The Echolight REMS test is a radiation free test for bone density now offered in the United States.  It has been offered in Europe since 2010. 

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What is the Echolight REMS

Echolight REMS is a non-invasive bone health test designed to evaluate bone density and quality.  REMS stands for radiofrequency echographic multi-spectrometry. Unlike DEXA scans, which measure bone mineral density (BMD) using X-ray technology, Echolight REMS employs ultrasound waves to assess bone characteristics, including density, microarchitecture, and strength.

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Key Differences Between REMS and DEXA

• DEXA Scans measure bone mass density by using X-ray beams. The resulting images provide information about bone density and risk of fracture.

• Echolight REMS utilizes ultrasound waves to evaluate bone properties, including density, microarchitecture, and biomechanical properties.

• DEXA scans are considered the gold standard in the US for measuring BMD and assessing fracture risk but do not assess bone quality or structure.

• Echolight REMS offers a more comprehensive evaluation of bone health by assessing multiple parameters, including density, structure, and strength. It provides insights into bone quality, which may be valuable for predicting fracture risk, particularly in conditions like osteoporosis.

• According to a 2021 study the precision error of REMS (root-mean-square coefficient of variation) was 0.32% for the femoral neck and 0.38% for the lumbar spine, which is a much smaller error compared with that of DEXA (estimated to be 1.47% for the femoral neck and 1.26% for the spine).  

• DEXA scans involve exposure to low levels of ionizing radiation, although the dose is minimal compared to other imaging techniques. However, repeated exposure over time may pose concerns, especially for certain patient populations. REMS can be used during pregnancy to assess bone health.

• REMS scans can be done in a doctor’s office setting.

• REMS testing locations are very limited in the United States and are not yet covered by insurance.