ARDMS- SPI
_____ frequency transducers normally have the exceptional range decision. - ANS-high
______ frequency transducers have the exceptional variety decision. - ANS-excessive
frequency
________ common depth is averaged during the PRP (each the "on" and "off" times) -
ANS-Temporal
________ average depth is averaged only during the pulse duration ("on" time). - ANS-Pulse
____________ is the time from the begin of a pulse to the stop of that pulse. - ANS-Pulse length
____________ is the time from the start of a pulse to the begin of the subsequent pulse. -
ANS-Pulse Repetition Period
-10 dB way that the depth is reduced to ______ of its unique price. - ANS-One-10th
"Decrease by way of a element" manner - ANS-To divide via that wide variety
"Increase via a aspect" method - ANS-To multiply through that variety
1 cycle/2d = - ANS-1 Hertz
10^-6 - ANS-Prefix: micro
Symbol: μ
Meaning: millionth
10^-9 - ANS-Prefix: nano
Symbol: n
Meaning: billionth
10⌃-1 - ANS-Prefix: deci
Symbol: d
Meaning: tenth
10⌃-2 - ANS-Prefix: centi
Symbol: c
Meaning: hundredth
,10⌃-3 - ANS-Prefix: milli
Symbol: m
Meaning: thousandth
10⌃1 - ANS-Prefix: deca
Symbol: da
Meaning: ten
10⌃2 - ANS-Prefix: hecto
Symbol: h
Meaning: hundred
10⌃3 - ANS-Prefix: kilo
Symbol: k
Meaning: thousand
10⌃6 - ANS-Prefix: mega
Symbol: M
Meaning: million
10⌃9 - ANS-Prefix: giga
Symbol: G
Meaning: billion
A longer pulse has a ______ Q-aspect. - ANS-higher
A number in medical notation form with a terrible exponent has a fee - ANS-Less than 1
A number in scientific notation form with a nice exponent has a value - ANS-Greater than 10
A number in scientific notation shape with an exponent of zero has a fee - ANS-Between 1 and
10
A pair of 6 MHz probes are identical besides for lively detail diameter, that is 6 mm and 10 mm,
respectively. Which beam can be more compact in the a long way subject? - ANS-10mm lively
detail has a much less divergent beam. (large diameter crystals produce beams that diverge
less within the far subject)
A pair of 6 MHz probes are equal besides for active element diameter. The energetic element
diameters are 6mm and 10mm, respectively. The sound beam of which probe may have a
shallower consciousness? - ANS-6mm lively detail. Smaller diameter crystals produce beams
with shallower foci.
,A pair of 9 mm diameter probes are identical except for frequency, which might be 3 MHz and 6
MHz. Which sound beam will spread out extra in the a ways field? - ANS-three MHz beam is
more divergent. (beams are more compact as frequency increases)
A pair of nine mm diameter probes are identical except for frequency, that's three MHz and six
MHz, respectively. Which beam can have a shallower attention? - ANS-three MHz beam. (focal
intensity increases with growing frequency)
A pulse of ultrasound is propagating in smooth tissue, inclusive of liver. The pulse moves a
boundary with a different smooth tissue at normal occurrence. What part of the depth is
contemplated back closer to the transducer? Why? - ANS-A very small percent of sound,
commonly much less than 1%, is reflected at a boundary between smooth tissues
Very little reflection takes place whilst the impedances have comparable, however not identical,
values
A pulse of ultrasound propagates in tender tissue, including liver. The pulse strikes a gentle
tissue - gentle tissue interface with indirect occurrence. Some of the sound strength is
transmitted. To what volume is the transmitted beam refracted? - ANS-The transmitted beam
undergoes little to no refraction. A transmitted beam is refracted when the incidence is indirect
and the propagation speeds are exceptional.
A pulsed-wave transducer has a resonant frequency of five MHz. The lowest frequency within
the pulse is 2 MHz and the very best is eight MHz. What is the bandwidth? - ANS-8 MHz - 2
MHz = 6 MHz
A reduction in the intensity of a sound beam to at least one-half of of its unique price is _____
dB. - ANS--3 dB
A reduction inside the depth of a sound beam to 1-region of its original price is _____ dB. -
ANS--6 dB
A shorter pulse has a _________ Q-element. - ANS-decrease
A sound beam travels a total of 10 cm in 2 seconds. What is the speed of the sound? - ANS-five
cm/sec
A sound wave is created by means of a transducer, reflects off an object, and returns to that
transducer. The intensity of the reflector is 10 cm in soft tissue. What is the go-return time? -
ANS-a hundred thirty μsec
A sound wave is created by means of a transducer, reflects off an object, and returns to the
transducer. The go-go back time is one hundred thirty μsec. What is the most PRF? -
ANS-7,seven-hundred Hz.
