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Does a DEXA Scan Use Radiation?

Updated
11/6/24
Written by:

Elmira Dunn

A DEXA scan, or dual-energy X-ray absorptiometry scan, does involve a small amount of radiation. However, the radiation dose itself is minimal and considered safe, making it a commonly used method for measuring bone density and assessing osteoporosis risk. Read on and discover if DEXA procedures are dangerous or not.

Understanding Bone Density Scan

A DEXA scan, or dual-energy X-ray absorptiometry scan, is a specialized imaging technique used to measure bone mineral density. It provides valuable information about bone health, helping to assess the risk of osteoporosis and fractures. The scan is quick and non-invasive, using low levels of radiation to see bone density test obtain precise measurements. Regular DEXA scans are particularly important for individuals at higher risk for bone density loss, including postmenopausal women, older adults, and those with certain medical conditions.

The history of DEXA scanning dates back to the late 1980s when it was developed as an advanced method for evaluating bone density. Early bone density tests were limited in accuracy and could only measure specific areas of the body. DEXA revolutionized this field by providing a more comprehensive assessment, enabling healthcare providers to identify bone health issues earlier and more accurately. Since its introduction, DEXA scans have become the gold standard for diagnosing osteoporosis and have played a critical role in the management of bone health globally.

Do DEXA Scans Have Radiation?

A DEXA scan involves a small amount of radiation; however, the levels are minimal and generally considered safe for most patients. This non-invasive procedure primarily uses X-rays to measure bone density, helping assess the risk of osteoporosis and fractures.

How Is Radiation Exposure Measured?

Radiation exposure from medical imaging is typically measured in millisieverts (mSv). A DEXA scan typically exposes patients to about 0.001 to 0.01 mSv, which is significantly lower than radiation protection from other imaging tests, such as X-rays or CT scans.

How Much Radiation Is in a Bone Scan?

The radiation exposure from a DEXA scan is roughly equivalent to the amount of natural background radiation a person receives in a day or the amount of radiation from eating four bananas. This minimal exposure makes DEXA scans a preferred method for monitoring bone health.

Radiation Exposure Levels Source
1-4 uSv Usage of DEXA scans (for individuals of appropriate size) to measure bone density, muscle mass, and fat content.
8 uSv Daily exposure to background radiation is a natural occurrence. This radiation originates from sources like cosmic rays, the Earth's surface, buildings, food, and medical procedures.
10uSv Flight between Sydney and Brisbane
40 uSv Sydney-to-LA flight
60 uSv X-ray of the chest
400 uSv Mammogram
1.5-1.7 mSv
(1,500-1,700 uSv)		 Typical yearly radiation exposure for flight crew
2 mSv
(2,000 uSv)		 Brain CT scan
5-6 mSv
(5,000-6,000 uSv)		 Chest CT
1 Sv
(1,000,000 uSv)		 The radioactive water leaking from Fukushima's Reactor 2 contains harmful levels of radiation. While direct exposure can lead to short-term symptoms, it's also associated with a higher risk of developing cancer in the future.

What Are the Side Effects of a Radioactive Bone Scan?

Side effects from a DEXA scan are rare due to its low radiation levels. Most patients experience no adverse effects, although some may feel slight discomfort from lying still during the scan. Overall, the benefits of assessing bone health far outweigh the minimal risks associated with radiation.

Medical Research: Is DEXA Scan Safe

Prioritize Your Bone Health: Schedule Your Safe and Effective DEXA Scan Today

Prioritize your bone health by scheduling your safe and effective DEXA scan today at Osprey PolyClinic. Our experienced team is dedicated to providing top-notch care in Sarasota and SW Florida, ensuring you receive the best possible assessment of your bone density. Don’t wait — take a proactive step toward your health! Book your appointment at Osprey PolyClinic and secure your DEXA scan today.

FAQ About DEXA Scan Safety

Is DEXA scan safe in pregnancy?

DEXA scans are generally not recommended during pregnancy due to the minimal radiation exposure involved. If bone density testing is necessary, healthcare providers typically explore alternative methods that do not involve radiation. Always consult your doctor if you are pregnant and considering a DEXA scan.

How many DEXA scans per year are safe?

The frequency of DEXA scans depends on individual risk factors for bone density loss. For most patients, a scan every 1-2 years is adequate, but those with significant risk factors for bone density scans may require more frequent monitoring. Consult your healthcare provider for personalized recommendations.

Is DEXA scan safe for children?

DEXA scans can be safe for children when medically necessary. However, the decision should be made by a healthcare professional, weighing the benefits against potential risks. It’s essential to discuss any concerns with your child’s doctor.

Is pacemaker safe for DEXA scan?

Yes, a DEXA scan is safe for individuals with pacemakers. The low radiation levels used in DEXA scans do not interfere with pacemaker function.
Elmira Dunn
Elmira Dunn

FAQs

  • How often does Medicare cover screening mammograms?

    Medicare Part B covers annual screening mammograms for women aged 40 and older. These screenings are essential for early detection of breast cancer and are provided at no cost if your healthcare provider accepts Medicare assignment.

  • Does Medicare cover 3D mammograms?

    Yes, Medicare covers 3D mammograms, also known as digital breast tomosynthesis, under the same conditions as conventional mammograms. These provide a more detailed view of breast tissue and are covered if deemed medically necessary.

  • Does Medicare pay for mammograms after 70?

    No, Medicare does not have an age limit for mammogram coverage. Women aged 40 and older are eligible for annual screening mammograms, and diagnostic mammograms are covered if medically necessary, regardless of age.

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