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SPI Practice Test questions with correct answers

SPI PRACTICE QUESTIONS with correct answers

Reducing the likelihood of bioeffects from acoustic energy is the mission of the: A. Nyquist limit B. Reynolds number C. Huygens principle D. ALARA principle E. Poiseuille principle - Answer- D. ALARA principle The number of cycles in a pulse directly related to the: A. Duty factor B. SPL C. operating frequency D. PRF E. propagation speed of the medium - Answer- B. SPL The Doppler shift frequency is proportional to the: A. Cosine values B. Doppler angle C. Oper...

Sound waves are: - Answer- longitudinal, mechanical The speed of sound in soft tissue is closest to: - Answer- 1,500 m/s The frequency closest to the lower limit of ultrasound is: - Answer- 15,000 Hz Which is not an acoustic variable? - Answer- intensity The effects of soft tissue on ultrasound are called: - Answer- acoustic propagation properties All of the following are true EXCEPT: - Answer- two waves with identical frequencies must interfere constructively Put in decreasing...

13 microsecond rule correct answers the rule that states that it takes 13 microseconds for sound to travel 1 cm in soft tissue absorption correct answers the conversion of sound energy to heat acoustic cavitation correct answers the production of bubbles in a liquid medium acoustic speckle correct answers the interference pattern caused by scatterers that produces the granular appearance of tissue on a sonographic image AUIM test object correct answers an outdated test object that us...

Pulsatile Flow - Answer- Flow that Accelerates and decelerates w/ each cardiac cycle Infrasound - Answer- Below the range of human hearing, less that 20 Hz Audible Sound - Answer- The range of human hearing 20-20,000Hz ALARA - Answer- (as low as reasonably achievable) provides the least amount of energy exposure possible to the patient Compression - Answer- Squeezing signal amplitudes into a narrower range Ultrasound - Answer- Above the range of human hearing, greater than 20,000 ...

What is frame rate? correct answers Ability of the system to create numerous frames each second What is frame rate determined by? correct answers Propagation speed Depth of imaging Scan lines per frame Transmit pulses per line What is the units for frame rate? correct answers Hertz What is temporal resolution resolution determined by? correct answers Frame rate Frame rate: correct answers Frames per second Frame time: correct answers Frame period How does depth affect fram...

When will the Doppler shift be the highest? A.when the beam is parallel to the direction of flow B.when the beam is at a 45 degree angle to flow C.when the beam is perpendicular to the direction of flow D. Doppler shift is unrelated to beam angle - ANSWER A.when the beam is parallel to the direction of flow Which of the following best describes the principles of hemodynamics? -The pressure difference required for blood to flow -The pressure created in a fluid system -A fluid's ability...

SPI Exam Questions with correct answers