SPI EXAM PACKAGE DEAL WITH 100 % CORRECT ANSWERS

_______ ______ Artifact (AKA _____ _________ Artifact) occurs when the slice thickness is WIDER than the structure being imaged - ️️Partial Volume Artifact (AKA Slice thickness artifact) When The spatial resolution is equal in all dimensions or imaging planes, it is considered _________ Reso...

What will happen to the patients body is HE/SHE is in shock? - ️️drop in blood pressure decreased respiration tachycardia chest pain loss of mental alertness What describes the distance from the beginning of a cycle to the end of that cycle? - ️️wavelength What are the three primary ...

Spatial Pulse Length is directly proportional to - ️️the Number of Cycles in the Pulse and the Wavelength (Directly Proportional means that increased SPL will increase both the number of cycles in the pulse and the wavelength if increased). Spatial pulse length is inversely proportional to...

Definition of Duty Factor? - ️️The percentage of time the pulse is on -Unitless (just a number) -For continuous wave, duty factor = 100% -For pulsed wave, Duty Factor is less than 1% What are the two types of Ultrasound Waves? - ️️1.) Electromagnetic - Wave travels through a vacuum. 2....

Which of the following statements about speed and attenuation are true? a. Attenuation through and propagation speed in a particular medium are unrelated to each other. b. When a sound beam travels faster in a medium, the attenuation is less. c. When a sound beam travels slower in a medium, the ...

Which of the following is not a potential cause of artifact and diagnostic imaging? A. Operator error B. equipment malfunction C. Patient motion D. Ultrasound physics E. none of the above - ️️E. none of the above The four choices, A through D, represent the primary explanations of artifact...

a transverse wave has particles that move in a - ️️perpendicular direction (right angles or 90 degrees) to the wave direction acoustic variables identify which waves are sound waves, when an acoustic variable changes in time a - ️️sound wave is present length is measured in - ️️cm, f...

What is the best estimate of the distance that sound can travel in soft tissue in one second? - 1 yard - 100 yards - 1 mile - 10 miles - ️️1 mile Which of the following is NOT one of the physical processes that contributes to attenuation of US waves passing through soft tissue? - reflect...

Ultrasound waves that are traveling through a medium consist of a. electromagnetic and radio frequencies b. compressions and refractions c. electromagnetic and ionizing frequencies d. compressions and rarefactions - ️️d. What is the difference between audible sound and ultrasound? a. audib...

The time from the beginning of a pulse until its end is ______________? - ️️pulsed duration If the frequency of US is increased from 0.77MHz to 1.54MHz, what happens to the propagation speed? - ️️remains the same All of the following are true EXCEPT: - ️️two waves with identical freq...

All of the following are true EXCEPT: a) two waves with identical frequencies must interfere constructively. b) constructive interference is associated with waves that are in-phase. c) out-of-phase waves interfere destructively. d) waves of different frequencies may exhibit both constructive and...

Destructive vs constructive interference - ️️Constructive interference occurs when two waves overlap at the same location at the same point in time ( in phase) and the new combined wave has an amplitude greater than the original two waves. Destructive interference occurs when the waves are ou...

Which of the following adjustments will improve temporal resolution on color Doppler? A. steer the sample box B. increase the wall filter C. decrease sample size D. increase color gain - ️️C. decrease the sample size While using the same type of ultrasound system, a 5MHz continuous wave and...