In addition to analysis of the degree of vascular sclerosis, the mineral content of the bone will also be analyzed in a subpopulation with quantitative backscattered electron imaging (qBEI) related to the degree of vascular sclerosis and bone mineral density. The ultimate goal of the analysis is the discrimination of the most sensitive predictive marker(s) for diagnosis and outcome of patients with CAD for the purpose of early diagnosis and primary prevention of the disease.