What type of machine is commonly used to perform DXA scans?

• A. A bone densitometer
• B. An MRI scanner
• C. A CT scanner
• D. An ultrasound machine

Answer: (A)

The correct answer is a bone densitometer, which is specifically designed for performing Dual-energy X-ray Absorptiometry (DXA) scans. DXA is a specialized imaging technique used primarily to measure bone mineral density (BMD) and assess the risk of osteoporosis and fractures. A bone densitometer utilizes low-dose X-rays to differentiate between bone and soft tissue, allowing for precise measurements of bone density.

Other machines, such as MRI scanners, CT scanners, and ultrasound machines, are used for different medical imaging purposes. MRI and CT scanners are generally employed for visualizing soft tissues and organs rather than measuring bone density. Ultrasound machines utilize sound waves for imaging and are not suitable for assessing bone density. Therefore, the bone densitometer is the only equipment in the options provided that is tailored for DXA scanning.