It is desired to have an ultrasound wavelength of 05 mm for

It is desired to have an ultrasound wavelength of 0.5 mm for imaging soft tissue in the body. What frequency should be used to achieve this value? if a short pulse of 10 wave length is being used, what is the best axial resolution that can be achieved?

Solution

THE FREQUENCY IS CALCULATED AS FOLLOWS:

f = c / lambda

= 3*10^8 / 0.5x10^-3

= 6.e+11 Hz

axial resolution: 1/2 [SPL] = (1/2)[wavelength*number of pulses]

= (1/2)[0.5x10^-3 * 10]

= 2.5e-3 m

= 2.5 mm