The International Society for Clinical Densitometry (ISCD) convenes a Position Development Conference (PDC) every 2 yr to make recommendations for standards in the field of bone densitometry. The recommendations are based on clinically relevant issues in bone densitometry such as quality control, acquisition, analysis, interpretation and reporting. Topics for consideration are developed by the ISCD Board of Directors and its Scientific Advisory Committee. Clinically relevant questions related to each topic area are assigned to task forces for a comprehensive review of the medical literature and subsequent presentation of the reports to an international panel of experts. For this PDC, the Expert Panel included representatives of the American Society for Bone and Mineral Research, International Bone and Mineral Society and the National Osteoporosis Foundation. The recommendations of the PDC Expert Panel are then reviewed by the ISCD Board of Directors. Recommendations that are approved become Official Positions of the ISCD. The most recent PDC was held July 20-22, 2007, in Lansdowne, Virginia, USA. Topics considered included vertebral fracture assessment, technical and clinical issues relevant to dual-energy X-ray absorptiometry (DXA), and bone densitometry technologies other than central DXA. This report describes the methodology and the results of the Lansdowne, Virginia, USA 2007 PDC, and a summary of all ISCD Official Positions, including the ones recently adopted by this PDC and the 2007 Pediatric PDC held in Montreal, Quebec, Canada.