Advantages of probing the trabecular bone with Golay coded ultrasonic excitation

The use of coded signals in medical ultrasound allows both frequency and penetration depth to be increased while retaining image resolution and avoiding the need to augment the transmitted peak pressure amplitude. Such approach minimizes the potential for bioeffects even if the average transmitted energy is increased. The goal of this work was to examine noise immunity and the bandwidth requirements of Golay coded waves used to determine frequency dependent attenuation of highly absorbing and scattering biological tissues such as bones.