| 摘要 |
<p>Acoustic imaging systems are provided. A representative acoustic imaging system includes a transducer (402) that incorporates a backing and an acoustic element (412) extending from the backing. The acoustic element includes a piezoelectric element (404) and a de-matching layer (410). The de-matching layer is arranged between the backing and the piezoelectric element and exhibits an acoustic impedance greater than that of the piezoelectric element. The piezoelectric element exhibits a thickness that is less than one-half of a wavelength to be generated by the piezoelectric element. Methods also are provided.</p> |
