ARDMS- SPI
_____ frequency transducers commonly have the satisfactory variety decision. - ANS-high
______ frequency transducers have the first-rate range decision. - ANS-excessive frequency
________ average intensity is averaged at some stage in the PRP (both the "on" and "off"
times) - ANS-Temporal
________ common intensity is averaged handiest at some stage in the heartbeat period ("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 start of the next pulse. - ANS-Pulse
Repetition Period
-10 dB means that the depth is reduced to ______ of its original cost. - ANS-One-10th
"Decrease through a issue" approach - ANS-To divide by means of that variety
"Increase by a component" manner - ANS-To multiply by way of that number
1 cycle/2nd = - ANS-1 Hertz
10^-6 - ANS-Prefix: micro
Symbol: μ
Meaning: millionth
10^-nine - ANS-Prefix: nano
Symbol: n
Meaning: billionth
10⌃-1 - ANS-Prefix: deci
Symbol: d
Meaning: 10th
10⌃-2 - ANS-Prefix: centi
Symbol: c
Meaning: hundredth
10⌃-three - 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: okay
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-issue. - ANS-better
A quantity in scientific notation shape with a poor exponent has a fee - ANS-Less than 1
A wide variety in scientific notation form with a fantastic exponent has a fee - ANS-Greater than
10
A quantity in scientific notation shape with an exponent of 0 has a cost - ANS-Between 1 and 10
A pair of 6 MHz probes are equal except for active detail diameter, that's 6 mm and 10 mm,
respectively. Which beam could be greater compact inside the a long way discipline? -
ANS-10mm energetic element has a less divergent beam. (larger diameter crystals produce
beams that diverge less in the far subject)
A pair of 6 MHz probes are same besides for active detail diameter. The active detail diameters
are 6mm and 10mm, respectively. The sound beam of which probe will have a shallower
recognition? - ANS-6mm lively detail. Smaller diameter crystals produce beams with shallower
foci.
A pair of 9 mm diameter probes are equal besides for frequency, which are three MHz and six
MHz. Which sound beam will spread out extra inside the far subject? - ANS-3 MHz beam is
extra divergent. (beams are more compact as frequency increases)
A pair of 9 mm diameter probes are identical besides for frequency, that's 3 MHz and six MHz,
respectively. Which beam could have a shallower attention? - ANS-three MHz beam. (focal
depth increases with increasing frequency)
A pulse of ultrasound is propagating in smooth tissue, together with liver. The pulse strikes a
boundary with a exclusive gentle tissue at everyday prevalence. What portion of the intensity is
pondered back toward the transducer? Why? - ANS-A very small percentage of sound, normally
less than 1%, is meditated at a boundary between soft tissues
Very little mirrored image takes place whilst the impedances have similar, however no longer
identical, values
A pulse of ultrasound propagates in soft tissue, along with liver. The pulse moves a gentle tissue
- smooth tissue interface with indirect prevalence. Some of the sound electricity is transmitted.
To what volume is the transmitted beam refracted? - ANS-The transmitted beam undergoes little
to no refraction. A transmitted beam is refracted whilst the occurrence is oblique and the
propagation speeds are exclusive.
A pulsed-wave transducer has a resonant frequency of five MHz. The lowest frequency within
the pulse is 2 MHz and the highest is eight MHz. What is the bandwidth? - ANS-8 MHz - 2 MHz
= 6 MHz
A reduction inside the depth of a legitimate beam to at least one-half of its original price is
_____ dB. - ANS--three dB
A discount in the depth of a legitimate beam to at least one-region of its authentic value is
_____ dB. - ANS--6 dB
A shorter pulse has a _________ Q-element. - ANS-lower
, A sound beam travels a total of 10 cm in 2 seconds. What is the velocity of the sound? -
ANS-five cm/sec
A sound wave is created by means of a transducer, displays off an object, and returns to that
transducer. The depth of the reflector is 10 cm in tender tissue. What is the cross-return time? -
ANS-one hundred thirty μsec
A sound wave is created via a transducer, reflects off an object, and returns to the transducer.
The go-return time is a hundred thirty μsec. What is the most PRF? - ANS-7,seven hundred Hz.
A sound wave is created by means of a transducer, displays off an item, and returns to the
transducer. The move-return time is 26 μsec. What is the depth of the reflector? - ANS-2 cm
A sound wave is created by using a transducer, displays off an item, and returns to the
transducer. The cross-return time is 26 μsec. What is the entire distance that the pulse traveled?