, A sound wave is created with the aid of a transducer, reflects off an item, and returns to the
transducer. The move-go back time is 26 μsec. What is the intensity of the reflector? - ANS-2
cm
A sound wave is created by means of a transducer, reflects off an item, and returns to the
transducer. The pass-go back time is 26 μsec. What is the overall distance that the pulse
traveled? - ANS-four cm
A sound wave is created via a transducer, displays off an object, and returns to the transducer.
The imaging depth is 10 cm in soft tissue. What is the maximum pulse repetition frequency? -
ANS-7.7 kHz
A sound wave is created by way of a transducer, reflects off an item, and returns to the
transducer. The maximum imaging depth is 7.7 cm. What is the PRF? - ANS-77,000/7.7 =
10,000 Hz
A sound wave moves a boundary at regular incidence. The impedances of the 2 media are
same. What percentage of the sound wave is refracted? - ANS-0%, refraction can't arise with
ordinary prevalence
A sound wave with depth of fifty W/cm^2 strikes a boundary and is totally reflected. What is the
depth mirrored image coefficient? - ANS-one hundred%
A sound wave with intensity of 50 W/cm^2 strikes a boundary and is totally contemplated. What
is the reflected intensity? - ANS-50 W/cm^2
A waves depth is two mW/cm^2. There is a exchange of +9 dB. What is the final intensity? -
ANS-sixteen Mw/cm^2
A-modes are correct in determining _______________. - ANS-the intensity of reflectors
Absorption is __________ related to frequency. - ANS-Directly
Acoustic impedance = ________ x _____________. - ANS-Impedance = density (kg/m^three) x
propagation speed (m/s)
Acoustic speckle is an artifact produced via what? - ANS-interference of tiny acoustic wavelets
Adjustable recognition structures are called ______________. - ANS-Phased array
Advantage of phased array systems is: - ANS-the availability of electronically managed,
adjustable focusing, which lets in the sonographer to match the beam's traits to the clinical
situations.
_____ frequency transducers normally have the exceptional range decision. - ANS-high
______ frequency transducers have the exceptional variety decision. - ANS-excessive
frequency
________ common depth is averaged during the PRP (each the "on" and "off" times) -
ANS-Temporal
________ average depth is averaged only during the pulse duration ("on" time). - ANS-Pulse
____________ is the time from the begin of a pulse to the stop of that pulse. - ANS-Pulse length
____________ is the time from the start of a pulse to the begin of the subsequent pulse. -
ANS-Pulse Repetition Period
-10 dB way that the depth is reduced to ______ of its unique price. - ANS-One-10th
"Decrease by way of a element" manner - ANS-To divide via that wide variety
"Increase via a aspect" method - ANS-To multiply through that variety
1 cycle/2d = - ANS-1 Hertz
10^-6 - ANS-Prefix: micro
Symbol: μ
Meaning: millionth
10^-9 - ANS-Prefix: nano
Symbol: n
Meaning: billionth
10⌃-1 - ANS-Prefix: deci
Symbol: d
Meaning: tenth
10⌃-2 - ANS-Prefix: centi
Symbol: c
Meaning: hundredth
,10⌃-3 - ANS-Prefix: milli
Symbol: m
Meaning: thousandth
10⌃1 - ANS-Prefix: deca
Symbol: da
Meaning: ten
10⌃2 - ANS-Prefix: hecto
Symbol: h
Meaning: hundred
10⌃3 - ANS-Prefix: kilo
Symbol: k
Meaning: thousand
10⌃6 - ANS-Prefix: mega
Symbol: M
Meaning: million
10⌃9 - ANS-Prefix: giga
Symbol: G
Meaning: billion
A longer pulse has a ______ Q-aspect. - ANS-higher
A number in medical notation form with a terrible exponent has a fee - ANS-Less than 1
A number in scientific notation form with a nice exponent has a value - ANS-Greater than 10
A number in scientific notation shape with an exponent of zero has a fee - ANS-Between 1 and
10
A pair of 6 MHz probes are identical besides for lively detail diameter, that is 6 mm and 10 mm,
respectively. Which beam can be more compact in the a long way subject? - ANS-10mm lively
detail has a much less divergent beam. (large diameter crystals produce beams that diverge
less within the far subject)
A pair of 6 MHz probes are equal besides for active element diameter. The energetic element
diameters are 6mm and 10mm, respectively. The sound beam of which probe may have a
shallower consciousness? - ANS-6mm lively detail. Smaller diameter crystals produce beams
with shallower foci.
