SPI

1. Directly related means a. when one item increases or decreases, the second item responds the same direction b. when one item increases, the second item remains independent c. when one item increases, the change in the second item depends on additional factors 2. Two quantities are proportional if an increase in one quality leads to a/an _________ in the other. a. Increase b. Decrease c. increase in same ratio d. requires more than one factor for change 3. Proportionally related ...

Which of the following console controls will have NO effect on the dynamic range? A. rejection B. suppression C. compression D. output power CORRECT ANSWERS: D. output power What can be done to improve the visualization of the anterior aortic wall? A. Angle the probe until the ultrasound beam is perpendicular to the aortic wall. B. Angle the probe to create an oblique angle between the probe face and the aortic wall. C. Increase the overall gain. D. Decrease the threshold setti...

What can be done to reduce the Mechanical Index level during an exam? A. reduce output power B. decrease probe frequency C. increase the threshold setting D. use contrast materials on the exam CORRECT ANSWERS: A.) reduce output power All of the following statements are true regarding equipment preparation for beginning an ultrasound exam, except? A. In order to reduce exam time, the proper exam preset must be used for each exam. B. Adjust the height of the chair to allow your wrist...

Metric notations: giga, mega, kilo, hecto, deca, deci, centi, milli, micro, and nano correct answers 10 to the... Giga 9, mega 6, kilo 3, hecto 2, deca 1, deci -1, centi -2, milli -3, micro -6, nano -9 Complimentary metric units: what goes with giga? Mega? Hecto? Deca? correct answers Giga+nano Mega+micro Hecto+centi Deca+deci Sounds must travel though a (blank) it cant travel through a (blank) correct answers Medium, vacuum Sounds is a (blank) wave correct answers Mechan...

Attenuation CORRECT ANSWERS: Its the decrease in intensity, power and amplitude and the sound wave travels through a medium. Is attenuation related to the propagation speed? CORRECT ANSWERS: NO! because although the sound wave in becoming weaker it is still traveling in the same medium therefore the propagation speed (C) remains constant. What are the three components of attenuation? CORRECT ANSWERS: 1. Absorption ( when the energy is turned into heat) 2. Scattering (when the sound tra...

The half intensity depth for a 2MHz transducer in soft tissue is CORRECT ANSWERS: 3cm Attenuation is lowest in which of the following mediums CORRECT ANSWERS: water Increasing frequency will result in all the following except CORRECT ANSWERS: a. range resolution improvement b. transverse resolution improvement c. increase depth of penetration d. decrease in beam diameter Ultrasound transducers utilize which effect upon transmission CORRECT ANSWERS: reverse piezoelectric Ultra...

What action below would be most in keeping with the ALARA principle while performing a diagnostic ultrasound examination? A: Allow multiple students to scan an obstetrical patient because the fetus is in a good position for imaging. B: Prolong the sonogram to make videos of the fetus for each family member. C: Complete the diagnostic scan in a timely fashion at the lowest output power that achieves a quality image. D: Maximize the acoustic output to brighten the overall image. E: Extend...

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 obje...