Genant—GE/Lunar, Hologic—Consultancies; John A. Shepherd—GE/Lunar, Hologic—Consultancies; Thomas Fuerst as “employee and shareholder in Synarc Inc”. Open Access This article CB-839 order is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. References 1. Genant HK, Grampp S, Gluer CC, Faulkner KG, Jergas M, Engelke K, Hagiwara S, Van Kuijk C (1994) Universal standardization for dual x-ray absorptiometry: patient and phantom cross-calibration results. J Bone Miner Res 9:1503–1514CrossRefPubMed 2. International Committee for

Standards in Bone Measurement (1997) Standardization of proximal femur bone mineral density (BMD) measurements by DXA. Bone 21:369–370CrossRef 3. Hui SL, Gao S, Zhou XH, Johnston CC Jr, Lu Y, Gluer CC, Grampp S, Genant H (1997) Universal standardization of bone density measurements: a method with optimal properties

for calibration among several instruments. J Bone Miner Res 12:1463–1470CrossRefPubMed 4. Lu Y, Fuerst T, Hui S, Genant HK (2001) Standardization of bone mineral density at femoral neck, trochanter and Ward’s triangle. Osteoporos Int 12:438–444CrossRefPubMed 5. Boudousq V, Goulart DM, Dinten JM, de Kerleau CC, Thomas E, Mares O, Kotzki PO (2005) Image resolution and magnification using a cone beam densitometer: optimizing data acquisition for hip morphometric analysis. Osteoporos Int 16:813–822CrossRefPubMed 6. Fan B, Lewiecki EM, Sherman M, Lu Y, Miller PD, Genant HK, Shepherd JA (2008) Improved click here precision with Hologic Apex software. Osteoporos Int 19:1597–1602CrossRefPubMed 7. Bland JM, Altman DG (1999) Measuring agreement in method comparison studies. Stat Methods Med Res 8:135–160CrossRefPubMed 8. Genant HK (1995) Universal standardization for dual X-ray absorptiometry: patient and phantom cross-calibration results. J Bone Miner

Res 10:997–998CrossRefPubMed 9. Shepherd JA, Fan B, Lu Y, Lewiecki EM, Miller P, Genant HK (2006) Comparison of BMD precision for Prodigy and Delphi spine and femur scans. Osteoporos Int 17:1303–1308CrossRefPubMed ifenprodil 10. Pearson D, Horton B, Green DJ (2006) Cross calibration of DXA as part of an equipment replacement program. J Clin Densitom 9:287–BTK inhibitor 294CrossRefPubMed 11. Ozdemir A, Ucar M (2007) Standardization of spine and hip BMD measurements in different DXA devices. Eur J Radiol 62:423–426CrossRefPubMed 12. Henzell S, Dhaliwal SS, Price RI, Gill F, Ventouras C, Green C, Da Fonseca F, Holzherr M, Prince R (2003) Comparison of pencil-beam and fan-beam DXA systems. J Clin Densitom 6:205–210CrossRefPubMed 13. Ellis KJ, Shypailo RJ (1998) Bone mineral and body composition measurements: cross-calibration of pencil-beam and fan-beam dual-energy X-ray absorptiometers. J Bone Miner Res 13:1613–1618CrossRefPubMed 14. Blake GM, Harrison EJ, Adams JE (2004) Dual X-ray absorptiometry: cross-calibration of a new fan-beam system.