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Doctor insights on: How Does A Dexa Scan Work

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How does a DEXA scan work?

How does a DEXA scan work?

Sending two waves: The dxa (stands for dual-energy x-ray absorptiometry) machine sends beams of low-radiation x-rays with "two" distinct energy waves (hence the name dual) through the bones being scanned. One wave is absorbed mainly by soft tissue and the other by bone. The soft tissue amount can be subtracted from the total and what remains is a patient's bone mineral density. Hope this helps ! ...Read more

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What is a DEXA scan used for?

What is a DEXA scan used for?

Bone density: Measuring bone density and comparing it to age matched and young adult averages. Low bone density(osteopenia, osteoporosis) can be diagnosed. Relative fracture risk can be estimated. Treatment for low bone density can be assessed with DEXA. ...Read more

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What is the difference between a qct and a DEXA scan?

What is the difference between a qct and a DEXA scan?

Different methods: Qct is quantitative computerized tomography. It uses calibration to measure bone density with a ct. It is very accurate, but does expose you to a fair dose of radiation, limited the number of times it should be done over the course of life. Dexa is dual energy x-ray absorptiometry is like a low dose x-ray. It too gives bone density, but since the radiation dose is lower, it can safely be repeated. ...Read more

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Would like to know if it's needed to be weighed for a DEXA scan?

Would like to know if it's needed to be weighed for a DEXA scan?

No: Table for scan has weight limit of 350 pounds. If unable to lie on an examination table, it will not be possible to measure spine and hip bone density. Instead, sitting beside the DEXA machine for scan of forearm. ...Read more

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My DEXA scan z score is -2.6 what does this mean exactly ?, I am 53.

Low: Z score compares your bone density to the average of your age group. If it is a positive number, you have above average bone density. If negative, below. The actual number represents the "standard deviations" from the mean, how far away from average you are. For -2.6, it means that you are approximately in the lower 3% for bone density for your age. That is, 97% have higher bone density than u ...Read more

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Can DEXA scan detect osteomalacia?

Can DEXA scan detect osteomalacia?

Osteomalacia: No. A Dexa detects osteoporosis, or decreased amount of bone matrix. Osteomalacia is an abnormal type of bone, soft bones, abnormal building process. You can have both osteoporosis/malacia, so dexa is still done in the workup to measure the amount of bone. Vit D deficiency, GI disorders that cause malabsorption, kidney disease, liver disease, certain drugs... all are part of the differential. ...Read more

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Do they weigh you when you get a DEXA scan?

DEXA: Several items: 1: Why do you want one at age 30? If you don't need a DEXA but insist, you will have a big bill. 2: Please make sure that the bone density technician has taken a formal DEXA training study. If not I don't have much reliability on the study. ...Read more

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Can the DEXA scan reports useful for my doctor?

Can the DEXA scan reports useful for my doctor?

Yes...: DEXA report will tell if your bone density is normal, slightly low (osteopenia), or very low (osteoporotic) and if treatment is needed. ...Read more

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