Unformatted text preview: interchanging bone and muscle. Ignore attenuation in this problem. 6) Repeat 4) for an ultrasound wave at 1 MHz exactly normal to the interface between the muscle and bone. 7) What is the wavelength of 10 MHz ultrasound in blood? 8) How thick should a PZT-4 ultrasound transducer operating at 10 MHz in the thickness mode be if the transducer is (a) operating in blood, (b) operating in muscle? 9) If a plane wave carrying 2 mW per square cm of ultrasound power at 1 MHz is introduced into liver tissue, calculate the power after it has traveled (a) 5 cm and (b) 10 cm in the liver. 10) Sketch the field pattern expected from a 1 cm diameter disc ultrasound transducer operating in water at 1 MHz. Label the Fresnel and Fraunhofer zones and indicate the position of the last axial maximum and give its distance from the transducer....
View Full Document
This note was uploaded on 01/12/2011 for the course BME 325 taught by Professor Sahak during the Fall '10 term at Northwestern.
- Fall '10
- Biomedical Engineering