Is dual-energy X-ray absorptiometry accurate?
Dual-energy X-ray absorptiometry (DXA) is a precise, accurate, non-invasive, safe, and convenient technique, founded on a three compartment model separating the body into total body mineral mass (TBBMC), FM, and lean tissue mass (LTM), the latter being the remaining bone-free fat-free tissue mass [2,3].
What is a dual-energy X-ray absorptiometry test?
Dual-energy X-ray absorptiometry (DXA) is a test that uses two different X-ray beams to check bone thickness (density) in your spine and hip.
Why is dual-energy X-ray absorptiometry DXA used as a standard of comparison for all other body composition tests?
For the measurement of both bone and soft tissue masses, there are several advantages of DXA: (1) it provides reliable and precise data; (2) the data acquisition process is fast, easy to perform, involves minimal radiation exposure, and is easily tolerated by subjects; (3) the data analysis process is fast, versatile.
How accurate is DEXA scan for body fat?
The error rates vary by what study you look at and which DEXA machine was used; error rates range from 4% in one study to up to 8-10% in another study. Also, the accuracy of DEXA can be affected by sex, size, fatness, and disease state of subjects.
Is a DEXA scan a bone scan?
A bone density scan uses low dose X-rays to see how dense (or strong) your bones are. You may also hear it called a DEXA scan. Bone density scans are often used to diagnose or assess your risk of osteoporosis, a health condition that weakens bones and makes them more likely to break.
What was DEXA originally designed for?
bone mineral content
DXA scanners were originally designed to measure bone mineral content and density, though software developments during the 1990s also permitted the estimation of soft tissue masses.
Can you wear a bra for bone density test?
Shoes will be removed for exam. Do not wear jewelry, hearing aids, belt buckles, zippers, snaps, or buttons. Females should wear a sports bra. Bras with under wires will need to be removed.
Can I drink coffee before a bone density test?
Before a Bone Densitometry Scan If you think you may be pregnant, notify your doctor before getting a bone densitometry scan. You do not have to change your daily routine before this test. Eat, drink, and take any medications as you normally would.
What is DXA used for?
Bone density scans, also known as DEXA scans, help to work out your risk of breaking a bone. They’re often used to help diagnose bone-related health problems, such as osteoporosis, or to assess the risk of getting them.
How much does a DEXA scan cost?
A DEXA scan costs about $125. And if your doctor prescribes a drug when you only have mild bone loss, you spend money you don’t need to. A month’s supply of generic alendronate can cost as much as $75.
Is DEXA scan worth it?
A DEXA scan is a type of medical imaging test. It uses very low levels of x-rays to measure how dense your bones are. DEXA stands for “dual-energy X-ray absorptiometry.” Medical experts consider DEXA scans to be the most useful, easy, and inexpensive test for helping to diagnose osteoporosis.
Can a DEXA scan show a tumor?
While a DEXA scan isn’t typically used to diagnose cancer, it can provide your care team with important information to help them determine whether additional testing is needed. Using low levels of X-rays, the DEXA scan examines the entire skeleton or specific points on the body, such as the spine or hip.