,A pair of 9 mm diameter probes are identical except for frequency, which might be 3 MHz and 6
MHz. Which sound beam will spread out extra in the a ways field? - ANS-three MHz beam is
more divergent. (beams are more compact as frequency increases)
A pair of nine mm diameter probes are identical except for frequency, that's three MHz and six
MHz, respectively. Which beam can have a shallower attention? - ANS-three MHz beam. (focal
intensity increases with growing frequency)
A pulse of ultrasound is propagating in smooth tissue, inclusive of liver. The pulse moves a
boundary with a different smooth tissue at normal occurrence. What part of the depth is
contemplated back closer to the transducer? Why? - ANS-A very small percent of sound,
commonly much less than 1%, is reflected at a boundary between smooth tissues
Very little reflection takes place whilst the impedances have comparable, however not identical,
values
A pulse of ultrasound propagates in tender tissue, including liver. The pulse strikes a gentle
tissue - gentle tissue interface with indirect occurrence. Some of the sound strength is
transmitted. To what volume is the transmitted beam refracted? - ANS-The transmitted beam
undergoes little to no refraction. A transmitted beam is refracted when the incidence is indirect
and the propagation speeds are exceptional.
A pulsed-wave transducer has a resonant frequency of five MHz. The lowest frequency within
the pulse is 2 MHz and the very best is eight MHz. What is the bandwidth? - ANS-8 MHz - 2
MHz = 6 MHz
A reduction in the intensity of a sound beam to at least one-half of of its unique price is _____
dB. - ANS--3 dB
A reduction inside the depth of a sound beam to 1-region of its original price is _____ dB. -
ANS--6 dB
A shorter pulse has a _________ Q-element. - ANS-decrease
A sound beam travels a total of 10 cm in 2 seconds. What is the speed of the sound? - ANS-five
cm/sec
A sound wave is created by means of a transducer, reflects off an object, and returns to that
transducer. The intensity of the reflector is 10 cm in soft tissue. What is the go-return time? -
ANS-a hundred thirty μsec
A sound wave is created by means of a transducer, reflects off an object, and returns to the
transducer. The go-go back time is one hundred thirty μsec. What is the most PRF? -
ANS-7,seven-hundred Hz.
, A sound wave is created with the aid of a transducer, reflects off an item, and returns to the
transducer. The move-go back time is 26 μsec. What is the intensity of the reflector? - ANS-2
cm
A sound wave is created by means of a transducer, reflects off an item, and returns to the
transducer. The pass-go back time is 26 μsec. What is the overall distance that the pulse
traveled? - ANS-four cm
A sound wave is created via a transducer, displays off an object, and returns to the transducer.
The imaging depth is 10 cm in soft tissue. What is the maximum pulse repetition frequency? -
ANS-7.7 kHz
A sound wave is created by way of a transducer, reflects off an item, and returns to the
transducer. The maximum imaging depth is 7.7 cm. What is the PRF? - ANS-77,000/7.7 =
10,000 Hz
A sound wave moves a boundary at regular incidence. The impedances of the 2 media are
same. What percentage of the sound wave is refracted? - ANS-0%, refraction can't arise with
ordinary prevalence
A sound wave with depth of fifty W/cm^2 strikes a boundary and is totally reflected. What is the
depth mirrored image coefficient? - ANS-one hundred%
A sound wave with intensity of 50 W/cm^2 strikes a boundary and is totally contemplated. What
is the reflected intensity? - ANS-50 W/cm^2
A waves depth is two mW/cm^2. There is a exchange of +9 dB. What is the final intensity? -
ANS-sixteen Mw/cm^2
A-modes are correct in determining _______________. - ANS-the intensity of reflectors
Absorption is __________ related to frequency. - ANS-Directly
Acoustic impedance = ________ x _____________. - ANS-Impedance = density (kg/m^three) x
propagation speed (m/s)
Acoustic speckle is an artifact produced via what? - ANS-interference of tiny acoustic wavelets
Adjustable recognition structures are called ______________. - ANS-Phased array
Advantage of phased array systems is: - ANS-the availability of electronically managed,
adjustable focusing, which lets in the sonographer to match the beam's traits to the clinical
situations.
