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45 Cards in this Set
- Front
- Back
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Increase in Q-value of the transducer will result in a(n) __________ in Duty Factor.
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Decrease
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If the density of a medium decreases, what happens to the Frame Rate?
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It increases.
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If frequency decreases, what happens to Duty Factor?
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It increases.
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If a Q-value increases, what happends to Pulse Duration?
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It increases.
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If wavelength decreases, what happens to Duty Factor?
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It decreases.
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If depth doubles, what happens to the Pulse Repetition Frequency (PRF)?
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It is halved, or reduced by a factor of 2 or by 50%.
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If the Pulse Duration (PD) decreases, what happens to he Pulse Repeititon Period (PRP)?
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Nothing.
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If PRP increases, what happens to the Duty Factor (DF)?
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It decreases.
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If Spatial Pulse Length (SPL) decreases, what happens to the DF?
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It decreases.
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If PD increases, what happens to the DF?
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It increases.
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If SPL decreases, what happens to the PD?
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It decreases.
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If the numer of cycles in a pulse halves, what happens to the PD?
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It is halved, or reduced by a factor of 2 or by 50%.
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If wavelength decreases, what happens to the PD?
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It decreases.
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If PRF quadruples, what happens to the Frame Rate (FR)?
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It quadruples.
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If depth is doubled, what happens to the FR?
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It doubles.
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If the compressibility decreases, what happens to the FR?
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It decreases.
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A decrease in Q-value of a transducer will result in a(n) ___________ in SPL.
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Decrease.
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Increasing the Q-value of a transducer will result in a(n) ___________ in lateral resolution.
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no effect.
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A decrease in damping results in a(n) _________ in the Q-value.
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Increase.
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An increase in the Q-value of a transducer will result in a(n) __________ in PRF.
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No effect.
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An increase in diameter of a transducer crystal will result in a(n) __________ in lateral resolution.
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Decrease.
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A decrease in the diameter of a transducer crystal will result in a(n) ___________ in axial resolution.
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No effect.
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The fraction of time that pulsed ultrasound is actually on is the ______________.
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Pulse Duration.
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If the PRP increases, what happens to the FR?
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It decreases.
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If bulk modulus increases, what happens to the FR?
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It increases.
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If the number of elements in the array doubles, what happens to hte FR?
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It is halved or reduced by a factor of 2 or by 50%.
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If the imaging depth increases, what happens to the DF?
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It decreases.
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Damping material that is added tothe transducer assembly to limit the ringing of the transducer crystal after a pulse is generated does what?
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It increases bandwidth and decreases Q-factor.
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A decrease in damping results in a(n) _________ in the Q-value.
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Increase.
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An increase in Q-value of a transducer will result in a(n) ____________ in axial resolution.
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Decrease.
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What is the PD in a 3MHz transducer that emits a 4 cycle pulse?
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1.2 microseconds
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What is the SPL in a 3 cycle pulse, having a wavelength of 0.3 mm?
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.9mm
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If frequency increases, what happens to the PD?
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it decreases
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If wavelength decreases, what happens to the DF?
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it decreases
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If depth increases, what happens tohte PRFmax?
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It decreases.
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If PRP decreases, what happens to the DF?
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it increases.
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If SPL decreases, what happens to the DF?
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it decreases
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if PD increases, what happens to the DF?
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it increases
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If SPL decreases, what happens ot the PD?
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it decreases
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If the cycles in a pulse decreases, what happens to the PD?
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it decreases
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If wavelength decreases, what happens to the PD?
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it decreases
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If wavelength decreases, what happens to the PD?
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It decreases.
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If the FR increases, what happens to the PRF?
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It increases.
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If the crystal thickness increases, what happens to the SPL?
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It increases.
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If the PRP decreases, what happens to the DF?
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it increases
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