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