Ultrasound Physics
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | pulses
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| show | actual time
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| show | Pulse duration
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| The typical value of pulse duration in diagnostic ultrasound is what? | show 🗑
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| show | sound source
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| show | No
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| What is the formula for pulse diration? | show 🗑
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| Pulse duration is _______ related to the number of cycles. | show 🗑
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| show | directly
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| Pulse duration is _______ proportional to the frequency. | show 🗑
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| show | short
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| show | spatial pulse length
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| show | distance
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| What are the typical values of spatial pulse length in soft tissue? | show 🗑
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| What determines pulse length? | show 🗑
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| show | No
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| show | # cycles x wavelength (mm)
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| show | directly
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| show | directly
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| show | inversely
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| Pulse duration is the ______ that a pulse is "on" and is typically measured in microseconds. | show 🗑
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| show | distance
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| show | Pulse repetiton period
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| show | ms
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| show | sound source
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| Can the sonographer adjust the pulse repetition period? | show 🗑
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| show | increases
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| show | decreases
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| _________ ________ _______ is the number of pulses that an ultrasound system transmits into the body each second. | show 🗑
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| show | Hz
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| The typical valu of pulse repetition frequency is: | show 🗑
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| Pulse repetition frequency is determined by the _______. | show 🗑
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| Can the sonographer adjust the pulse repetition frequency? | show 🗑
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| As depth of view increases, pulse repetition frequency _____. | show 🗑
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| show | increases
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| An ultrasound machine is imaging to a depth of 2 cm. Would the pulse repetition frequency be described as high or low? | show 🗑
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| show | it is reduced
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| show | inversely
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| PRF x PRP= | show 🗑
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| What is the complementary metric unit for PRP? | show 🗑
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| show | hertz
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| True or False. Two waves can have identical pulse repetition frequencies, even if their pulse repetitoin periods are different. | show 🗑
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| show | True. Period and pulse repetiton frequency are unrelated.
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| True or False. Two waves can have identical PRFs, even if their frequencies are different. | show 🗑
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| show | True
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| What describes the percentage or fraction of time that the system is transmitting a pulse? | show 🗑
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| What determines duty factor? | show 🗑
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| Is duty factor adjustable? | show 🗑
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| show | shallow imaging
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| More listening, longer PRP, lower PRF and lower duty factor= | show 🗑
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| When all other factors remain unchanged, what happens to the duty factor when the PRF increases? | show 🗑
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| If all other factors remain unchanged, what happens to the duty factor when the PRP increases? | show 🗑
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| If all other factors remain unchanged, what happens to the duty factor when imaging depth increases? | show 🗑
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| If all other factors remain unchanged, what happens to the duty factor when the sonographer uses a new transducer with a longer pulse duration? | show 🗑
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| show | 0.001
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| ________ is the time from the start of a pulse to the end of that pulse. | show 🗑
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| ________ is the time from the start of a pulse to the start of the next pulse. | show 🗑
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| show | pulse repetition period
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Created by:
jady1999