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1. 发明授权

US06322507B1 Ultrasonic apparatus and method for evaluation of bone tissue 失效
标题翻译：超声波仪器及评估骨组织的方法
公开(公告)号：US06322507B1
公开(公告)日：2001-11-27
申请号：US09445411
申请日：1999-12-08
申请人： Garri Passi , Shmuel Buksphan , Arcady Golden , Uriel Halavee , Gadi Keren , Vladimir Moshkovich
发明人： Garri Passi , Shmuel Buksphan , Arcady Golden , Uriel Halavee , Gadi Keren , Vladimir Moshkovich
IPC分类号： A61B800
CPC分类号： A61B8/0875
摘要： A method and system for ultrasonic imaging of bone tissue. A wide band scanning crystal transmits an ultrasonic signal of high frequency and multiple full waves into the bone tissue, and a second wide band scanning crystal receives the transmitted signal. The transmission frequency is progressively decreased until the number of full waves in the received signal equals that of the transmitted signal. At that frequency, the upper frequency limit, the number of full waves in the transmitted signal is gradually increased until the received signal contains at least two consecutive full waves of equal amplitude. The resultant transmission signal is then used to measure signal attenuation and velocity in bone tissue, in terms of standard bone imaging techniques. A lower frequency limit, below which the received signal undergoes distortion, is defined, and ultrasonic velocity depicted as a function of transmission frequency. Received ultrasonic wave frequency spectra, and the difference between the upper and lower frequency limits, are all used to image the bone tissue. Probe orientation is enhanced by a mechanism whereby a third wide band screening crystal receives the transmitted signal concomitantly with the second screening crystal. The signals received by the two wide band scanning crystals are correlated with each other to give a numerical indicator of the adequacy of probe orientation.
摘要翻译：骨组织超声成像的方法和系统。宽带扫描晶体将高频超声波信号和多个全波发射到骨组织中，第二宽带扫描晶体接收发射信号。传输频率逐渐降低，直到接收信号中的全波数等于发射信号的数量。在该频率下，频率上限，发送信号中的全波数量逐渐增加，直到接收信号包含至少两个相等振幅的连续全波。然后根据标准骨成像技术，将所得传输信号用于测量骨组织中的信号衰减和速度。定义了低频接收信号经历失真的频率下限，超声波速度被描述为传输频率的函数。接收到的超声波频谱，以及上下限频率之间的差异，都用于对骨组织进行成像。通过第三宽带屏蔽晶体与第二屏蔽晶体同时接收发射信号的机制来增强探针取向。由两个宽带扫描晶体接收的信号彼此相关，以给出探针取向充分性的数值指示。

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