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    Bone densitometry using x-ray imaging systems
    2.
    发明授权
    Bone densitometry using x-ray imaging systems 失效
    使用x射线成像系统的骨密度测定

    公开(公告)号：US5949846A

    公开(公告)日：1999-09-07

    申请号：US794615

    申请日：1997-02-03

    申请人： Jay A. Stein ,  Howard P. Weiss ,  Vincent E. Quinn ,  Richard E. Cabral ,  John A. Shepherd ,  Kevin E. Wilson

    发明人： Jay A. Stein ,  Howard P. Weiss ,  Vincent E. Quinn ,  Richard E. Cabral ,  John A. Shepherd ,  Kevin E. Wilson

    IPC分类号： A61B6/00 ,  G01N23/00

    CPC分类号： A61B6/505

    摘要： A method of measuring bone mineral density (BMD) of a selected region of bone in a small body portion (such as a limb or extremity), using a mini C-arm x-ray fluoroscopic imaging system to acquire the data from which the BMD is calculated. Apparatus for performing the method includes a tray for positioning the small body portion in the x-ray beam path of the imaging system and a sample of bone of predetermined density supported by the tray in side-by-side relation to the selected region of bone.

    摘要翻译： 使用小型C型臂X射线透视成像系统来测量小体部（例如肢体或肢体）中骨骼的选定区域的骨矿物质密度（BMD）的方法，以获取BMD 被计算。 用于执行该方法的装置包括用于将小体部分定位在成像系统的x射线束路径中的托盘和由托盘支撑的预定密度的骨样品与所选择的骨区域并排关系 。

    Equipment and method for calibration and quality assurance of an ultrasonic bone anaylsis apparatus
    5.
    发明授权
    Equipment and method for calibration and quality assurance of an ultrasonic bone anaylsis apparatus 失效
    超声波骨头分析装置的校准和质量保证的设备和方法

    公开(公告)号：US5755228A

    公开(公告)日：1998-05-26

    申请号：US534131

    申请日：1995-09-26

    申请人： Kevin E. Wilson ,  Donald Barry ,  Dennis G. Lamser ,  John P. O'Brien ,  Jay A. Stein

    发明人： Kevin E. Wilson ,  Donald Barry ,  Dennis G. Lamser ,  John P. O'Brien ,  Jay A. Stein

    IPC分类号： A61B8/00 ,  A61B5/107 ,  A61B8/08

    CPC分类号： A61B5/1074 ,  A61B8/0875 ,  A61B8/587

    摘要： An improvement to calibration and quality assurance of an ultrasonic bone analysis apparatus is achieved by using phantoms. A received ultrasound signal that passed through a first phantom is used as a baseline for calculating BUA. The first phantom has an attenuation-versus-frequency profile that is substantially flat in a frequency range of 200 to 1000 kHz and a sound impedance that approximates that of soft human tissue. A propagation time of the signal is used to calibrate a zero point of the apparatus. A second phantom has an attenuation in a frequency range of 200-1000 kHz which approximates that of a human foot, including an attenuation-versus-frequency profile that is substantially linear in the frequency range of 200-600 kHz and is approximately 1 dB/MHz per mm. A received ultrasound signal that passed through the second phantom is used to calibrate the apparatus for a BUA calculation, and can also be used for at least one of determining and correcting a drift of the apparatus. A third phantom has a predetermined SOS that is substantially independent of temperature. A received ultrasound signal that passed through the third phantom is used to calibrate the apparatus for a SOS calculation, and can also be used for at least one of determining and correcting instrument drift. An ultrasonic signal is transmitted through mutually touching transducer pads. The received signal is used as a baseline for calculating BUA. A measurement of the propagation time of the received signal is compared with a temporally-proximate measurement of an ultrasonic signal that passed through a patient's heel to determine a time of propagation through the heel.

    摘要翻译： 通过使用幻影实现对超声骨分析装置的校准和质量保证的改进。 将通过第一个体模的接收超声信号用作计算BUA的基线。 第一模型具有在200至1000kHz的频率范围内基本平坦的衰减对频率分布，以及接近于软的人体组织的声阻抗。 信号的传播时间用于校准装置的零点。 第二体模在200-1000kHz的频率范围内具有衰减，其近似于人脚的衰减，包括在200-600kHz的频率范围内基本上线性的衰减对频率分布，并且大约为1dB / MHz / mm。 使用通过第二体模的接收的超声信号来校准用于BUA计算的装置，并且还可以用于确定和校正装置的漂移中的至少一个。 第三体模具有基本上与温度无关的预定SOS。 使用通过第三体模的接收超声信号来校准用于SOS计算的装置，并且还可以用于确定和校正仪器漂移中的至少一个。 超声波信号通过相互接触的传感器垫片传输。 接收到的信号用作计算BUA的基线。 将接收信号的传播时间的测量与通过患者脚跟的超声信号的时间上接近的测量进行比较，以确定通过脚后跟传播的时间。

