How wide are the elements of a linear phased-array transducer?

In a linear phased-array transducer, the elements are typically designed to be one quarter wavelength wide. This dimension is crucial for achieving good spatial resolution and minimizing side lobes. When the elements are structured this way, they can effectively provide the necessary directive sensitivity and focus for ultrasound beams.

By being one quarter wavelength wide, the elements allow for the proper wave interference patterns that enable steering and focusing of the ultrasound beam. This ensures that the transducer can deliver high-quality images through the careful manipulation of the phase and timing of each element’s emitted sound waves. The design also mitigates issues with grating lobes, enabling a clearer and more distinct imaging of the target anatomy.

In contrast, elements that are wider than one quarter wavelength could lead to increased side lobes and decreased image quality. Therefore, utilizing this specific dimension is a key aspect of transducer design for optimal imaging performance in sonography.