give the correct order of receiver operations - 1. amplification
2. compensation
3. compression
4. demodulation
5. reject
(low or high) frequency and (low or high) amplitude, will cause an increase in the mechanical index and
the risk for cavitation - low frequency, high amplitude
give the c...
give the correct order of receiver operations - 1. amplification
2. compensation
3. compression
4. demodulation
5. reject
(low or high) frequency and (low or high) amplitude, will cause an increase in the mechanical index and
the risk for cavitation - low frequency, high amplitude
give the correct units for each:
circumference:
area:
volume: - circumference: cm
area: cm squared (cm^2)
volume: cm cubed (cm^3)
when PRP increases, frame rate .... - increases
period X number of cycles in a pulse = - pulse duration
2D imaging is best when the beam is at a ___ degree angle to the structure - 90 degree
Doppler evaluation is best when the flow is at a ____ degree angle to the ultrasound beam (cursor) -
0 degree
, if you increase the beam frequency, then your spatial pulse length gets _______ (shorter or longer) -
shorter
if you decrease the transmit frequency, then the beam width will (increase or decrease) - increase
when an image is frozen, an elipse can be used to measure the ____ of a structure - area
the time it takes for one pulse to occur - pulse duration
wider dynamic range, means more shades of grey, and a (lower or higher) contrast - lower
narrow dynamic range, means few shades of grey, and a (lower or higher) contrast - higher
LCD monitor accept the digital signal and do not need a ..... - digital to analog converter
flow is halved when length is - doubled
increased vessel length, increases resistance, which (increases or decreases) flow? - decreases
_____ loss is associated with acceleration and deceleration - inertia
flow is halved when resistance is - doubled
true or false? a successful doppler exam may be performed regardless of hematocrit? - true
maximum transmission will occur when a medium has an identical ______ as the initial medium -
impedance
snells law defines the physics of - refraction
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