. Calculate the diameter of a baby's head if there is a time delay of 85 microseconds between receiving pulses from either side of the skull, and the speed of ultrasound can be assumed to be 1250 m/s.

College Physics
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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Do 3 and 4

1. Explain the principle of ultrasound scanning and how it can be
used to produce 2D images of tissues e.g. baby's tissue in a
mother's womb.
2. Calculate the fraction of reflected ultrasound energy when
ultrasound waves cross from soft tissue into fat if the acoustic
impedance for soft tissue is 1.60 x 106 kg m2 s¹ and for fat has
the value 1.40 x 106 kg m-² s-1.
3. Calculate the diameter of a baby's head if there is a time delay of
85 microseconds between receiving pulses from either side of the
skull, and the speed of ultrasound can be assumed to be 1250
m/s.
4. Use the example above to discuss the applications, benefits and
limitations of ultra-sonography techniques. You will need to
consider issues such as cost, safety and image quality.
Transcribed Image Text:1. Explain the principle of ultrasound scanning and how it can be used to produce 2D images of tissues e.g. baby's tissue in a mother's womb. 2. Calculate the fraction of reflected ultrasound energy when ultrasound waves cross from soft tissue into fat if the acoustic impedance for soft tissue is 1.60 x 106 kg m2 s¹ and for fat has the value 1.40 x 106 kg m-² s-1. 3. Calculate the diameter of a baby's head if there is a time delay of 85 microseconds between receiving pulses from either side of the skull, and the speed of ultrasound can be assumed to be 1250 m/s. 4. Use the example above to discuss the applications, benefits and limitations of ultra-sonography techniques. You will need to consider issues such as cost, safety and image quality.
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