Mandarano-Filho Luiz Garcia, Bezuti Márcio Takey, Mazzer Nilton, Barbieri Cláudio Henrique
Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo, Ribeirão Preto - SP, Brazil.
Acta Ortop Bras. 2012;20(3):184-90. doi: 10.1590/S1413-78522012000300010.
An experimental in vitro study was carried out to evaluate the influence of cortical bone thickness on ultrasound propagation velocity.
Sixty bone plates were used, made from bovine femurs, with thickness ranging from 1 to 6 mm (10 of each). The ultrasound velocity measurements were performed using a device specially designed for this purpose, in an underwater acoustic tank and with direct contact using contact gel. The transducers were positioned in two ways: on opposite sides, with the bone between them, for the transverse measurement; and parallel to each other, on the same side of the bone plates, for the axial measurements.
In the axial transmission mode, the ultrasound velocity speed increased with cortical bone thickness, regardless of the distance between the transducers, up to a thickness of 5 mm, then remained constant thereafter. There were no changes in velocity when the transverse measures were made.
Ultrasound velocity increased with cortical bone thickness in the axial transmission mode, until the thickness surpasses the wavelength, after which point it remained constant.
Experimental Study.
开展一项体外实验研究，以评估皮质骨厚度对超声传播速度的影响。
使用60块由牛股骨制成的骨板，厚度范围为1至6毫米（每种厚度各10块）。超声速度测量是在水下声学水箱中，使用为此专门设计的设备，并通过接触凝胶进行直接接触来进行的。换能器有两种放置方式：相对放置，骨板置于两者之间，用于横向测量；彼此平行，置于骨板同一侧，用于轴向测量。
在轴向传播模式下，超声速度随皮质骨厚度增加而增加，无论换能器之间的距离如何，直至厚度达到5毫米，此后保持恒定。进行横向测量时，速度没有变化。
在轴向传播模式下，超声速度随皮质骨厚度增加而增加，直至厚度超过波长，此后保持恒定。
实验研究。
