Edelman

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Author:
holy
ID:
203708
Filename:
Edelman
Updated:
2013-02-26 23:13:44
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E7
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E7
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  1. 1. A sound wave is created by transducer, reflects off an object, and returns to the transducer. The depth of reflector is 10cm in soft tissue. What is the go-return time?
    D.10*13µs = 130µs
  2. 2. A sound wave is created by a transducer, reflects off an object, and returns to the transducer. The go- return time is 26µs. what is the depth of reflector?
    B. 2cm
  3. 3. A sound wave is created by a transducer, reflects off an object, and returns to the transducer. The go- return time is 26µs. what is the total distance that the pulse traveled?
    D. 4cm
  4. 4. The maximum imaging depth (depth of view) during an ultrasound exam is 10cm. The sonographer adjusts the imaging depth to 20 cm. what happens to pulse repetition period?
    C. it is doubled
  5. 5. The maximum imaging depth during an ultrasound exam is 10 cm. The sonographer adjusts the imaging depth to 20 cm. what happens to pulse repetition frequency?
    B. it is halved
  6. 6. The imaging depth during an ultrasound exam is 10cm. The sonographer adjusts the imaging depth to 5 cm. what happens to pulse repetition period?
    B. it is halved
  7. 7. A sound wave is created by a transducer, reflects off an object, and returns to the transducer. The imaging depth is 10 cm in soft tissue. What is the maximum pulse repetition frequency?
    B. 7.7 kHz
  8. 8. A sound wave is created by a transducer, reflects off an object, and returns to the transducer. The maximum imaging depth is 7.7 cm. what is the PRF? 77,000/7.7=10,000 Hz
    C. 10,000 Hz
  9. 9. A sound wave is created by a transducer, reflect off an object, and
    returns to the transducer. The go- return time is 130µs. what is the
    maximum PRF?
    A. 7,700 Hz
  10. 273. how long does it take for sound to make a round trip to and from the skin’s surface to a reflector 1 cm depth in soft tissue?
    A. 13µs
  11. 274. on reflector is 5 times deeper than another. The time of flight of sound to the deeper structure is the time of flight of the shallower reflector.
    D. five times more than
  12. 275. in soft tissue, sound travels to a reflector and back to the transducer in 39 µseconds. How deep is the reflector? C. 3cm
  13. 276. in soft tissue, sound travels to a reflector and back to the transducer in 39 µs (39 microseconds or 39 millionths of a second). What is the total distance that the pulse traveled?
    B. 6cm

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