7 doctors weighed in:

What is the difference between a DEXA bone density scan and x-ray?

7 doctors weighed in
Dr. Robert Lang
Internal Medicine - Endocrinology
3 doctors agree

In brief: Dose and accuracy

The dexa uses a very small dose of x-ray compared to a regular x-ray and it is designed to measure density not produce a high quality picture.
A regular x-ray is designed to produce a high quality picture and is a poor measure of density.

In brief: Dose and accuracy

The dexa uses a very small dose of x-ray compared to a regular x-ray and it is designed to measure density not produce a high quality picture.
A regular x-ray is designed to produce a high quality picture and is a poor measure of density.
Dr. Robert Lang
Dr. Robert Lang
Thank
Dr. Georgianne Snowden
Radiology - Interventional
1 doctor agrees

In brief: DEXA uses CT

A dexa scan uses cat scan and measures absorption of the x-ray to come up with a bone density measurement that can then be compared to age-matched normals.
X-ray is a simple radiograph that makes an image, but is not able to quantitate bone density.

In brief: DEXA uses CT

A dexa scan uses cat scan and measures absorption of the x-ray to come up with a bone density measurement that can then be compared to age-matched normals.
X-ray is a simple radiograph that makes an image, but is not able to quantitate bone density.
Dr. Georgianne Snowden
Dr. Georgianne Snowden
Thank
1 comment
Dr. Michael Gabor
DEXA is different from CT bone densitometry. DEXA does not use CT. DEXA computes bone density by measuring the differences in attenuation between 2 X-ray beams of differing energy(Dual Energy, the DE in DEXA) after they pass through the body, usually the hip and spine for standard exam.
Dr. Michael Gabor
Diagnostic Radiology

In brief: Nothing

The DEXA scan actually uses two low dose X-rays of different energy.
By measuring the differences in how they are absorbed, bone density can be calculated.

In brief: Nothing

The DEXA scan actually uses two low dose X-rays of different energy.
By measuring the differences in how they are absorbed, bone density can be calculated.
Dr. Michael Gabor
Dr. Michael Gabor
Thank
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