Term
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Definition
A collection of cycles that travel together |
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Term
Two components of Pulsed Ultrasound |
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Definition
Cycles: on time, transmit time
Dead time: off time, receive time, read time, listening time |
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Term
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Definition
The time from the start of a pulse to the end of that pulse, the actual time that the pulse is on |
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Definition
seconds, msec- any unit of time |
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Term
Pulse Duration determined by: |
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Definition
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Can Pulse duration be changed by sonographer? |
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Definition
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Typical Values of Pulse Duration |
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Definition
From 0.3-2.0 Usecs 2-4 cycles |
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Definition
The length or distance that a pulse occupies in space. The distance from the start to the end of one pulse. |
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Units of Spatial pulse Length |
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Definition
mm, meters, any unit of distance |
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Spatial pulse Length is determined by |
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Definition
Both the source and medium |
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Term
Can spatial pulse length be changed by the sonogropher? |
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Definition
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Term
Units of Spatial Space Length |
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Definition
mm, meters, any unit of distance |
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Term
Spatial Space Length is determined by |
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Definition
Both the source and medium |
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Term
Typical value of spatial pulse length |
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Definition
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Term
Equation for spatial pulse length |
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Definition
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Term
spatial pulse length is ___________ proportional to the number of cycles in the pulse and wavelength |
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Definition
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Spatial Pulse Length is _______ proportional to frequency |
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Definition
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Term
Many cycles and cycles with longer wavelength makes _____________ pulses |
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Definition
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Term
Fewer cycles and cycles with shorter wavelength creates _________ pulse length |
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Definition
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Term
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Definition
Pulse repetition period is the tie from the start of one pulse to the start of the next pulse. It includes one pulse duration and one "listening time" |
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Term
Units of Pulsed Repetition Period |
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Definition
seconds, minutes- any units of time |
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Pulse repetition period is determined by |
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Definition
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Can pulsed repetition period be changed by the sonographer |
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Definition
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Typical values of pulsed repetition period |
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Definition
from 100 microseconds to 1 milliseconds |
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Term
As imaging depth increases, PR period ____________ |
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Definition
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As imaging depth decreases, PR period ____________ |
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Definition
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