SPI EDELMAN CH. 4-6 QUESTIONS WITH VERIFIED
ACCURATE ANSWERS
If intensity reflection coefficient increases, intensity transmission coefficient ________.
Select one:
a.decreases
b.increases
c.remains unchanged
d.is equal to the intensity reflection coefficient - Answers -a.
decreases
Which of the following has the lowest intensity:
a.SPPA
b.SPTP
c.SATA
d.SPTA - Answers -c.SATA
The impedance of the matching layer is ________.
Select one:
a.an intermediate value between the transducer element and tissue
b.greater than the value between the transducer element and tissue
c.less than the value between the transducer element and tissue
d.equal to the impedance of tissue - Answers -a.an intermediate value between the
transducer element and tissue
The attenuation coefficient for soft tissue using a 10 MHz transducer is ________.
Select one:
a.5 dB/cm
b.5 dB/mm
c.10 dB/cm
d.10 dB/mm - Answers -a.5 dB/cm
The period times the number of cycles in a pulse is known as the
Select one:
pulse duration
continuous wave
pulse repetition period
pulse repetition frequency - Answers -pulse duration
Intensity is
Select one:
indirectly related to amplitude
directly related to the area
,indirectly related to the area
indirectly related to power - Answers -indirectly related to the area
______________ is the time from the beginning of a pulse to the beginning of the next
pulse.
Select one:
duty factor
pulse repetition frequency
pulse duration
pulse repetition period - Answers -pulse repetition period
The spatial pulse length is defined as the product of the number of —---------- in a pulse
multiplied by —--------.
a.Cycles, wavelength
b.frequency, velocity
c.cycles, frequency
d.frequency, wavelength - Answers -a.Cycles, wavelength
Intensity is proportional to amplitude squared.
TRUE
FALSE - Answers -TRUE
The pulse repetition frequency is the number of pulses that occur in a single ________.
Select one:
a.microsecond
b.second
c.millisecond
d.pulse - Answers -b.second
The proportion of intensity to amplitude is ________.
Select one:
a.tripled
b.halved
c.squared
d.quadrupled - Answers -c.
squared
The Intensity Reflection Coefficient refers to
Select one:
the reflected intensity plus the transmitted intensity
the percentage of ultrasound energy that is reflected back to the transducer
the percentage of ultrasound intensity that is transmitted through an interface
the strength of the ultrasound intensity that continues to propagate forward - Answers -
the percentage of ultrasound energy that is reflected back to the transducer
, Normal incidence occurs when the ultrasound beam travels _____to the boundary
between the two media.
a.Perpendicular
b.At 1540 m/s
c.Obliquely
d.Parallel - Answers -a.Perpendicular
The attenuation of a 5.0 MHz transducer at a depth of 4 cm is ________ dB.
Select one:
a.1.6
b.10
c.16
d.20 - Answers -b.
10
Pulsed ultrasound consists of ________ separated by ________ of time.
Select one:
a.frequencies; cycles
b.pulses; cycles
c.pulses; gaps
Pulsed ultrasound consists of pulses separated by gaps of time.
d.cycles; pulses - Answers -c.
pulses; gaps
At what depth does a 3.0 MHz transducer have an attenuation of 9 dB?
Select one:
a.6.0 mm
b.0.6 cm
c.6.0 cm
d.0.6 mm - Answers -c.6.0 cm
The angle at which an ultrasound beam is bent as it passes through a boundary
between two different materials is described mathematically by:
a.Doppler's law
b.Huygen's principle
c.Snell's law
d.Curie's principle - Answers -c.
Snell's law
The attenuation of a 5 MHz transducer in soft tissue would be ________ dB at 2 cm of
depth.
Select one:
a.20
b.5
c.10
d.1.25 - Answers -b.
ACCURATE ANSWERS
If intensity reflection coefficient increases, intensity transmission coefficient ________.
Select one:
a.decreases
b.increases
c.remains unchanged
d.is equal to the intensity reflection coefficient - Answers -a.
decreases
Which of the following has the lowest intensity:
a.SPPA
b.SPTP
c.SATA
d.SPTA - Answers -c.SATA
The impedance of the matching layer is ________.
Select one:
a.an intermediate value between the transducer element and tissue
b.greater than the value between the transducer element and tissue
c.less than the value between the transducer element and tissue
d.equal to the impedance of tissue - Answers -a.an intermediate value between the
transducer element and tissue
The attenuation coefficient for soft tissue using a 10 MHz transducer is ________.
Select one:
a.5 dB/cm
b.5 dB/mm
c.10 dB/cm
d.10 dB/mm - Answers -a.5 dB/cm
The period times the number of cycles in a pulse is known as the
Select one:
pulse duration
continuous wave
pulse repetition period
pulse repetition frequency - Answers -pulse duration
Intensity is
Select one:
indirectly related to amplitude
directly related to the area
,indirectly related to the area
indirectly related to power - Answers -indirectly related to the area
______________ is the time from the beginning of a pulse to the beginning of the next
pulse.
Select one:
duty factor
pulse repetition frequency
pulse duration
pulse repetition period - Answers -pulse repetition period
The spatial pulse length is defined as the product of the number of —---------- in a pulse
multiplied by —--------.
a.Cycles, wavelength
b.frequency, velocity
c.cycles, frequency
d.frequency, wavelength - Answers -a.Cycles, wavelength
Intensity is proportional to amplitude squared.
TRUE
FALSE - Answers -TRUE
The pulse repetition frequency is the number of pulses that occur in a single ________.
Select one:
a.microsecond
b.second
c.millisecond
d.pulse - Answers -b.second
The proportion of intensity to amplitude is ________.
Select one:
a.tripled
b.halved
c.squared
d.quadrupled - Answers -c.
squared
The Intensity Reflection Coefficient refers to
Select one:
the reflected intensity plus the transmitted intensity
the percentage of ultrasound energy that is reflected back to the transducer
the percentage of ultrasound intensity that is transmitted through an interface
the strength of the ultrasound intensity that continues to propagate forward - Answers -
the percentage of ultrasound energy that is reflected back to the transducer
, Normal incidence occurs when the ultrasound beam travels _____to the boundary
between the two media.
a.Perpendicular
b.At 1540 m/s
c.Obliquely
d.Parallel - Answers -a.Perpendicular
The attenuation of a 5.0 MHz transducer at a depth of 4 cm is ________ dB.
Select one:
a.1.6
b.10
c.16
d.20 - Answers -b.
10
Pulsed ultrasound consists of ________ separated by ________ of time.
Select one:
a.frequencies; cycles
b.pulses; cycles
c.pulses; gaps
Pulsed ultrasound consists of pulses separated by gaps of time.
d.cycles; pulses - Answers -c.
pulses; gaps
At what depth does a 3.0 MHz transducer have an attenuation of 9 dB?
Select one:
a.6.0 mm
b.0.6 cm
c.6.0 cm
d.0.6 mm - Answers -c.6.0 cm
The angle at which an ultrasound beam is bent as it passes through a boundary
between two different materials is described mathematically by:
a.Doppler's law
b.Huygen's principle
c.Snell's law
d.Curie's principle - Answers -c.
Snell's law
The attenuation of a 5 MHz transducer in soft tissue would be ________ dB at 2 cm of
depth.
Select one:
a.20
b.5
c.10
d.1.25 - Answers -b.
