Fig. 3.
Universal probe acoustic verification measurements. The UoC probe is shown configured to operate in modes that have traditionally required three types of probes. The columns have focused beam measurements (temporal, spectral, axial, and lateral) from a water tank using three builds of the UoC probe, where the rows cover the three major categories of probe configurations. (A) A linear probe configuration suited for shallow imaging applications with higher frequency content and higher resolution, such as used for carotid artery imaging, where Sr is ∼200 μm. (B) A curvilinear probe configuration suited for middepth imaging applications where low-frequency pulses and a deep focus allow for applications such as abdominal imaging, where Sr is ∼550 μm. (C) A sector (or phased array) probe configuration suited for deep high-pressure imaging applications and harmonic generation for higher resolution, as used for cardiac harmonic imaging, where Sr is ∼650 μm.