- ANS-four cm
A sound wave is created by means of a transducer, reflects off an item, and returns to the
transducer. The imaging depth is 10 cm in tender tissue. What is the maximum pulse repetition
frequency? - ANS-7.7 kHz
A sound wave is created by using a transducer, reflects off an object, and returns to the
transducer. The maximum imaging intensity is 7.7 cm. What is the PRF? - ANS-seventy
seven,000/7.7 = 10,000 Hz
A sound wave strikes a boundary at normal occurrence. The impedances of the two media are
same. What percent of the sound wave is refracted? - ANS-0%, refraction can not occur with
regular prevalence
A sound wave with depth of fifty W/cm^2 strikes a boundary and is completely meditated. What
is the depth mirrored image coefficient? - ANS-a hundred%
A sound wave with intensity of fifty W/cm^2 moves a boundary and is definitely reflected. What
is the meditated depth? - ANS-50 W/cm^2
A waves depth is 2 mW/cm^2. There is a alternate of +9 dB. What is the final intensity? -
ANS-16 Mw/cm^2
A-modes are accurate in figuring out _______________. - ANS-the depth of reflectors
Absorption is __________ related to frequency. - ANS-Directly
Acoustic impedance = ________ x _____________. - ANS-Impedance = density (kg/m^three) x
propagation velocity (m/s)
Acoustic speckle is an artifact produced with the aid of what? - ANS-interference of tiny acoustic
wavelets
Adjustable consciousness systems are known as ______________. - ANS-Phased array
Advantage of phased array systems is: - ANS-the supply of electronically managed, adjustable
focusing, which lets in the sonographer to healthy the beam's characteristics to the clinical
occasions.
After a valid wave is acquired through the transducer, transformed into power and lower back to
the ultrasound gadget, it's miles reinforced or __________. - ANS-Amplifide
Air (lung) and Bone have extraordinarily ________ attenuation compared to sift tissue. -
ANS-High
All angles that don't equal 90 tiers are called _________ angles. - ANS-Oblique
All intensities have units of __________. - ANS-W/cm^2
All waves deliver _____ from one place to another. - ANS-Energy
_____ frequency transducers commonly have the satisfactory variety decision. - ANS-high
______ frequency transducers have the first-rate range decision. - ANS-excessive frequency
________ average intensity is averaged at some stage in the PRP (both the "on" and "off"
times) - ANS-Temporal
________ common intensity is averaged handiest at some stage in the heartbeat period ("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 start of the next pulse. - ANS-Pulse
Repetition Period
-10 dB means that the depth is reduced to ______ of its original cost. - ANS-One-10th
"Decrease through a issue" approach - ANS-To divide by means of that variety
"Increase by a component" manner - ANS-To multiply by way of that number
1 cycle/2nd = - ANS-1 Hertz
10^-6 - ANS-Prefix: micro
Symbol: μ
Meaning: millionth
10^-nine - ANS-Prefix: nano
Symbol: n
Meaning: billionth
10⌃-1 - ANS-Prefix: deci
Symbol: d
Meaning: 10th
10⌃-2 - ANS-Prefix: centi
Symbol: c
Meaning: hundredth
10⌃-three - 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: okay
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-issue. - ANS-better
A quantity in scientific notation shape with a poor exponent has a fee - ANS-Less than 1
A wide variety in scientific notation form with a fantastic exponent has a fee - ANS-Greater than
10
A quantity in scientific notation shape with an exponent of 0 has a cost - ANS-Between 1 and 10
A pair of 6 MHz probes are equal except for active detail diameter, that's 6 mm and 10 mm,
respectively. Which beam could be greater compact inside the a long way discipline? -
ANS-10mm energetic element has a less divergent beam. (larger diameter crystals produce
beams that diverge less in the far subject)
A pair of 6 MHz probes are same besides for active detail diameter. The active detail diameters
are 6mm and 10mm, respectively. The sound beam of which probe will have a shallower
recognition? - ANS-6mm lively detail. Smaller diameter crystals produce beams with shallower
foci.
