Dexa Scan Test, Book Bone Density Test in Australia Today
A DEXA scan, short for Dual-Energy X-ray Absorptiometry, also commonly known as a bone density scan, is an imaging test using low-power X-rays to measure bone density, body fat, and lean muscle mass. If you're looking to schedule a DEXA scan in Australia, this precise and non-invasive test is widely accessible, offering valuable insights into your overall health.
Dexa Scan Test, Book Bone Density Test in Australia Today
What:
X-ray imaging test
Tests for:
Bone density and muscle mass
Referral:
Required
Average cost:
$150-200
Overview: DEXA Scan
What is DEXA and how does it work?
DEXA is a medical imaging technique used primarily for measuring bone mineral density. The scan uses two X-ray beams with different energy levels to measure bone density, making it a reliable tool for assessing bone health. A DEXA test can also be used as a DEXA test for body fat and body composition.
What does a DEXA scan check for?
A DEXA scan primarily checks for bone mineral density (BMD), typically at the hip, forearm and spine, where fractures are most likely to occur due to osteoporosis. However, it also doubles as a body composition scan, providing information on the distribution of fat, muscle and bone in the body.
What age is getting a DEXA recommended?
DEXA scans are generally recommended for women aged 65 and older and men aged 70 and older, as the risk of osteoporosis increases with age. However, at Everlab, members have the option of taking a bone density exam and body composition scan irrespective of age, as earlier screening may enable doctors to engage patients with preventative lifestyle treatments.
DEXA Test Details
How is a DEXA scan done?
DEXA scans are outpatient procedures, which means you won’t have to stay in the hospital. There are no needles or injections in this test, and you won’t feel any pain. You are required to remove all metal objects from your pockets and clothes, and may be required to wear a specific gown if this is not possible.
Here’s how the DEXA scan works:
- You’ll lie down on a special X-ray table.
- A radiographer will help position your body, sometimes using foam blocks to hold your body in the correct position.
- The technician will pass the DEXA scanning arm over your body that takes pictures of your bones. Technicians usually scan your hips and spine, but they may take scans of other bones throughout your body, too, like your forearms.
- The scan usually takes anywhere from 10 to 25 minutes depending on how many body parts get scanned.
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Is the radiation in a DEXA scan bad for you?
The radiation exposure from a DEXA scan is extremely low and is less than that of a standard chest X-ray and even a cross-country flight. It is approximately 20 micro-sieverts, which is a fraction of the exposure from other common medical imaging procedures like mammograms. Therefore, DEXA scans pose minimal risk in terms of radiation exposure.
Things to avoid before having a DEXA scan
Before having a DEXA scan you should try avoid the following to ensure accurate results:
- Calcium Supplements: Do not take calcium supplements for at least 24 hours before the test.
- Metal Objects: Avoid wearing clothing with metal zippers, buttons, or any metal accessories like jewellery. These can interfere with the accuracy of the scan.
- Recent Tests: If you have had a barium exam or have been injected with a contrast dye for a CT scan or radioisotope scan in the past two weeks, you should inform your technician. These substances can impact the test results.
- Heavy Exercise: Engaging in heavy exercise right before the scan might not be advisable as it could temporarily alter DEXA bone scan results.
Always follow specific instructions given by your healthcare provider or the testing facility.
Results & Follow Up
What do the results of a DEXA scan look like?
A typical 6-8 page report from a DEXA scan will provide detailed imaging of your Lumbar Spine, Right Hip, Left Hip, and overall body composition. For each bone group, you'll find both T and Z scores. T scores measure your bone density relative to the average healthy young adult and Z scores measure your bone density relative to your peer group. Positive T and Z scores indicate above-average bone density, while negative scores suggest below-average density.
The body composition analysis in the report will include your BMI (Body Mass Index), total body fat percentage, and an estimate of VAT (Visceral Adipose Tissue). It's important to review the results of your DEXA scan with your referring doctor to fully understand your bone health and body composition.
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What do I do if I have low bone density?
