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Breast exam review ARDM(305 questions and answers).d
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Breast exam reviewARDM(305 questions
and answers)
Average propagation speed through soft tissue -
answer 1540m/s
Tissues with greater density (bone) have a higher
propagation speed causing structures to appear
more - answer Superficial
Tissues with lesser density (silicone implants) have
lower propagation speeds causing structures to
appear too - answer Deep
Artifact caused by a difference in propagation
speed causing structures to appear too superficial
or deep - answer Propagation speed error
Optimal transducer frequency for broad-bandwidth
breast imaging - answer 10MHz (or 7.5-13MHz with
a 1.5cm fixed elevation plane focus)
,Ability of a sono system to distinguish moving
structures or dynamics over time - answer
Temporal resolution
What type of resolution is not affected by scanning
superficial structures - answer Temporal resolution
Relates to the amplitude of a transmitted voltage
and affects the actual intensity of the beam -
answer Output power
Number of gray shades- measure of magnitude of
signals - answer Dynamic range
Expressed in decibels (dB) - answer Dynamic range
Ratio of smallest to largest signal that a system
can receive, process and display without disruption
- answer Dynamic range
Examiner can adjust dynamic range (shades of
gray) with two settingsb - answer TGC and
threshold compression settings
A low amplitude signal is shown as - answer Black
,A high amplitude signal is shown as - answer White
When a patient hums with power Doppler to
distinguish a mass from normal tissue - answer
Fremitus
A standoff pad must not exceed this size in order
to not affect the fixed elevation plane focus -
answer 1cm
Type of probe that sonographer cannot vary focus -
answer Mechanical sector
Three settings that affect amplitude - answer
Power, overall gain, TGC
Applies voltage - answer Power
Affects the brightness of echoes - answer Overall
gain
Affects brightness of echoes at different depths -
answer TGC
, Frequency causing less penetration and better
resolution - answer High
Frequency causing more penetration and
decreased resolution - answer Low
123 of the ABC-123 method indicates - answer
Distance from nipple
ABC of 123-ABC method indicates - answer Depth
Position best for scanning medial breast due to
flattening medial breast and continuity with chest
wall - answer Supine
Technique for scanning the main breast duct and
nipple in which the nipple is rolled over the index
finger - answer Two-handed technique
Probe allowing for imaging perpendicular to chest
wall, good near field imaging, reliable
measurements due to less beam divergence, and
frequency and focus options - answer 10MHz linear
array
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