A pair of 9 mm diameter probes are equal besides for frequency, which are three MHz and six
MHz. Which sound beam will spread out extra inside the far subject? - ANS-3 MHz beam is
extra divergent. (beams are more compact as frequency increases)
A pair of 9 mm diameter probes are identical besides for frequency, that's 3 MHz and six MHz,
respectively. Which beam could have a shallower attention? - ANS-three MHz beam. (focal
depth increases with increasing frequency)
A pulse of ultrasound is propagating in smooth tissue, together with liver. The pulse strikes a
boundary with a exclusive gentle tissue at everyday prevalence. What portion of the intensity is
pondered back toward the transducer? Why? - ANS-A very small percentage of sound, normally
less than 1%, is meditated at a boundary between soft tissues
Very little mirrored image takes place whilst the impedances have similar, however no longer
identical, values
A pulse of ultrasound propagates in soft tissue, along with liver. The pulse moves a gentle tissue
- smooth tissue interface with indirect prevalence. Some of the sound electricity is transmitted.
To what volume is the transmitted beam refracted? - ANS-The transmitted beam undergoes little
to no refraction. A transmitted beam is refracted whilst the occurrence is oblique and the
propagation speeds are exclusive.
A pulsed-wave transducer has a resonant frequency of five MHz. The lowest frequency within
the pulse is 2 MHz and the highest is eight MHz. What is the bandwidth? - ANS-8 MHz - 2 MHz
= 6 MHz
A reduction inside the depth of a legitimate beam to at least one-half of its original price is
_____ dB. - ANS--three dB
A discount in the depth of a legitimate beam to at least one-region of its authentic value is
_____ dB. - ANS--6 dB
A shorter pulse has a _________ Q-element. - ANS-lower
, A sound beam travels a total of 10 cm in 2 seconds. What is the velocity of the sound? -
ANS-five cm/sec
A sound wave is created by means of a transducer, displays off an object, and returns to that
transducer. The depth of the reflector is 10 cm in tender tissue. What is the cross-return time? -
ANS-one hundred thirty μsec
A sound wave is created via a transducer, reflects off an object, and returns to the transducer.
The go-return time is a hundred thirty μsec. What is the most PRF? - ANS-7,seven hundred Hz.
A sound wave is created by means of a transducer, displays off an item, and returns to the
transducer. The move-return time is 26 μsec. What is the depth of the reflector? - ANS-2 cm
A sound wave is created by using a transducer, displays off an item, and returns to the
transducer. The cross-return time is 26 μsec. What is the entire distance that the pulse traveled?
- ANS-four cm
A sound wave is created by means of a transducer, reflects off an item, and returns to the
transducer. The imaging depth is 10 cm in tender tissue. What is the maximum pulse repetition
frequency? - ANS-7.7 kHz
A sound wave is created by using a transducer, reflects off an object, and returns to the
transducer. The maximum imaging intensity is 7.7 cm. What is the PRF? - ANS-seventy
seven,000/7.7 = 10,000 Hz
A sound wave strikes a boundary at normal occurrence. The impedances of the two media are
same. What percent of the sound wave is refracted? - ANS-0%, refraction can not occur with
regular prevalence
A sound wave with depth of fifty W/cm^2 strikes a boundary and is completely meditated. What
is the depth mirrored image coefficient? - ANS-a hundred%
A sound wave with intensity of fifty W/cm^2 moves a boundary and is definitely reflected. What
is the meditated depth? - ANS-50 W/cm^2
A waves depth is 2 mW/cm^2. There is a alternate of +9 dB. What is the final intensity? -
ANS-16 Mw/cm^2
A-modes are accurate in figuring out _______________. - ANS-the depth of reflectors
Absorption is __________ related to frequency. - ANS-Directly
Acoustic impedance = ________ x _____________. - ANS-Impedance = density (kg/m^three) x
propagation velocity (m/s)
Acoustic speckle is an artifact produced with the aid of what? - ANS-interference of tiny acoustic
wavelets
Adjustable consciousness systems are known as ______________. - ANS-Phased array
Advantage of phased array systems is: - ANS-the supply of electronically managed, adjustable
focusing, which lets in the sonographer to healthy the beam's characteristics to the clinical
occasions.
After a valid wave is acquired through the transducer, transformed into power and lower back to
the ultrasound gadget, it's miles reinforced or __________. - ANS-Amplifide
Air (lung) and Bone have extraordinarily ________ attenuation compared to sift tissue. -
ANS-High
All angles that don't equal 90 tiers are called _________ angles. - ANS-Oblique
All intensities have units of __________. - ANS-W/cm^2
All waves deliver _____ from one place to another. - ANS-Energy
