@article{oai:toyama.repo.nii.ac.jp:00003094,
 author = {石原, 外美 and 丁, 柏林 and 柴田, 博司 and 太田, 美紀 and 五嶋, 孝仁 and 高沢, 武志},
 issue = {718},
 journal = {日本機械学會論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A},
 month = {Jun},
 note = {application/pdf, This study was performed as a part of the research on the ultrasonic measurement in vivo of bone porosity, density, Young modulus and hardness. It was clarified that the bone porosity estimated by Biot's theory agrees well with the actual porosity within an accuracy of 5%. In the estimation the structure factor involved in the Biot's theory was determined as a value of 2. In this evaluation, an use of the propagation velocity of the fast wave is more advantageous to estimate the bone porosity than using the one of the slow wave. The estimated bone density by Biot's theory yields only ±5% differences from the measured value by the Archimedes method. Therefore, bone density can be estimated precisely by using the proposed ultrasonic wave method., Article, relation: isVersionOf: http://ci.nii.ac.jp/naid/110004741198/},
 pages = {957--963},
 title = {超音波法による骨密度及びヤング率測定法に関する研究 : 測定精度の検討},
 volume = {72},
 year = {2006}
}