DMS 100 Quiz 1 2026 – Introduction to Diagnostic Medical Sonography
Fundamentals Practice Guide
A-mode - correct answer ✔✔ A one-dimensional representation of a reflected sound wave in a
diagnostic scan. Also called Amplitude Modulation.
Analog Scan Converter - correct answer ✔✔ A device in which data are represented by
continuously variable, measurable, physical quantities such as length, width, voltage, or
pressure.
B-mode - correct answer ✔✔ A two-dimensional presentation of echo-producing interfaces.
Also known as Brightness Modulation.
Bi-stable - correct answer ✔✔ An electrical device or circuit that has two stable states at any
given time so it is possible to switch between them.
Cavitation - correct answer ✔✔ The formation of cavities in a body tissue or organ due to the
sudden formation and collapse of low-pressure bubbles by means of mechanical forces.
Digital Scan Converter - correct answer ✔✔ A device that allows storage of echo information in
a digital format so that the information can be processed and displayed in varying shades of
gray.
Doppler Effect - correct answer ✔✔ Changes in the observed frequency of a wave occurring
when the source and observer are in motion relative to each other. Frequency increases as the
source and observer approach each other and decreases as they move apart.
Gray Scale - correct answer ✔✔ A series of shades from white to black. The more shades or
levels, the more realistically an image can be recorded and displayed, especially a scanned
photograph
, Harmonic Imaging - correct answer ✔✔ A quantitative method of characterizing and
recognizing various tissue types, beyond what is visually possible from source images.
M-mode - correct answer ✔✔ Presentation of temporal changes in echoes, in which the depth
of echo-producing interfaces is displayed along one axis, and time is displayed along a second
axis. Also known as Motion Modulation or Time-Motion Mode.
Piezoelectric Effect - correct answer ✔✔ The property of certain crystals that causes them to
produce voltage when a mechanical pressure, such as sound vibrations, is applied to them.
Real-Time Imaging - correct answer ✔✔ The production of images by automated scanners with
sufficient speed to visualize and record moving structures as well as stationary echo reflectors
Therapeutic Ultrasound - correct answer ✔✔ Sound waves at controlled high-level doses that
are used to selectively break down diseased or damaged tissues
3-D Imaging - correct answer ✔✔ Images produced through a volume, rather than a single
angle approach
4-D Imaging - correct answer ✔✔ An added dimension to 3-D imaging that captures numerous
images in rapid succession, creating a motion video of the target.
Ultrasound - correct answer ✔✔ Sound with frequencies above the upper limits of the human
ear (2 MHz to 20 MHz).
Da Vinci - correct answer ✔✔ Historian dealing with the physical properties of sound. (Sound
propagation). Originated the idea that sound travels in waves. Angle of incidence equals angle
of reflection.
Fundamentals Practice Guide
A-mode - correct answer ✔✔ A one-dimensional representation of a reflected sound wave in a
diagnostic scan. Also called Amplitude Modulation.
Analog Scan Converter - correct answer ✔✔ A device in which data are represented by
continuously variable, measurable, physical quantities such as length, width, voltage, or
pressure.
B-mode - correct answer ✔✔ A two-dimensional presentation of echo-producing interfaces.
Also known as Brightness Modulation.
Bi-stable - correct answer ✔✔ An electrical device or circuit that has two stable states at any
given time so it is possible to switch between them.
Cavitation - correct answer ✔✔ The formation of cavities in a body tissue or organ due to the
sudden formation and collapse of low-pressure bubbles by means of mechanical forces.
Digital Scan Converter - correct answer ✔✔ A device that allows storage of echo information in
a digital format so that the information can be processed and displayed in varying shades of
gray.
Doppler Effect - correct answer ✔✔ Changes in the observed frequency of a wave occurring
when the source and observer are in motion relative to each other. Frequency increases as the
source and observer approach each other and decreases as they move apart.
Gray Scale - correct answer ✔✔ A series of shades from white to black. The more shades or
levels, the more realistically an image can be recorded and displayed, especially a scanned
photograph
, Harmonic Imaging - correct answer ✔✔ A quantitative method of characterizing and
recognizing various tissue types, beyond what is visually possible from source images.
M-mode - correct answer ✔✔ Presentation of temporal changes in echoes, in which the depth
of echo-producing interfaces is displayed along one axis, and time is displayed along a second
axis. Also known as Motion Modulation or Time-Motion Mode.
Piezoelectric Effect - correct answer ✔✔ The property of certain crystals that causes them to
produce voltage when a mechanical pressure, such as sound vibrations, is applied to them.
Real-Time Imaging - correct answer ✔✔ The production of images by automated scanners with
sufficient speed to visualize and record moving structures as well as stationary echo reflectors
Therapeutic Ultrasound - correct answer ✔✔ Sound waves at controlled high-level doses that
are used to selectively break down diseased or damaged tissues
3-D Imaging - correct answer ✔✔ Images produced through a volume, rather than a single
angle approach
4-D Imaging - correct answer ✔✔ An added dimension to 3-D imaging that captures numerous
images in rapid succession, creating a motion video of the target.
Ultrasound - correct answer ✔✔ Sound with frequencies above the upper limits of the human
ear (2 MHz to 20 MHz).
Da Vinci - correct answer ✔✔ Historian dealing with the physical properties of sound. (Sound
propagation). Originated the idea that sound travels in waves. Angle of incidence equals angle
of reflection.
