DEXA Cheat Sheet 2026

The 30 highest-yield DEXA facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. When conducting a risk assessment for DEXA operations, which factor should receive the HIGHEST priority? → Probability and severity of potential harm
2. A DEXA technologist calculates an in-vivo spine precision of 1.8% RMS-CV. What is the least significant change (LSC) at 95% confidence? → ~5.0%
3. What is the recommended minimum number of repeat scans used to calculate an in-vivo precision assessment for a DEXA technologist? → 30 patients scanned twice or 15 patients scanned three times
4. Which DEXA QA action should be performed if the daily phantom scan image shows unusual artifacts or distortion? → Halt patient scanning, document findings, and contact the service engineer
5. Which statistical tool is typically used to track DEXA daily phantom data over time and identify trends? → Shewhart control chart (QC chart)
6. When comparing DXA body composition results across serial scans, the technologist should ensure: → The same DXA system and software version are used for each scan
7. What is precision in DEXA scanning? → Reproducibility of results
8. In DEXA Bone Density Scan Certification, what is the PRIMARY purpose of conducting an initial assessment? → To establish a baseline and identify needs for appropriate action
9. What should patients remove before a DEXA scan? → All metal objects
10. What is the function of osteoclasts? → Bone resorption
11. Which lab values are most important to review before initiating bisphosphonate therapy in a patient with low bone density? → Serum creatinine/eGFR (renal function) and 25-hydroxyvitamin D
12. In DEXA Bone Density Scan Certification practice, what is the CORRECT sequence when performing a technical procedure? → Plan, prepare, execute, verify, and document
13. How long should a DEXA technologist wait before performing a follow-up BMD scan to assess treatment response for a patient on bisphosphonate therapy? → At least 1–2 years after initiating therapy
14. The EWGSOP2 (European Working Group on Sarcopenia in Older People) recommends which DXA-based cutoff for low appendicular lean mass index (ALM/ht²) in men? → Less than 7.0 kg/m²
15. In DEXA Bone Density Scan Certification practice, what is the CORRECT sequence when performing a technical procedure? → Plan, prepare, execute, verify, and document
16. What does a T-score represent? → Comparison to young adult average
17. In DEXA Bone Density Scan Certification, what is the PRIMARY purpose of conducting regular safety drills and exercises? → To ensure personnel can respond effectively in emergencies
18. Which class of medications is most commonly prescribed as first-line pharmacotherapy for postmenopausal osteoporosis in the US? → Bisphosphonates (e.g., alendronate, risedronate)
19. What role does calibration play in maintaining technical accuracy for DEXA Bone Density Scan Certification professionals? → It ensures instruments produce accurate, consistent results over time
20. Which measurement is used to evaluate in-vitro precision of a DEXA scanner? → Root mean square coefficient of variation (RMS-CV%)
21. What T-score indicates osteoporosis? → Below -2.5
22. What is ALARA in radiation safety? → As Low As Reasonably Achievable
23. Which assessment method provides the MOST reliable data for DEXA professionals making critical decisions? → Standardized tools combined with professional observation
24. What role does calibration play in maintaining technical accuracy for DEXA Bone Density Scan Certification professionals? → It ensures instruments produce accurate, consistent results over time
25. Which regulatory requirement is UNIVERSAL across all DEXA Bone Density Scan Certification practice settings? → Maintaining current certification and continuing education
26. What structure covers the bone surface? → Periosteum
27. What is the BEST way for a DEXA Bone Density Scan Certification professional to stay current with regulatory changes? → Monitor regulatory bodies, attend CE, and participate in professional associations
28. What tool assists with scan interpretation? → Reporting software
29. In DEXA Bone Density Scan Certification practice, what is the FIRST step when a safety hazard is identified in the workplace? → Immediately secure the area and report the hazard
30. What is the recommended DEXA monitoring interval for patients on long-term glucocorticoid therapy? → Every 1–2 years for patients on ongoing glucocorticoid therapy