This preview shows page 1. Sign up to view the full content.
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
- Fall '10
- Biomedical Engineering