ARDMS - SPI Study Question with complete solution 2023

ARDMS - SPI Study Question with complete solution 2023Which technique utilizes frequency modulation of the transmitted pulse to improve signal to noise ratio? spatial compounding Which angle of isonation to blood flow produces the maximum doppler shift? 180 degrees Which imaging mode requires two elements mounted side by side? continuous wave doppler What is a benefit of using contrast agents? increased amplitude of the returning dopplers What is the most common cause of localized vertical nonuniformity in a real time b mode image? improper time gain compensation Which type of interaction between sound and tissue is most affected by the thermal index (TI)? absorption Which control allows adjustment for attenuation at specific depths? Time gain compensation Which condition must be present for refraction to occur? a difference in tissue propagation speeds and oblique incidence Which technique results in a three dimensional image? surface rendering Which action can improve axial resolution of a displayed image? increasing the transducer frequency short spl damping Which scenario will produce no doppler shift to the receiver? source and receiver moving at the same speed and direction Which technique the sharpness of high contrast boundaries? edge enhancement A sound wave propagates fastest through which substance? Bone Muscle Fat or Gas Bone In an unfocused transducer, what defines the region between the transducer face and the point where the beam diverges? near field