What is the function of the gel used in ultrasound procedures?

The gel used in ultrasound procedures plays a critical role in the transmission of sound waves from the transducer to the patient's body. Specifically, it serves to eliminate air between the transducer and the skin, which is essential for effective sound wave propagation. Air is a barrier to ultrasound waves, causing a significant loss of signal and unclear images. By applying gel, it creates a smooth interface that allows the ultrasound waves to travel more freely, thereby improving image quality and aiding in the accurate assessment of internal structures.

The other options do not accurately reflect the primary function of the gel in ultrasound. The gel does not provide warmth to the transducer, enhance the color of images, or stabilize the transducer's position directly. Instead, its main purpose is to ensure a clear path for sound wave transmission, which is fundamental to obtaining high-quality ultrasound images.