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C - Answer- What is dynamic aperture? A.aperture that varies with transmit frequency B.aperture that decreases as a function of time C.aperture that increases with increasing focal length D.aperture that changes as a function of frame rate A - Answer- to which acoustic variable is penetration...

What is the vertical axis of the graph called? - Answer- Y-axis What is the name of the horizontal axis of a graph? - Answer- X-axis What is the reciprocal of 1,000? - Answer- 0.001 What is the metric system order from highest to lowest? - Answer- Giga,mega,kilo,hector,deca,deci,centi,milli...

Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution - Answer- d. Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing - Answer- d. Damp...

Sound waves are: - Answer- longitudinal, mechanical The speed of sound in soft tissue is closest to: - Answer- 1,500 m/s The frequency closest to the lower limit of ultrasound is: - Answer- 15,000 Hz Which is not an acoustic variable? - Answer- intensity The effects of soft tissue on ult...

In soft tissue, if the frequency of a wave is increased the Propagation Speed (PS) will... - Answer- Remain the Same because stiffness and density affect Propagation Speed. What is the audible range? - Answer- 20-20,000Hz >20,000Hz=Ultrasound Frequency is measured in - Answer- Hertz (Hz)...

Which artifact is illustrated by this image? - Answer- a) Shadowing b) Side Lobe c) Reverberation d) Mirroring What is increased if the pulse duration is decreased? - Answer- a) Bandwidth b) Line Density c) Frame Rate d) Duty Factor What is the most appropriate action for the sonographe...

Which parameter is most likely to affect spatial resolution?A.dynamic range B.beam width C.system sensitivity D.depth of visualization - Answer- D.depth of visualization When using a 5MHZ transducer, in which tissue is the ultrasound wavelength shortest? A.fat B.blood C.bone D.muscle - Ans...

A sound wave is - Answer- mechanical, longitudinal A compression area of a sound wave is - Answer- high pressure, high density A rarefaction area of a sound wave is - Answer- low pressure, low density Which is considered an acoustic variable - Answer- pressure Which is a unit for pressur...

Terms used to describe the strength the sound beam include: - Answer- Amplitude and intensity The mass you are imaging has a diameter of 35, mm. This value can also t expressed as: - Answer- 3.5 cm Relative measurement of intensity based on a logarithmic scale expressed in: - Answer- Decibels ...

1000 BCE - Answer- After a period of instability caused by the conflict between Saul and David and the steady decline of Saul's ability to rule effectively, the Philistines defeated Saul and killed the king and most of his sons. David was quickly made king in the power vacuum that was left by Saul...