Table 1.

Design specifications for the US-TSI probe

Imaging Transducer		Heating Transducer
Configuration	1D Linear Array	Configuration	Dual 1D Concave Arrays
Elements number	192	Elements number	2 x 16
Element pitch (X-direction*)	0.2 mm	Element pitch (Y-direction*)	1.03 mm
Element kerf (X-direction*)	0.05 mm	Element kerf (Y-direction*)	0.25 mm
Element height (Y-direction*)	4 mm	Element height (X-direction*)	39.75 mm
Center frequency	10 MHz	Center frequency	3.5 MHz
Focal depth	25 mm	Focal depth	60 mm (XZ plane) & 40 mm (YZ plane)
Material	PZT-5H	Material	PZT-5A

^*: The lateral and elevation directions of the imaging array correspond to the X- and Y-directions, while for the heating array, the lateral and elevation directions are reversed, corresponding to the Y- and X-directions (Figure 1B).