part 1
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 | Focusing
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| show | Focal zone
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| If the beam tx-r Q is high, its bandwidth is... | show 🗑
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| show | Shorter impulse length
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| show | Contains a range of frequencies
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| If (2) sound beams have the same acoustic power, the one with the _______ will have the highest intensity. | show 🗑
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| Compared to audiable sound, the frequency of ultrasound is ________. | show 🗑
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| show | c) 1 mhz
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| show | decreases (Wavelength = PS/F
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| PS increases with _______ increases. a) density b) stiffness | show 🗑
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| To increase the depth of penetration of a sound beam, we must __________. a)Decrease freq. b)Increase velocity | show 🗑
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| show | c)axial resolution (axial res.= SPL/2
= # of cycles in a pulse X Wavelength(wavelength= PS/F)
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| Which UNFOCUSED tx-r would provide to the LONGEST focal length? a) 10mhz, 6mm b) 7.5mhz, 6mm c)10mhz, 4mm d)7.5mhz, 4mhz | show 🗑
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| The speed of sound in soft tissue is ___m/s | show 🗑
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| show | b) 2-12mhz
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| show | d) both b & c (freq & intensity)
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| show | total atten.=atten. coef. x depth (atten. coef. = f/2)
Total atten.= 6/2 x 10cm
Total atten.= 3db/cm x 10 cm
Total atten.= 30db
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| show | d)7.5mhz (higher freq. due to attenuation for more superficial parts
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| What can you do to improve the Temporal Resolution? | show 🗑
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| Which intensity level is always going to be the lowest? | show 🗑
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| show | A strong reflector
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| show | The T.G.C. control compensates for the effects of attenuation by progressively increasing the amount of amplification applied to signals with depth (time).
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| Intensity Reflection Coefficient equation: | show 🗑
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| show | The related sound in (2) mediums
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| show | PS = Propagation Speed
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| A sound wave leaves the tx-r and travels through soft tissue, 1 sec later the echo returns to the tz-r. What is teh distance from the tx-r to the reflection that produced the echo. | show 🗑
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| show | shorter wavelength and less penetration.
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| Bright areas in grey scale imaging indicate: | show 🗑
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| show | 3db = 50% or halved.
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| The impedance formula = | show 🗑
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| show | 4
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| show | b) lateral resolution
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| Which of the following is a characteristic of a medium through which sound is propagating | show 🗑
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| show | Will completely transmit
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| show | reflection & transmission angle
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| Increase in Spacial Pulse Length... | show 🗑
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| Place the following media in order of increasing sound propagation speed from slowest to fastest: Gas, Solid, and Liquid | show 🗑
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| If the frequency of sound is above 20khz, what kind of sound spectrum is it? | show 🗑
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| show | Pulse duration
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| Te propagation speed of a sound wave is primarily dependent on ______ through which sound is being transferred. | show 🗑
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| What are the units for DF (duty factor) | show 🗑
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| Wavelength is the measure of _____. | show 🗑
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| How many cycles are there in 1 sec continuous wave 3mhz? | show 🗑
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| The fraction of time that a pulse is actually ON (formula to determine answer) | show 🗑
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| Period when applied to US is: | show 🗑
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| show | Increase
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| Source can be described as: | show 🗑
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| The PRF # of pulses ______. | show 🗑
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| SPL is = | show 🗑
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| Acoustic impedance is: | show 🗑
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| Which of the following increases as frequency increases... | show 🗑
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| show | linear array
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| The non-focused tx-r's another name for near = | show 🗑
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| show | adding matrix boards
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To hide a column, click on the column name.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
Sharita
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