Chapter 7 Ultrasound Physics Exam Solved Correctly To Score A+

Chapter 7 Ultrasound Physics Exam Solved Correctly To
Score A+
1. A sound wave is created by a
Time of flight equals depth multiplied by 13 uS.
trans- ducer, reflects off an
object, and re- turns to the 10cm x 13uS/cm = 130 uS
transducer. The depth of the
reflector is 10cm in soft tissue.
What is the go-return time?
The reflector depth is 2cm.
2. A sound wave is created by a
trans- ducer, reflects off an
object, and re-
turns to the transducer. The go-return 2 x 13 uS/cm = 26uS
time is 26uS. What is the depth of the
reflector?

3. A sound wave is created by a sonographer adjusts the
trans- ducer, reflects off an imaging depth to 20cm.
object, and re- turns to the What hap- pens to the
transducer. The go-return time is pulse repetion frequency?
26uS. What is the total dis-
tance that the pulse traveled? 6. The imaging depth (depth
of view) during an
4. The max imaging depth ultrasound exam is 10cm.
(depth of view) during an The sonographer adjusts
ultrasound exam is 10cm. The the imaging
sonographer adjusts the
imaging depth to 20cm. What
hap- pens to the pulse
repetition period?

5. The max imaging depth (depth
of view) during an ultrasound
exam is 10cm. The
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, Chapter 7 Ultrasound Physics Exam Solved Correctly To
Score A+
Total distance traveled is twice the depth of the re-
flector.

4cm



Doubles
PRP is directly related to imaging depth. When imaging
depth doubles, PRP doubles




It is halved.
PRF is inversely related to the imaging depth.




Halved
PRP is directly related to imaging depth




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