Bone Mineral Density by Quantitative Computed Tomography (QCT) with Spine Analysis

What This Test Measures

Bone mineral density (BMD) is a measure of how much mineral (primarily calcium) is stored in your bones. This test specifically focuses on the vertebrae in your spine, which are critical for supporting your upper body and absorbing impact. Lower BMD may indicate weaker bones, increasing fracture risk.

Why It’s Done

Your healthcare provider may order this test if you have symptoms like back pain, height loss, or a family history of osteoporosis. It’s also used to evaluate bone health before surgery, during treatment for bone-related conditions, or as part of routine screening for older adults or those at higher risk.

How the Test Works

You’ll lie down on a table while a CT scanner takes precise images of your spine. The scanner uses X-rays to create detailed cross-sectional images of your vertebrae, measuring bone density in specific areas. The results are compared to standard values to determine your bone health status.

What to Expect Before the Test

No special preparation is needed, but you may be asked to remove jewelry, clothing, or metal objects that could interfere with the scan. Wear comfortable clothing, and let your provider know if you’re pregnant or have any metal implants (e.g., pacemaker, surgical clips).