Lunt M J
Phys Med Biol. 1980 Sep;25(5):839-48. doi: 10.1088/0031-9155/25/5/002.
A simple model is used to indicate the optimum ultrasonic frequency and angle of insonation for Doppler studies on vessels at different depths in the body. The criterion taken in determining this optimum frequency is the minimum error in a mean or root mean square frequency meter. The analysis shows that theoretically there is an optimum angle and frequency that depends on the depth of the vessel being examined, and that the optimum frequency is much lower than that normally used.
一个简单的模型被用来指出在对身体不同深度的血管进行多普勒研究时的最佳超声频率和入射角度。在确定这个最佳频率时所采用的标准是平均或均方根频率计中的最小误差。分析表明，理论上存在一个取决于被检查血管深度的最佳角度和频率，并且最佳频率比通常使用的频率要低得多。