    Equipment and method for calibration and quality assurance of an ultrasonic bone analysis apparatus
    8.
    发明授权
    Equipment and method for calibration and quality assurance of an ultrasonic bone analysis apparatus 失效
    超声骨分析仪器的校准和质量保证的设备和方法

    公开(公告)号：US5935073A

    公开(公告)日：1999-08-10

    申请号：US866804

    申请日：1997-05-30

    申请人： Kevin E. Wilson ,  Donald Barry ,  Dennis G. Lamser ,  John P. O'Brien ,  Jay A. Stein

    发明人： Kevin E. Wilson ,  Donald Barry ,  Dennis G. Lamser ,  John P. O'Brien ,  Jay A. Stein

    IPC分类号： A61B8/00 ,  A61B5/107 ,  A61B8/08

    CPC分类号： A61B5/1074 ,  A61B8/0875 ,  A61B8/587

    摘要： A method of calibrating an ultrasound bone analysis apparatus having a pair of transducer assemblies. Each transducer assembly has a transducer and a coupling pad, and is movable relative to the other so that a face of each pad can be moved to a position in which they mutually contact and to a position where the faces contact body parts. The method according to the present application includes transmitting an ultrasound signal from one transducer and receiving a signal corresponding to the transmitted ultrasound signal through the other transducer when the transducer assemblies are in the first position and the second position. A time for the ultrasound signal to pass through the body part is determined, and a width of the body part based on positions of the transducers is determined. Then, using the time and width values a speed of sound of the ultrasound signal passing through the body part with squish compensation is calculated.

    摘要翻译： 一种校准具有一对换能器组件的超声骨分析装置的方法。 每个换能器组件具有换能器和耦合垫，并且可相对于另一个移动，使得每个垫的表面可以移动到它们相互接触的位置和面接触身体部分的位置。 根据本申请的方法包括当换能器组件处于第一位置和第二位置时，从一个换能器发送超声信号并且通过另一个换能器接收与所发射的超声信号相对应的信号。 确定超声信号通过身体部位的时间，并且确定基于换能器的位置的身体部位的宽度。 然后，使用时间和宽度值计算通过身体部位的超声信号的声音的压缩补偿。

    Ultrasonic bone testing apparatus with repeatable positioning and repeatable coupling
    10.
    发明授权
    Ultrasonic bone testing apparatus with repeatable positioning and repeatable coupling 失效
    超声波骨测试仪具有重复定位和可重复耦合

    公开(公告)号：US6004272A

    公开(公告)日：1999-12-21

    申请号：US477580

    申请日：1995-06-07

    申请人： Donald Barry ,  Richard E. Cabral ,  Daniel W. Hawkins ,  Dennis G. Lamser ,  John P. O'Brien ,  Jay A. Stein ,  Kevin E. Wilson

    发明人： Donald Barry ,  Richard E. Cabral ,  Daniel W. Hawkins ,  Dennis G. Lamser ,  John P. O'Brien ,  Jay A. Stein ,  Kevin E. Wilson

    IPC分类号： A61B8/00 ,  A61B5/107 ,  A61B8/08

    CPC分类号： A61B5/1074 ,  A61B8/0875

    摘要： An ultrasonic bone testing apparatus has a foot well assembly and a shin guide assembly which are mechanically coupled to secure a foot and lower leg of patient. The shin guide assembly includes a molded form lined with contoured foam lining. An instep support guide having sliding blocks is mounted on the molded form. The sliding blocks attach the shin guide assembly to the foot well assembly. The apparatus further includes a transducer drive mechanism for positioning a pair of transducer assemblies. A controller automatically modifies the positioning of the transducer assemblies until ultrasonic coupling is achieved and a receiving transducer receives a signal of a predetermined quality. The distance between the transducers is continuously measured by a position encoder. The controller uses temperature readings from a temperature sensor to improve the accuracy of the position encoder measurements and correct for temperature dependent inaccuracy in the ultrasound measurement. A coupling pad and acoustical delay line of the transducer assembly provide a waveguide function to collimate an acoustical beam. The elastomer coupling pad has an angled surface which expels air bubbles from a contact area when pressure is applied to the pad.

    摘要翻译： 一种超声波骨测试装置具有脚部组件和一个机械联接以固定患者的脚和小腿的引导组件。 胫骨导向组件包括一个内衬有轮廓的泡沫衬里的模制形式。 具有滑块的脚背支撑引导件安装在模制形式上。 滑动块将引导组件附接到脚部组件。 该装置还包括用于定位一对换能器组件的换能器驱动机构。 控制器自动修改换能器组件的定位，直到实现超声波耦合并且接收换能器接收到预定质量的信号。 换能器之间的距离由位置编码器连续测量。 控制器使用温度传感器的温度读数来提高位置编码器测量的精度，并校正超声测量中与温度有关的不准确度。 换能器组件的耦合垫和声学延迟线提供用于准直声波束的波导功能。 弹性体联接垫具有成角度的表面，当压力施加到垫时，其从接触区域排出气泡。