
A CT scan, commonly referred to as a CAT scan, is a type of X-ray that produces cross-sectional images of a specific part of the body. In the case of a lumbar spine CT scan, your doctor can see a cross-section of your lower back. The scanning machine circles the body and sends images to a computer monitor, where they are reviewed by a technician.
The lumbar portion of the spine is a common area where back problems occur. The lumbar spine is the lowest portion of your spine. It’s made up of five vertebral bones. Below the lumbar spine is the sacrum and below the sacrum is the coccyx (tailbone). Large blood vessels, nerves, tendons, ligaments, and cartilage are also part of the lumbar spine.