ARDMS - SPI Study
Which technique utilizes frequency modulation of the transmitted pulse to improve
signal to noise ratio? - Answer spatial compounding
Which angle of isonation to blood flow produces the maximum doppler shift? - Answer
180 degrees
Which imaging mode requires two elements mounted side by side? - Answer
continuous wave doppler
What is a benefit of using contrast agents? - Answer increased amplitude of the
returning dopplers
What is the most common cause of localized vertical nonuniformity in a real time b
mode image? - Answer improper time gain compensation
Which type of interaction between sound and tissue is most affected by the thermal
index (TI)? - Answer absorption
Which control allows adjustment for attenuation at specific depths? - Answer Time gain
compensation
Which condition must be present for refraction to occur? - Answer a difference in tissue
propagation speeds and oblique incidence
Which technique results in a three dimensional image? - Answer surface rendering
Which action can improve axial resolution of a displayed image? - Answer increasing
the transducer frequency
short spl
damping
Which scenario will produce no doppler shift to the receiver? - Answer source and
receiver moving at the same speed and direction
Which technique the sharpness of high contrast boundaries? - Answer edge
enhancement
A sound wave propagates fastest through which substance?
Bone
Muscle
Fat
or Gas - Answer Bone
In an unfocused transducer, what defines the region between the transducer face and
the point where the beam diverges? - Answer near field
Which technique utilizes frequency modulation of the transmitted pulse to improve
signal to noise ratio? - Answer spatial compounding
Which angle of isonation to blood flow produces the maximum doppler shift? - Answer
180 degrees
Which imaging mode requires two elements mounted side by side? - Answer
continuous wave doppler
What is a benefit of using contrast agents? - Answer increased amplitude of the
returning dopplers
What is the most common cause of localized vertical nonuniformity in a real time b
mode image? - Answer improper time gain compensation
Which type of interaction between sound and tissue is most affected by the thermal
index (TI)? - Answer absorption
Which control allows adjustment for attenuation at specific depths? - Answer Time gain
compensation
Which condition must be present for refraction to occur? - Answer a difference in tissue
propagation speeds and oblique incidence
Which technique results in a three dimensional image? - Answer surface rendering
Which action can improve axial resolution of a displayed image? - Answer increasing
the transducer frequency
short spl
damping
Which scenario will produce no doppler shift to the receiver? - Answer source and
receiver moving at the same speed and direction
Which technique the sharpness of high contrast boundaries? - Answer edge
enhancement
A sound wave propagates fastest through which substance?
Bone
Muscle
Fat
or Gas - Answer Bone
In an unfocused transducer, what defines the region between the transducer face and
the point where the beam diverges? - Answer near field
