Which action may reduce the number of lines in a frame without a loss of temporal resolution?
Which target group in this image of a tissue-mimicking phantom is used to evaluate axial resolution?
According to Poiseuille's law, a change in which parameter would have the greatest influence on blood flow?
Which setting can be increased to correct for clutter artifact when using pulsed-wave Doppler?
Increasing which setting could enhance the visibility of acoustic shadowing posterior to a calcified object?
What adjustment is needed to visualize the borders of the anatomical structures in the image below?
Which statement characterizes the primary difference between image A and image B?
Which resolution can be evaluated in the area indicated by the red oval in this image of a tissue-equivalent phantom?
What sonographic artifact can result in a reflector that appears shallower than its true location?
What is the term for the change in direction of a sound wave crossing a tissue boundary at an oblique angle?
Which spectral Doppler finding can occur when using a low pulse repetition frequency setting?
Which adjustment will improve visualization of blood flow if color extends outside the boundary of the vessel walls?
Which pulsed-wave Doppler adjustment would be appropriate to correct the aliasing seen in this image?
What angle of the color box in relation to a normal vessel could result in no visible color flow?
Which adjustment follows the ALARA (As Low As Reasonably Achievable) principle of patient safety?
Which Doppler control adjustment could eliminate the end-diastolic velocity in the Doppler spectrum?
Which gray-scale artifact occurs when a structure attenuates less than the adjacent tissues?
Which pulsed-wave Doppler adjustment would be appropriate to correct the aliasing seen in this image?
How is the wavelength affected when switching from a 10 MHz transducer to a 5 MHz transducer?
Which component of a transducer lowers the acoustic impedance mismatch between the transducer and the patient?
What combination of transmitting frequency and depth produces the greatest ultrasound beam attenuation?
Which color Doppler setting can be optimized to eliminate low-frequency Doppler shifts without having any effect on higher Doppler frequency shifts?
What is an advantage of using pulsed wave Doppler as compared to using continuous wave Doppler?
What is the primary determining factor of a pulsed wave transducer's fundamental frequency?