Edelman's SPI COMPREHENSIVE TEST BANK FINAL EXAM QUESTIONS 2026/2027 COMPLETE & ACCURATE EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS WITH DETAILED RATIONALES (100% CORRECT VERIFIED ANSWERS) CURRENTLY UPDATED VERSION 2026 EDITION |GUARAN

Edelman's SPI COMPREHENSIVE TEST BANK FINAL EXAM
QUESTIONS 2026/2027 COMPLETE & ACCURATE EXAM
QUESTIONS AND CORRECT VERIFIED ANSWERS WITH
DETAILED RATIONALES (100% CORRECT VERIFIED
ANSWERS) CURRENTLY UPDATED VERSION 2026 EDITION
|GUARANTEED PASS A+ |FULL REVISED EXAM




AMPLITUDE, POWER, & INTENSITY; The power of an ultrasound
wave can be reported with which of the following units? (More than
one answer may be correct.)
A. watts/square centimeter
B. dB/cm
C. watts
D. kg/cm^2


watts;
The units of power are watts. This is the
same measure of power as for light bulbs,
stereo systems, and curling irons.


AMPLITUDE, POWER, & INTENSITY; T/F: With standard diagnostic
imaging instrumentation, the sonographer has the ability to vary the
amplitude of a sound wave produced by the transducer.


True. The sonographer can adjust the strength of the ultrasound
signal that a transducer creates. When a sonographer increases the
output power, the electrical voltage sent to the transducer is
increased. This produces a more violent vibration of the
piezoelectric crystal within the transducer and, in turn, a stronger
ultrasound wave.

,AMPLITUDE, POWER, & INTENSITY; Typically, as an ultrasound wave
travels through soft tissue, the power of the wave:
A. decreases
B. increases
C. remains the same


decreases;
As a sound wave travels through the body, its power diminishes. This
process is called attenuation. Amplitude and power are both
measures of the strength of an acoustic wave, and tend to decrease
as sound travels.


AMPLITUDE, POWER, & INTENSITY; Mathematically, when a number
is squared, the number is multiplied by:
A. 2
B. 0.5
C. itself
D. 1.5


itself;
To square a number means to multiply the
number by itself. Hence, the term "five
squared" means 5 times 5, or 25. Ten squared is 10 times 10, or 100.

,AMPLITUDE, POWER, & INTENSITY; The final amplitude of an
acoustic wave is reduced to one-half of its original value. The final
power is
the original power.
A. the same as
B. one-half
C. double
D. none of the above


none of the above;
Changes in the power of a wave are
proportional to changes in the wave's amplitude squared. One-half
squared equals one-quarter (1/2 x 1/2 = 1/4). When one-half of the
wave's original amplitude remains, then only one-fourth of the
original power remains.


AMPLITUDE, POWER, & INTENSITY; The amplitude of an acoustic
wave decreases from 27 pascals to 9 pascals. If the initial power in
the wave was 27 watts, what is the wave's final power?
A. 3 watts
B. 9 watts
C. 1 watt
D. none of the above


3 watts;
Alterations in a wave's power are
proportional to changes in its amplitude squared. The power is
reduced to one-third of its previous value (from 27 to 9 pascals).
One-third squared equals one-ninth. Thus, only one-ninth of the
wave's original power remains. The initial power in the wave was 27
watts, one-ninth of that is 27/9, or 3 watts.

, AMPLITUDE, POWER, & INTENSITY; The intensity of an ultrasound
beam is defined as the _____ in a beam _______ by the _____ of the beam.
A. power, multiplied, diameter
B. amplitude, divided, area
C. power, divided, area
D. amplitude, multiplied,
circumference


amplitude, divided, area;
The intensity of an ultrasound beam is the concentration of the
power within the beam area. It is calculated by dividing the power in
a beam by its area. The units of intensity are watts per centimeter
squared, w/cm^2.


AMPLITUDE, POWER, & INTENSITY; As sound travels in the body,
what typically happens to the intensity of the wave?
A. increases
B. decreases
C. remains the same


decreases;
The intensity of a sound beam decreases as it travels through the
body because of attenuation. Amplitude, power, and intensity are
three different ways to measure the strength of an ultrasound beam.
They all decrease as sound propagates.