DXA (dual-energy X-ray absorptiometry) and Echolight are both methods for measuring bone density, but they differ in a few ways...
DEXA uses small amounts of ionizing radiation to capture images of the body, while Echolight uses ultrasound waves and is radiation-free.
Echolight is more accurate and sensitive than DEXA at detecting changes in bone mass.
REMS scans, which are used by Echolight, can provide more information about bone quality than DEXA scans.
DEXA scans can be error-prone, especially if they are not performed or interpreted correctly.
DEXA scans may not be useful for people with spinal deformities or those who have had spinal surgery.