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Ultrasonography-physics-1

48 Questions  I  By Taofu2009la
Sonography Quizzes & Trivia
Quiz to test your basic definion, concept and knowldge. It will increase your score by 20-50% in 2--4 weeks.

  
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1.  Which of the following is not user-adjustable?
A.
B.
C.
D.
E.
2.  True or FalseThe spatial pulse length usually decrease when operating frequency is changed to high
A.
B.
3.  True or False?A pulse with a long pulse duration is likely to have a narrow badwidth?
A.
B.
4.  Which of the following interation of sound and tissue decreases the intensity of the transmitted beam
A.
B.
C.
D.
E.
5.  Relative measurement of intensity based on a logarithmic scale is expressed in:
A.
B.
C.
D.
E.
6.  Beam steering is achieved in a linear phase array by
A.
B.
C.
D.
7.  True or FalseImaging transducers are usually of high rather than low bandwidth.
A.
B.
8.  True or FalseMoving from grey-scale only to full-screen color flow imaging in a system means that the image frame rate will probably increase.
A.
B.
9.  Which of the following crystals will produce sound with the lowest frequency?
A.
B.
C.
D.
10.  One begins reading a color flow image by
A.
B.
C.
D.
11.  True or FalseSampling intervals for cardiac flow imaging and vascular flow imaging are similar
A.
B.
12.  What system control can you adjust to compensate for the effect of sound attenuation  in the body
A.
B.
C.
D.
E.
13.  The normal range of wave length in medical application  is
A.
B.
C.
D.
14.  Which factor least influences axial resolution?
A.
B.
C.
D.
E.
15.  Acoustic exposure can be changed by which of the following using pulsed-wave Doppler?
A.
B.
C.
D.
E.
16.  Which of the following is not a component of the time-gain compensation (TGC) curve?
A.
B.
C.
D.
17.  True or False?The SPTA intensity will always be larger than the SATA intensity.
A.
B.
18.  The edge shadowing occurs in which of following situations
A.
B.
C.
D.
19.  An annular array real-time scanner
A.
B.
C.
D.
20.  What do you do when you want to decrease a very bright echoes on the display?
A.
B.
C.
D.
E.
21.  The mirror image artifact is commonly seen around which of the following structures?
A.
B.
C.
D.
22.  A transducer with a large bandwidth is likely to have
A.
B.
C.
D.
23.  True or False?Lateral resolution improves with frequency.
A.
B.
24.  Color flow imaging in the heart typically uses
A.
B.
C.
D.
25.  What interaction of ultrasound and tissue  is primarily responsible for imaging the internal structure of organs?
A.
B.
C.
D.
E.
26.  Q factor refers to
A.
B.
C.
D.
27.  Axial resolution is determined by which of the following?
A.
B.
C.
D.
E.
28.  What happen to the reflected echo signal if you use a transducer with bandwidth between 2-5 MHz?
A.
B.
C.
D.
E.
29.  Which of the following will not cause a redirection of part of the ultrasound energy?
A.
B.
C.
D.
E.
30.  The shadow behind the stone can be best explained as which of following sound-tissue interaction?
A.
B.
C.
D.
E.
31.  Which of the following is true?
A.
B.
C.
D.
32.  What happen to the reflected echo signal if you use a transducer with bandwidth between 2-5 MHz?
A.
B.
C.
D.
E.
33.  The amount of energy transmitted and/or reflected at the boundary between two media depends on
A.
B.
C.
D.
34.  True or False?In a pulse-echo system, the quality factor should be made as large as possible.
A.
B.
35.  True or FalseSmaller transducers always produce smaller beam diameters
A.
B.
36.  The number of frames per second necessary for a real-time image to be flicker free is 
A.
B.
C.
D.
37.  Diffraction refers to
A.
B.
C.
D.
38.  Which of the following combinations of frequency and intensity would most likely result in cavitaion?
A.
B.
C.
D.
39.  Increase the pulse repetition period
A.
B.
C.
D.
40.  Turbulence in a vascular color flow image appears as
A.
B.
C.
D.
41.  True or False?Increasing a sonograph's output power levels and PRF to increase penetration and frame rate can produce an artifact of high-frequency aliasing.
A.
B.
42.  The comet tail artifact can be seen posterior to an object that has
A.
B.
C.
D.
43.  The range of pulse repetition frequencies used in diagnostic ultrasound is
A.
B.
C.
D.
44.  A transducer with a large bandwidth is likely to have
A.
B.
C.
D.
45.  The transducer that would be best suited for intercostal scanning is
A.
B.
C.
D.
46.  What is distinction between real-time scans and B-scans?
A.
B.
C.
D.
47.  True or False?A linear sequenced array cannot be dynamically focused.
A.
B.
48.  Pulsing of the transmitted sound wave is necessary for real-time imaging because:
A.
B.
C.
D.
E.
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