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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Term
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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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Term
| Can Pulse duration be changed by sonographer? |
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Definition
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Term
| Typical Values of Pulse Duration |
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Definition
| From 0.3-2.0 Usecs 2-4 cycles |
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Term
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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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Term
| Units of Spatial pulse Length |
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Definition
| mm, meters, any unit of distance |
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Term
| 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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Term
| 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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Term
| Pulse repetition period is determined by |
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Definition
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Term
| Can pulsed repetition period be changed by the sonographer |
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Definition
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Term
| 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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Term
| As imaging depth decreases, PR period ____________ |
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Definition
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Term
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Definition
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