DMS 206 Test 2 Questions And
Answers
/. What is the wavelength of 3MHz ultrasound in soft tissue - Answer-0.513 mm
/.What are the two properties that establish sounds propagation speed in a given
medium - Answer-Density and stiffness
/.How far away is an interface in tissue if the elapsed time for the sound wave to travel
out and back is 320 us? - Answer-24.64 cm
/.You are imaging a kidney with a 2.5 MHz transducer. You change to a 5.0 MHz
transducer. what will happen to the wavelength? - Answer-The wavelength will
decrease.
/.Wavelength is a measure of - Answer-distance
/.The wavelength in a medium having a wave velocity of 1500 m/s employing a
transducer frequency of 5 MHz is - Answer-0.3 mm
/.What is the velocity of ultrasound in a medium if the wavelength is 2mm and the
frequency is 5 MHz? - Answer-1,000,000 cm/s
/.A decrease in amplitude by a factor 10 is equal to - Answer--20 db
/.To gain deeper penetration, the sonographer will select a lower frequency transducer -
Answer-True
/.A wave vibrating at 20 cycles per second has a frequency of - Answer-20 Hz
/.The conversion of an incident pressure wave to an electrical wave signal is the effect -
Answer-Piezoelectric
/.The wavelength is directly proportional to the frequency - Answer-false
/.Which of the following units are appropriate to describe the period of an acoustic wave
- Answer-microseconds
/.The wavelength of a 5 MHz wave is greater than the wavelength of a 5 kHz wave -
Answer-false
/.The length of one complete cycle is called: - Answer-Period
Answers
/. What is the wavelength of 3MHz ultrasound in soft tissue - Answer-0.513 mm
/.What are the two properties that establish sounds propagation speed in a given
medium - Answer-Density and stiffness
/.How far away is an interface in tissue if the elapsed time for the sound wave to travel
out and back is 320 us? - Answer-24.64 cm
/.You are imaging a kidney with a 2.5 MHz transducer. You change to a 5.0 MHz
transducer. what will happen to the wavelength? - Answer-The wavelength will
decrease.
/.Wavelength is a measure of - Answer-distance
/.The wavelength in a medium having a wave velocity of 1500 m/s employing a
transducer frequency of 5 MHz is - Answer-0.3 mm
/.What is the velocity of ultrasound in a medium if the wavelength is 2mm and the
frequency is 5 MHz? - Answer-1,000,000 cm/s
/.A decrease in amplitude by a factor 10 is equal to - Answer--20 db
/.To gain deeper penetration, the sonographer will select a lower frequency transducer -
Answer-True
/.A wave vibrating at 20 cycles per second has a frequency of - Answer-20 Hz
/.The conversion of an incident pressure wave to an electrical wave signal is the effect -
Answer-Piezoelectric
/.The wavelength is directly proportional to the frequency - Answer-false
/.Which of the following units are appropriate to describe the period of an acoustic wave
- Answer-microseconds
/.The wavelength of a 5 MHz wave is greater than the wavelength of a 5 kHz wave -
Answer-false
/.The length of one complete cycle is called: - Answer-Period
