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33 Cards in this Set
- Front
- Back
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To create an anatomic image, a sound _____________ must travel to a reflector located in the body and return to the transducer. |
Pulse |
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The Range Equation, Distance Formula, and 13 Micro-second Rule all determine? |
Depth of Scan (Reflector Depth and The Time of Flight) |
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The elapsed time from pulse creation to pulse reception is called? |
Go-Return time Time of Flight |
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The Time of Flight is _______________ related to how deep a sound pulse travels. |
DIRECTLY |
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The Time of Flight of an ultrasound pulse is ________________ for a shallow reflector. |
shorter |
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The Time of Flight of an ultrasound pulse is __________________ for a deeper reflector. |
longer |
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What is the Average Speed of Sound in Soft Tissue? |
1.54 mm/microsecond 1,540 m/s 154,000 cm/s |
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In the 13 Micro-second Rule, for every 1cm of reflector depth you multiply 13 micro-seconds to obtain the? |
Depth of Scan |
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With the 13 Micro-second Rule, a Time of Flight of 13 micro-seconds and a Reflector depth of 1 cm, gives us a Total Distance Traveled of? |
2 cm *distance from the transducer to the reflection and back |
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Distance from the Transducer to the Reflector is called? |
Depth |
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With the 13 Micro-second Rule, A Total Distance Traveled of 4 cm, would mean the Time of Flight and Reflector Depth would be what? |
Time of Flight = 26 micro-seconds Reflector Depth = 2 cm |
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With the 13 Micro-second Rule, a Reflector Depth of 3 cm, would mean the Time of Flight and Total Distance Traveled would be? |
Time of Flight = 39 micro-seconds Total Distance Traveled = 6 cm |
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The Total Distance that a pulse travels is _____________ the Reflector Depth. |
Twice (2x) |
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When a sonographer adjusts the machines maximum imaging depth, the ____________________ is being altered. |
Pulse Repetition Period (PRP) |
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The time from the start of one pulse to the start of the next pulse is called? |
Pulse Repetition Period (PRP) |
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Term for the go-return (time of flight) of a sound pulse between the transducer and the bottom of the image (reflector) is? |
Pulse Repetition Period (PRP) |
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When the depth of view is shallow, the PRP is _______________. |
Short |
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When the depth of view is deep, PRP is _____________. |
Long |
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PRP is _______________ related to the maximum imaging depth. |
Directly |
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When the depth of view is shallow, the PRF is ____________. |
High |
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When the depth of view is deep, the PRF is ______________. |
Low |
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Pulse Repetition Frequency is ________________ related to the maximum imaging depth. |
Inversely |
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Which method(s) determine the Time of Flight of a pulse wave? |
Range Equation Distance Formula 13 Micro-Second Rule *all of these are the same thing, gives us the depth of scan |
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The Time of Flight is ____________ related to how deep the Reflector is located. |
Directly *greater (deeper) the distance, the longer the time |
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Time of Flight of an Ultrasound pulse is ______________ with shallower reflectors, and ______________ with deeper reflectors. |
Shorter w/ shallower Longer w/ deeper |
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Which method(s) give us the depth of scan? |
Range Equation Distance Formula 13 Micro-Second Rule |
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In the 13 Micro-second Rule, for every ______ cm of depth, you multiply by 13 to get the Time of Flight. |
1 cm |
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With the 13 Micro-second Rule, a Time of Flight of 52 micro-seconds, would mean the Reflector Depth and Total Distance Traveled would be?
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Reflector Depth = 4 cm Total Distance Traveled = 8 cm |
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Pulse Repetition Period is ______________ related to the maximum Imaging Depth. |
Directly |
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When the Imaging depth is deep, the Pulse Repetition Period is ____________. |
Long |
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When the Pulse Repetition Period is short, the Imaging depth is _____________. |
Shallow |
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If the Imaging depth is deep, the Pulse Repetition Frequency is ____________. |
Low |
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If the Pulse Repetition Frequency is high, the Imaging depth is ______________. |
Shallow |
