1 Complete the requirements of at least one major degree program. 2  Complete at least 120 semester hours (some degree programs require more than 120 hours). 3  Complete at least 60 semester hours at Rice University.4  Complete at least 48 hours of all degree work in upper-level courses (at the 300 level or higher). Complete the requirements of at least one major degree program. 2  Complete at least 120 semester hours (some degree programs require more than 120 hours). 3  Complete at least 60 semester hours at Rice University.
X-rays are waves of electromagnetic radiation that are absorbed differently by different tissues. Bones absorb them well because they are dense. A skeletal X-ray specifically looks at your skeletonâwhich is made up of all the bones in your body.
What is a Bone Density Scan (DEXA)? Bone density scanning, also called dual-energy x-ray absorptiometry (DXA or DEXA) or bone densitometry, is an enhanced form of x-ray technology that is used to measure bone loss.DEXA is today's established standard for measuring bone mineral density (BMD).-rays are the oldest and most frequently used form of medical imaging. DEXA is most often performed on the lower spine and hips. Portable DEXA devices, including some that use ultrasound waves rather than x-rays, measure the wrist, fingers or heel and are sometimes used for screening purposes.