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BMD Test Sem 4 Questions & Answers 2025/2026

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BMD Test Sem 4 Questions & Answers 2025/2026

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BMD Test Sem 4 Questions & Answers
2025/2026

DXA (Dual Energy X-ray Absorptiometry) - ANSWERSMeasure of bone density in optimizing the
differentiation of the attenuation between bone and soft-tissue (dual energy)



GE Lunar and Norland - ANSWERSEarth filtered x-rays to produce energy peaks near 40keV and
70keV with an average peak near 50keV. Needs daily calibration



Hologic Scanner - ANSWERSEnergy switching that sychronously switches potential between
100kVp and 140kVp. Energy peaks near 40keV and 80keV



DXA Results - ANSWERSPropriety bone algorithms are applied and measures two dimensional
area. Average area is calculated



DXA Results (Values) - ANSWERSBMD=BMC/Area

-Area (cm2)

-BMC (g)(bone mineral content)

-BMD (g/cm2)



Z-Score - ANSWERSIndication of the standard deviation from the patient BMD to the standard
BMD of the respective age and sex group



T-Score - ANSWERSIndication of standard deviation from the young, normal, sex-matched
individual with peak bone mass



Z-Score Formula - ANSWERSMeasured BMD-age matched mean BMD/age matched SD
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