An ultrasound imaging system is equipped with a transducer, which operates at 10 MHz and has a diameter of 0.5 cm. The imaging system is tested in a medium having a speed of sound of 1560 m/s. The amplitude attenuation factor (a) of the medium is 0.04 cm-1MHz-1. It is aimed at imaging objects up to a range of 10 cm using the system. a) Compute the maximum loss in dB of the ultrasound waves received at the transducer. b) Using the simple model for the beam pattern, determine if the 10 cm depth is in the near field or far field for the transducer. c) What is the maximum pulse repetition rate for the system? d) What is the maximum frame rate if 128 A-lines are required for an image? e) What will happen to the B-mode image if the speed of sound in the medium is non- uniform, but we still use a uniform speed assumption?

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