Practice Echo Questions Flashcards
1
Q
What is the wavelength for a sound wave with a frequency of 1.6 MHz?
A
C (Speed of sound) = Wavelength * Frequency
C = ~1600 cm/sec
Answer = 1 mm or 0.001 meters
2
Q
What medium does an ultrasound wavae result in the fastest loss of it’s strength?
A
Lung
Why? –> High content of air and the abundaance of highly reflextive tissue/air interfaces (Sound waves dissipate in the lung so fast that the lungs are virtually opaque to ultrasound)
3
Q
Why do we use ultrasound gel?
A
Improve contact between transducer surface and the skin by eliminating any tissue/air interfaces, which are highly reflective and thus prevent transmission into the body
4
Q
A
