URR SPI Questions With Complete Solutions.
give the correct units for each:
circumference:
area:
volume: - correct answer. circumference: cm
area: cm squared (cm^2)
volume: cm cubed (cm^3)
when PRP increases, frame rate .... - correct answer. increases
period X number of c...
give the correct units for each:
circumference:
area:
volume: - correct answer. circumference: cm
area: cm squared (cm^2)
volume: cm cubed (cm^3)
when PRP increases, frame rate .... - correct answer. increases
period X number of cycles in a pulse = - correct answer. pulse duration
2D imaging is best when the beam is at a ___ degree angle to the structure - correct
answer. 90 degree
Doppler evaluation is best when the flow is at a ____ degree angle to the ultrasound
beam (cursor) - correct answer. 0 degree
if you increase the beam frequency, then your spatial pulse length gets _______
(shorter or longer) - correct answer. shorter
if you decrease the transmit frequency, then the beam width will (increase or decrease)
- correct answer. increase
when an image is frozen, an elipse can be used to measure the ____ of a structure -
correct answer. area
the time it takes for one pulse to occur - correct answer. pulse duration
wider dynamic range, means more shades of grey, and a (lower or higher) contrast -
correct answer. lower
, narrow dynamic range, means few shades of grey, and a (lower or higher) contrast -
correct answer. higher
(low or high) frequency and (low or high) amplitude, will cause an increase in the
mechanical index and the risk for cavitation - correct answer. low frequency, high
amplitude
LCD monitor accept the digital signal and do not need a ..... - correct answer. digital to
analog converter
flow is halved when length is - correct answer. doubled
increased vessel length, increases resistance, which (increases or decreases) flow? -
correct answer. decreases
_____ loss is associated with acceleration and deceleration - correct answer. inertia
flow is halved when resistance is - correct answer. doubled
true or false? a successful doppler exam may be performed regardless of hematocrit? -
correct answer. true
maximum transmission will occur when a medium has an identical ______ as the initial
medium - correct answer. impedance
snells law defines the physics of - correct answer. refraction
reflection will always occur with different impedances AND _______ incidence - correct
answer. perpendicular incidence
refraction will occur with different speeds and _____ incidence - correct answer.
oblique
dynamic range is a ______ measurement - correct answer. relative
PACS systems are most likely to be _____ not analog - correct answer. digital
means many gray shades - correct answer. wide dynamic range
using a lens is a form of _____ focusing - correct answer. transmit
dynamic aperature is a form of _____ focusing
(receive or transmit) - correct answer. receive
to get a lower frequency, you need a (thinner or thicker) crystal - correct answer.
thicker
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