EMT Practice Test

1. Question Content...

---

Question1: Which change was made after acquiring image A to produce image B?

Question2: Which system control adjusts amplification of signals as a function of depth?

Question3: What does damping in a pulsed-wave transducer affect?

Question4: Which factor influences color flow imaging frame rate?

Question5: Which type of display process rescans only the region of interest and improves resolution?

Question6: What is the primary factor that improves lateral resolution?

Question7: Which settings will lead to the highest temporal resolution?

Question8: Which target group is used to evaluate transverse distance measurement accuracy in this tissue-mimicking phantom image?

Question9: What happens to the Doppler shift when the angle is changed from 30 to 60 degrees?

Question10: Which technique averages individual frames together to improve the image?

Question11: Which factor improves axial resolution?

Question12: Which pulsed-wave Doppler adjustment would be appropriate to correct the aliasing seen in this image?

Question13: Which adjustment resulted in the change from image A to image B?

Question14: Which adjustment would reduce the noise in the Doppler waveform in this image?

Question15: In this image obtained from a tissue-mimicking phantom, which area of the sector is used to evaluate the dead zone?

Question16: How is intensity of an ultrasound beam measured?

Question17: What occurs when the pulse repetition frequency is less than twice the Doppler shift frequency?

Question18: Which feature is a characteristic of continuous wave Doppler?

Question19: What is a potential negative consequence of using a high wall filter?

Question20: Which resolution is improved by focusing?

Question21: Which index is related to the likelihood of cavitation?

Question22: Which color Doppler artifact is visualized in this image?

Question23: What improves the temporal resolution of color flow imaging?

Question24: What does this image demonstrate?

Question25: Which change can be made in order to avoid exceeding the Nyquist limit?

Question26: Which method of sanitizing the transducer would damage piezoelectric crystals?

Question27: What is the relationship between overall gain and image brightness?

Question28: During 3-D volume acquisition, the quality of the images is most dependent upon which factor?

Question29: Which factor affects temporal resolution?

Question30: What is the benefit of using a wall filter?

Question31: Which is a method to reduce noise?

Question32: Which setting can be increased to correct for clutter artifact when using pulsed-wave Doppler?

Question33: Which color control was adjusted in color bar A to produce color bar B?

Question34: Which statement characterizes the primary difference between image A and image B?

Question35: Which resolution capability is most affected by spatial pulse length?

Question36: What determines the resonant frequency of a pulsed wave transducer?

Question37: Which will affect the gray-scale of a 2-D image?

Question38: What is effected by increasing the color scale?

Question39: In this image, what does the data below the baseline represent?

Question40: If the pulse repetition frequency is 3 kHz, what is the maximum Doppler shift that can be detected without aliasing?

Question41: During a color Doppler scan, which angle to flow would most likely result in no color being visualized?

Question42: What is the function of M-mode?

Question43: Which machine setting could cause aliasing to occur?

Question44: What is the primary reason to use compression?