Wide band pulse compression imaging with transmission compensation for frequency dependent attenuation

Ultrasound imaging of a deep part in a living body with a high resolution and a high SNR is strongly required. A pulse compression technique is efficient for a SNR, and wide-band imaging is important for an image resolution. Hence, a wideband transducer is studied vigorously. However, high-frequency components in a wide-band transmission tend to be affected by frequency dependent attenuation (FDA). This lowers not only a SNR but also an image resolution, since the distortion of echo signals makes an exact pulse compression impossible, i.e. the pulse width of the compressed echo signal becomes broad. In this study, we examine a compensation for FDA in the pulse compression imaging with FM chirp signals.