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Understanding Ultrasound Physics
SPI Exam Prep
10
Medical
Professional
06/01/2012

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Cards

Term
Define "Period"
Definition
The TIME it takes a wave to vibrate a single cycle, or the TIME from the start of a cycle to the start of the next cycle.
Term
Define "Frequency"
Definition
The number of particular events that occurs in a specific duration of TIME.
Term
What are the units for PERIOD?
Definition
Period is reported in units of TIME, such as seconds, milliseconds, hours, or days.
Term
What is the typical value range of PERIOD in diagnostic ultrasound?
Definition
They typical value of period in diagnostic ultrasound is:

0.1 to 0.5 µs
Term
Is PERIOD determined by the source or the medium?
Definition
source only
Term
Is PERIOD adjustable by the sonographer?
Definition
No
Term
What are the units for FREQUENCY?
Definition
Frequency is reported in units of per second, 1/second, hertz, or Hz.

1 cycle/second = 1 Hz
Term
What is the typical value range of FREQUENCY in diagnostic ultrasound?
Definition
In clinical imaging, frequency ranges approximately from 2 MHz to 10 MHz.
Term
Is FREQUENCY determined by the source or the medium?
Definition
source only
Term
Is FREQUENCY adjustable by the sonographer?
Definition
No
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