Consider the phased array in Figure 11.15. Suppose we want to image a cross section...

Consider the phased array in Figure 11.15. Suppose we want to image a cross section of a patient as shown in Figure P11.2 by acquiring a scan line every . Assume there are 101 transducers operating at a frequency of 2 MHz and c = 1, 540 m/s and d = 0.6 mm.

(a) Find an expression for the time delay of the ith transducer as a function of angle of the transmitted plane wave.

(b) How long does it take to scan the entire FOV assuming R = 20 cm?