So, does this mean if I had DEXA on Hologic (-3.9), that I am taking Tymlos when I do not need it?
Ai said..... The slight difference between -3.9 and -3.3 is purely due to the fact that Lunar and Hologic use different reference groups and math formulas to calculate their scores—not because your bones are physically different.

I just asked Ai it said When we plug your actual BMD of 0.631 g/cm² into the cross-calibration formulas, here is how the numbers shift:Your Hologic Results: BMD of 0.631 g/cm² | T-score of -3.9Estimated GE Lunar Results (L4 Specific): BMD of 0.803 g/cm² | Estimated T-score of approx. -3.3Estimated GE Lunar Results (General Spine): BMD of 0.729 g/cm² | Estimated T-score of approx. -3.9Why You Still Have Osteoporosis. While an estimated Lunar T-score of -3.3 looks slightly "better" than a Hologic T-score of -3.9, it is crucial to look at where both numbers fall relative to the World Health Organization (WHO) diagnostic categories:Normal Bone Density: -1.0 or higher Osteopenia (Low Bone Mass): Between -1.0 and -2.5Osteoporosis: -2.5 or lower because both your actual Hologic T-score (-3.9) and your estimated Lunar T-score (-3.3 to -3.9) are significantly below the -2.5 threshold, your bone density is firmly in the osteoporosis range on both machines. The slight difference between -3.9 and -3.3 is purely due to the fact that Lunar and Hologic use different reference groups and math formulas to calculate their scores—not because your bones are physically different.