Bone Density Tests – An Overview
Bone density tests are an important element in helping evaluate bone health relating to risks of fractures and in assessing osteoporosis development.
A bone density test measures the mineral density of the bone. The bone density test measurement result provides a quantitative indication of the amount of mineral in the bone but does not provide a clear indication regarding the bone strength or fragility. The tests are used by physicians to help them diagnose and monitor osteoporosis and are an important tool in the fight against osteoporosis.
Physicians use bone density tests in association with consideration of a variety of clinical risk factors, including:
- Sex, age, height and weight of the patient
- Previous fractures
- Hip fractures among parents
- Smoking habits
- Associated conditions such as rheumatoid arthritis
- Alcohol consumption
Standard Bone Density Test
Traditionally, Dual Energy X-ray Absorptiometry (DXA) technology is used for bone density tests. It provides a measurement of the amount of mineral in the bone. Bone mineral density loss, identified through a DXA bone density test, provides an indication of bone status.
Drawbacks of DXA Bone Density Testing
While DXA bone density tests are perceived as the gold standard, the systems are large, room-sized equipment that are expensive to purchase and operate. Bone density tests performed with DXA expose patients to radiation. Repeated X-ray exposure, even in low doses is not optimal, therefore DXA-based bone density tests ideally should not be frequently and repetitively performed on the same patient more than once every two to three years
Quantitative Ultrasound – An Alternative to Bone Density Tests for Early Assessment and Monitoring of Osteoporosis
An affordable, convenient and radiation-free alternative to bone density tests using DXA is to use quantitative ultrasound to gain a measure of skeletal fragility, which assists physicians in diagnosing and monitoring osteoporosis.
As a leading developer of quantitative ultrasound-based systems, Beammed is leading the way in helping fight osteoporosis. Beammed’s Sunlight products, which utilize proprietary Omnipath Axial Transmission Technology, provide valuable information for early assessment of osteoporosis. In this way, they provide a proven, effective alternative to bone density tests, particularly where cost or geographic isolation make DXA bone density tests inaccessible to specific patient populations.
Sunlight devices provide a quantitative measurement of the velocity of ultrasonic waves propagating along the bones – i.e. Speed of Sound, or SoS, in m/sec – and thus can be used to gain a measure of skeletal fragility.
Expressed in both SoS m/sec and as a Z score and a T score, the output results can be used in conjunction with other clinical risk factors to assist physicians in the diagnosis of osteoporosis and other medical conditions leading to reduced bone strength, and, ultimately, in the determination of fracture risk.
SoS is accurate enough to make it suitable for monitoring bone changes which occur during the years of accelerated growth and in the early years following menopause – providing an x-ray-free alternative to DXA bone density tests.