摘要
基于超声背散射信号,本文提出用自回归(AR)倒谱法来估计松质骨中骨小梁的间距。对牛胫骨和人离体跟骨松质骨中的超声背散射信号采用AR倒谱法进行了分析,并估计了牛胫骨和人离体跟骨中骨小梁的平均间距。结果表明,松质骨的密度与骨小梁的平均间距具有密切的关系,随松质骨表观密度的减小,骨小梁的平均间距增大,用AR倒谱能比较准确地估计出松质骨中骨小梁的平均间距。
The Autoregression （AR） cepstrum is put forward to estimate the mean spacing of trabecular bones in cancellous bone based on ultrasonic backscatter signal. The ultrasonic backscatter signals from bovine tibiae and human calcaneus cancellous bone in vitro were investigated by performing Autoregression （AR） cepstrum, and the mean spacing of trabecular bones in cancellous bone was estimated. The results show that the mean spacing of trabecular bones and the apparent density of cancellous bone have a close relationship. The mean spacing of trabecular bones increases with the reduction of the apparent density. The AR cepstrum can be used to estimate accurately the mean spacing of trabecular bones in cancellous bone.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2007年第1期17-22,共6页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(10304003)
教育部博士点基金(20040246017)
上海市自然科学基金(062R140111)资助项目
关键词
骨小梁
平均间距
超声
AR倒谱
trabecular bone
mean spacing
ultrasound
AR cepstrum
