Haigis W, Buschmann W
Ultrasound Med Biol. 1985 Jan-Feb;11(1):149-55. doi: 10.1016/0301-5629(85)90017-1.
The use of different echo standards in ophthalmic ultrasonography is discussed. The acoustical properties of the W38 Hema reflector made out of soft corneal contact lens material are determined and verified in several independent measurements. It is shown that this material meets the requirements for plane echo interfaces which are mandatory for reflectors considered to serve as echo standards. A conversion diagram is given for echo references presently used in ophthalmic ultrasonography. Finally, an example for an application of the W38 reflector in performance control and calibration measurements on ultrasonic instruments is presented.
讨论了眼科超声检查中不同回声标准的应用。由软性角膜接触镜材料制成的W38血液反射器的声学特性在几次独立测量中得到确定和验证。结果表明，这种材料符合平面回声界面的要求，而平面回声界面是用作回声标准的反射器所必需的。给出了目前眼科超声检查中使用的回声参考的转换图。最后，给出了W38反射器在超声仪器性能控制和校准测量中的一个应用实例。
