Exam (elaborations)
ARDMS SPI TEST QUESTIONS WITH VERIFIED ANSWERS ALREADY GRADED A+
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ARDMS SPI TEST QUESTIONS WITH VERIFIED ANSWERS ALREADY GRADED A+
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Name: Score:97 Multiple choice questions
Term
What is another name for the beam uniformity coefficient?
Spatial distribution of acoustic energy
logarithmic
SP/SA factor
Frequency1 of 97
Term
Changes in power of a wave are proportional to the waves amplitude squared. When ½ of the
waves orginanal amplitude remains, only ___ of the original power remains
¼
Bioeffects
2,000,000 to 10,000,000 Hz or 2-10 megahertz
longer2 of 97
Term
What is the value of the duty factor in contiuous wave ultrasound?
1.0 or 100%
SP/SA factor
Gas, liquid, solid
2,000,000 to 10,000,000 Hz or 2-10 megahertz3 of 97 Term
sound waves are ______ waves
source and medium
inversely
output power
longitudinal4 of 97
Term
When a number is squared it is multiplied by?
unitless
X-axis
Itself
inversely5 of 97
Term
The speed of the media is based on the ___ and ___ of the media
SAPA and SATA
Attenuation coefficient
density and stiffiness
Constructive interference6 of 97
Term
The term Im defines the ___ and has units of ____
maximum intensity, watts/cm2
greater than 0.02 MHz or 20,000 Hz
Spatial distribution of acoustic energy
Mechanical, longitudinal7 of 97 Term
As power increases, the ____ also increases
intensity
watts
inversely
unrelated8 of 97
Term
What is the metric system order from highest to lowest?
A series of compressions and refractions
Giga,mega,kilo,hector,deca,deci,centi,milli,micro,nano
M,k,da,d,Mega,kilo, deca,deci,centi
Mechanical, longitudinal9 of 97
Term
What is the name of the horizontal axis of a graph?
1.0 or 100%
X-axis
24 kHz
decreases10 of 97
Term
In pulsed ultrasound what is the maximum value of the duty factor?
pulse duration
1.0 or 100%
density and stiffiness
Less than 100%11 of 97 Term
The half value layer is the thickness of tissue where sound attenuates by ____dB
greater than
0.1-0.5 microseconds
3
lesser12 of 97
Term
A sonographer adjusts the maximum imaging depth of the ultrasound system. Which also
changes?
Prp and prg
Horizontal
frequency
intensity13 of 97
Term
what determines the period of an ultrasound wave?
number of cycles x period
time
Remains the same
The sound source14 of 97
Term
What is the vertical axis of the graph called?
decreases
24 kHz
Itself
Y-axis15 of 97
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