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Chapter 2: Q77PP (page 543)

If the deepest structure you wish to image is 10.0cm from the transducer, what is the maximum number of pulses per second that can be emitted? (a) 3850; (b) 7700; (c) 15400; (d) 1,000,000 .

Short Answer

Expert verified

The correct answer is (b)7700 s−1 .

Step by step solution

01

Given data

Distance of object from transducer is 10cm.

02

The Frequency

The number of pulses generated every second, is called frequency. Which is given as f=1t

Here, t is the time period of a pulse.

03

Number Of Pulses Per Second

The pulses travel distance 10cm then back to the transducer due to the reflection, so the total distance is d=20cm. We are given the velocity through the tissue by v=1540m/s.

f=1t=vd

Plug the values for v and d to get f-

f=1520 m/s0.20 m=7700 s−1

Therefore, the maximum number of pulses is 7700 s−1.

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