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What to Expect of a DXA Scan
Introduction to DXA Scans
A Dual-Energy X-ray Absorptiometry (DXA) scan is commonly used in the United Kingdom to measure bone mineral density (BMD). This diagnostic tool is crucial for assessing conditions such as osteoporosis and for evaluating fracture risk. It provides precise data by using low-dose X-rays to measure the amount of calcium and other minerals in a segment of bone.Before the Scan
Before undergoing a DXA scan, you typically won't need to follow any specific dietary restrictions. However, it is essential to inform your healthcare provider if you have recently had any procedures involving barium or if you've taken any calcium supplements, as these could affect the scan's accuracy. Wearing loose, metal-free clothing is recommended to prevent interference with the X-ray images.The Scan Process
Upon arrival, you will be asked to lie on a padded table. The scanner will pass over your lower spine and hips, though sometimes the forearm is scanned if the spine or hip cannot be scanned. The process is non-invasive, meaning no injections or incisions are involved. During the scan, you'll need to stay still to ensure clear and precise images. Most DXA scans are completed within 10 to 20 minutes.What to Expect During the Scan
The DXA scan is pain-free, and while you may hear some mechanical noises from the scanner, it doesn’t cause discomfort. The low-level X-rays used in the scan expose you to minimal radiation—much less than a standard chest X-ray. The technologist operating the machine will be in a separate room but will be able to communicate with you throughout the procedure.After the Scan
There is no recovery period needed following a DXA scan, so you can return to your daily activities immediately. Your results will typically be analyzed by a radiologist or a specialist. The findings will be shared with your referring healthcare provider, usually within a week. Based on your BMD results, your doctor will discuss any necessary lifestyle changes, medications, or follow-up tests.Conclusion
A DXA scan is a safe, quick, and effective method to evaluate bone health. Understanding what to expect can help alleviate any concerns and ensure you are prepared for the procedure. This diagnostic tool plays a vital role in detecting and managing bone-related conditions, helping you maintain optimal health.Frequently Asked Questions
What is a DXA scan?
A DXA (Dual-energy X-ray Absorptiometry) scan is a medical imaging test designed to measure bone density and assess the risk of fractures. It can also be used to measure body composition, such as the amount of fat and muscle in your body.
Why might I need a DXA scan?
You might need a DXA scan if you are at risk of osteoporosis, have had a recent fracture, or have a condition or are taking medications that can affect bone health. It is also used for body composition analysis in certain health assessments.
Is a DXA scan safe?
Yes, a DXA scan is safe. It uses very low levels of radiation, significantly lower than a standard X-ray, to obtain accurate readings.
How do I prepare for a DXA scan?
Preparation is minimal. However, you should avoid taking calcium supplements for 24 hours before the scan. Wear loose, comfortable clothing and avoid garments with metal fastenings or zips.
How long does a DXA scan take?
A DXA scan typically takes about 10 to 20 minutes to complete, depending on the areas of the body being examined.
What happens during a DXA scan?
During a DXA scan, you will lie on your back on a flat, open X-ray table. The scanner will pass over your body, usually focusing on your hip, spine, and in some cases, your forearm.
Does a DXA scan hurt?
No, a DXA scan is painless and non-invasive. You will need to stay still during the scan to ensure accurate results.
Who will perform my DXA scan?
A trained radiographer or technician will perform the scan. The results are usually reviewed and interpreted by a specialist, such as a radiologist or an endocrinologist.
When will I get my DXA scan results?
You will usually receive your results within a few days to a week, depending on the healthcare facility. Your doctor will discuss the results with you.
Will my DXA scan be covered by the NHS?
In the UK, DXA scans are generally covered by the NHS if medically necessary. If the scan is for body composition analysis or other uses not covered by the NHS, you may need to pay privately.
Can I eat or drink before a DXA scan?
Yes, you can eat and drink normally before a DXA scan, but avoid taking calcium supplements for 24 hours before the test.
What should I wear to a DXA scan?
Wear loose, comfortable clothing without metal zips, buttons, or hooks. You may be asked to change into a hospital gown if your clothing interferes with the scan.
Is there any risk associated with a DXA scan?
The risks are minimal as it uses very low doses of radiation. However, let your doctor know if you are pregnant as radiation exposure should be avoided during pregnancy.
Can children have a DXA scan?
Yes, children can have a DXA scan if needed. However, the decision to perform a scan on a child will depend on the specific medical circumstances and should be discussed with a healthcare provider.
How often should I have a DXA scan?
The frequency of DXA scans depends on your individual risk factors and medical history. Your doctor will provide guidance on how often you need the scan based on your health needs.
Useful Links
Useful links from: Patient video: What to expect when having a bone scan
- NHS - Bone scan Comprehensive information about bone scans, including what they are used for, how you prepare, and what happens during and after the procedure.
- NHS - Diagnostic Imaging: Bone Scan Official NHS video detailing what to expect during a bone scan, including preparation, the scan itself, and post-scan instructions.
- Macmillan Cancer Support - Bone Scans Detailed information provided by Macmillan Cancer Support about bone scans, their purpose, and the process, specifically for cancer patients.
- Cancer Research UK - Bone scan Explanation of what a bone scan is, why it might be needed, how it is performed, and what the results might mean related to cancer diagnostics.
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