If you have below-average bone density, your referring doctor will suggest treatments to help keep your bones strong, including:
- Exercising more often: Regular physical activity strengthens your bones. Walking, yoga and strength training are great ways to stay active and prevent bone loss.
- Supplements or eating specific foods: Your provider might suggest that you take a vitamin D or calcium supplement to support your bone health. You might need to eat more foods high in certain vitamins and minerals.
- Medication: Your provider might prescribe medications that help slow down bone loss and prevent fractures. Some medications for osteoporosis may help build your bone density.
At Everlab we prescribe a full set of interventions designed to reduce your risk of exacerbating your current condition.
Benefits and Risks of a DEXA Scan
Like any medical procedure, a DEXA scan offers both clear benefits and a few minor risks. Understanding these can help you make an informed decision about whether this scan is right for you, whether you're investigating your bone health or tracking your body composition.
Benefits of a DEXA Scan
Quick and Noninvasive
One of the biggest advantages of a DEXA scan is how simple and comfortable it is. The scan itself typically takes 10 to 25 minutes. There are no needles, injections, or recovery time involved—just lie still while the scanner does its work. It’s a fast and painless way to collect detailed data about your body.
No Anaesthesia Required
Unlike certain diagnostic tests or procedures, a DEXA scan requires no anaesthetic or sedation. You remain fully awake and comfortable throughout the process, making it especially suitable for older adults or individuals who may be sensitive to medications.
Minimal Radiation Exposure
While a DEXA scan does use X-rays, the amount of radiation is extremely low, around 20 microsieverts. That’s less than a cross-country flight or a standard chest X-ray. This makes the scan safe enough for periodic monitoring, especially in populations at higher risk of bone loss or sarcopenia.
Highly Accurate Diagnosis
DEXA scans are considered the gold standard for assessing bone mineral density (BMD) and tracking changes over time. The same scan can also accurately assess body composition, measuring fat, muscle, and lean mass distribution, making it a dual-purpose tool for both medical and performance-focused individuals.
Guides Treatment and Monitoring
Results from a DEXA bone density scan or DEXA body composition scan can influence your care plan. Whether it’s prescribing vitamin D, adjusting a fitness regimen, or starting osteoporosis medication, this scan provides objective data that helps doctors and patients make smarter decisions. It’s also ideal for tracking progress over time—whether you're trying to lose fat, gain muscle, or maintain bone health.
Risks of a DEXA Scan
Minimal Cancer Risk
Because DEXA uses ionising radiation (albeit a very small amount), there is technically a minimal associated cancer risk. However, the exposure is so low that this risk is considered negligible, especially when compared to the benefits of early disease detection and monitoring.
Precautions for Pregnancy
If you are pregnant or suspect you might be, it’s important to let your healthcare provider know before scheduling a DEXA scan. Although the radiation dose is minimal, it’s standard medical practice to avoid unnecessary exposure during pregnancy, especially in the early stages.
Variable Radiation Doses
While all DEXA scans use low radiation, the exact dose can vary slightly depending on the machine and the number of areas being scanned. Scanning the full body for a body composition scan may involve a slightly higher—but still very safe—dose compared to a simple hip and spine bone density test.
No Expected Complications
For the vast majority of patients, a DEXA scan is completely safe with no side effects. You can return to normal activities immediately after the test, and there are no post-scan precautions required.
Sources
1. Better Health Channel - Bone density testing
https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/bone-density-testing
2. John Hopkins Medicine - Bone Densitometry
https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/bone-densitometry
3. National Institute of Health - Bone Mineral Density Tests: What the numbers mean
https://www.niams.nih.gov/health-topics/bone-mineral-density-tests-what-numbers-mean
4. UC Davis Health - DXA body composition analysis
https://health.ucdavis.edu/sports-medicine/resources/dxa-info
Why should you get a DEXA scan done?
Early detection of low bone density and poor muscle mass allows ample time (10-30 years) for lifestyle changes that can strengthen your bones and muscles to prevent osteoporosis and other musculoskeletal diseases. Whether you're curious about your fat percentage or concerned about osteoporosis, a DEXA bone scan and body composition scan provides clarity. Don’t wait—book a DEXA scan test today.
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