| COMMENTS |
Quantitative ultrasound (QUS) is an ultrasound technique that is used for the ev
ight-matched references, depending on the manufacturer. [PMID: 29541626]
aluation of osteoporosis. One transducer is placed on either side of a bone, whe
re one transmits ultrasound waves and the other receives them. QUS parameters in
clude broadband ultrasound attenuation (BUA), which is expressed in decibel per
megahertz, and speed of sound (SOS), which is expressed in meters per second. SO
S is correlated with bone mineralization. BUA and SOS can be further used to der
ive variables including stiffness index, QUS index, amplitude-dependent speed of
sound (AD-SoS), and bone transmission time (BTT). Results are reported as a per
centage comparing patient values to reference values based on young adults or we
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