POS1142 A CONCORDANCE STUDY OF CT DENSITOMETRY WITH DXA DENSITOMETRY

Background Osteoporosis is a skeletal disorder characterised by compromised bone strength resulting in an increased risk of fracture. Although DXA the only technology that can be used for diagnostic classification osteoporosis according to WHO, computed tomography imaging (CT) densitometry spine has equal or superior ability predict vertebral fractures postmenopausal women. Therefore continued use as primary modality calculating BMD may lead inaccurate exclusion and prognostication. Objectives To assess concordance spinal CT with current standard assessment through DXA-derived densitometry. Methods 50 patients who had both scan lumbar spine/thorax/abdomen performed within 18 months each other were included. The images analysed attain mean Hounsfield score vertebrae this was compared derived T-scores. A 131 threshold diagnosing akin T -2.5. final data find correlation values T-score using Pearson coefficient. Results 108.4 (osteoporotic) -1.22 (osteopenic) statistically significant coefficient 0.447, (p<0.01). Using ≤ -2.5, 15 (30%) included on our study would have diagnosis whereas 36 (72%) if <131. Out included, fragility fractures. these -1.2 (indicating osteopenia) 108 osteoporosis). Conclusion Our showed moderate positive between T-scores scores. This further validates previous studies suggest scans identify osteoporosis. 93% identified having 40% via DXA. These findings highlight limitations DXA, particularly terms overestimation mineral density related degenerative changes. thorax, abdomen already been indications opportunistically screen without additional radiation exposure, waiting time cost. allow more accurate subsequent treatment fracture reduction. References [1]Bartl, R. Bartl, C., 2019. manual; Prevention, Diagnosis Management . Germany: Springer International Publishing. [2]Engelke K, Adams JE, Armbrecht G, Augat P, Bogado CE, Bouxsein ML, et al. Clinical quantitative peripheral management adults: 2007 ISCD Official Positions. J Clin Densitom. 2008 Jan-Mar;11(1):123–62. [3]Bolotin HH. vivo methodology: erroneous misleading research clinical gauge status, fragility, remodelling. Bone. Jul;41(1):138–54 Disclosure Interests None declared