|DEXA||Dual-Energy X-Ray Absorptiometry - Bone Density||6 times|
|pQCT||Peripheral Quantitative Computed Tomography - Bone Mineral Content||3 times|
|CLICK HERE FOR SOME FUN FACTS ABOUT BONES|
DXA) measures bone density
and can also do full body composition scans. In our program, we
travel to the DEXA machine at the following times:
We have scans on the spine, hip, leg, heel and wrist... where X-Ray beams are used to measure bone mass. The ARadiology website has an excellent page about DEXA, how it works, what it looks for, and an example of a result.
The pQCT is another type of X-Ray scan, where the mineral density of the bones is measured, using the lower leg.
Yep, we have to stick a limb in there, but the clamps are quite gentle... you're just "stuck" for awhile. This machine, unlike the DEXA which rolls back and forth in a linear fashion, takes many sweeps around the leg to gather cross-sections for a "Volumetric Model." There is a more in-depth explanation of how the pQCT works at the StraTec medical website.
We are informed prior to each procedure that we will be exposed to radiation, and all female subjects have pregnancy tests prior to any scanning.
Total radiation over the duration is about 20.34
mRem for males and about 44.54 mRem for females. (However, for
comparison, total radiation for living in the city of Houston for one year is