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Question 7 (AC 2.1 & 2.2) A patient has received this image shown on the right. An ultrasound pulse is generated by the probe. Draw a graph (intensity vs time) to show what happens to the intensity of the signal after it leaves the probe. Explain how the frequency of the ultrasound used affects the penetration of the wave and the quality of the resulting image produced. Briefly explain the phrase "echo-location". iv ) Using the image to help your explanation, discuss how an ultrasound machine uses the principles of echo- location to examine internal body structures. Type your answer here