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NO.32 Which adjustment follows the ALARA (As Low As Reasonably Achievable) principle of patient safety?

NO.33 Which artifact may be caused by incorrect color Dopplergain setting?

NO.34 Which color Doppler artifact is visualized in this image?

NO.35 Which target group is used to evaluate transverse distance measurement accuracy in this tissue-mimicking phantom image?

NO.36 What is an advantage of power Doppler over color Doppler?

NO.37 Which artifact is seen as a result of an increase in echo amplitude in the tissue located distal to an anechoic structure?

NO.38 Which change was made after acquiring image A to produce image B?

NO.39 What produces increased attenuation within soft tissue?

NO.40 Which factor does a string phantom evaluate?

NO.41 Which resolution can be evaluated in the area indicated by the red oval in this image of a tissue-equivalent phantom?

NO.42 Which unfocused transducer will have the greatest divergence?

NO.43 In this image, which artifact is demonstrated?

NO.44 Which feature is a characteristic of continuous wave Doppler?

NO.45 What reduces speckle and increases visualization of specular reflectors and attenuated structures?

NO.46 What is the primary interaction that occurs when sound waves encounter a smooth, flat surface?

NO.47 What is the term for the change in direction of a sound wave crossing a tissue boundary at an oblique angle?