In sonography, what is the purpose of harmonic imaging?

Harmonic imaging is an advanced ultrasound technique that significantly enhances image quality by minimizing artifacts. It exploits the nonlinear propagation of ultrasound waves, which generates harmonic frequencies as the waves travel through the tissues. By utilizing these harmonic frequencies, which are generated at twice the fundamental frequency, sonography can produce clearer images with improved contrast and resolution.

Artifacts, such as clutter and side lobes, can obscure important anatomical details and affect diagnostic accuracy. Harmonic imaging allows for these artifacts to be suppressed, resulting in more reliable imaging. The higher frequency harmonics tend to produce cleaner signals, making it easier to differentiate between various tissues and structures, ultimately leading to enhanced diagnostic capabilities.

Although aspects like producing 3D images, enhancing color differentiation, or speeding up scanning time may be desirable in sonography, they do not directly relate to the primary function of harmonic imaging. The fundamental purpose and benefit of this technique remain centered on improving overall image quality and reducing the impact of artifacts.