DMS Ultrasound Physics Exam 1

DMS Ultrasound Physics Exam 1
In soft tissue, sound travels at approximately - -1.54 mm/microsecond

- A linear format will produce what image shape on the display? - -
Rectangular

- ______ is the time from the start of a pulse to the start of the next pulse - -
Pulse Repetition Period (PRP)

- If frequency increases, what happens to wavelength? - -It decreases

- True or False, ultrasound waves can be polarized? - -True

- The number of pulses occurring in one second is ____? - -Pulse Repetition
Frequency (PRF)

- What are the acoustic variables? - -Pressure, Density, Temperature and
Particle Motion

- Increasing the frequency of an ultrasonic longitudinal wave will result in
____ in the velocity of that wave. - -No Change

- When frequency increases, what happens to (SPL) Spatial Pulse Length? - -
It decreases

- Sound can be described as a ____, _____ wave. - -Mechanical, Longitudinal

- What is the mathematical equation for wavelength? - -Propagation speed /
frequency
Wavelength = c / f

- The pulse repetition frequency is _____ to pulse repetition period. - -
Inversely

- True or False, the higher the frequency, the greater the penetration? - -
False

- Specular Reflections - -Occur when the interface is larger than the
wavelength

- In which of the tissues does sound travel the slowest? - -Lung

- The unit used in relation to frequency is - -Hertz (Hz)