DMS 101 Exam 3 2026 – Diagnostic Medical Sonography Fundamentals and
Imaging Study Guide
A sweeping beam of sound through the tissues - correct answer ✔✔ In order to have real time
scanning we must be able to create what?
How the probe is constructed and how it pulses - correct answer ✔✔ How we create this
sweeping motion is determined by what? (2)
B Scans - correct answer ✔✔ An old school method where we had to drag the transducer over a
patients skin (your own arm motion) and then wait for an image to be created. Not a live scan,
just images
Single circular, disk-shaped element - correct answer ✔✔ Mechanical Scanning Transducer has
what kind of element?
Single - correct answer ✔✔ A mechanical scanning transducer has (a single, or multiple) point(s)
of origin?
Sector (pie) - correct answer ✔✔ What is the shape of the image that is produced by a
mechanical scanner?
higher likely hood of repairs - correct answer ✔✔ What was a con of mechanical scanners?
allowed air to enter the transducer which effected sound transmission - correct answer ✔✔
What was wrong with the mechanical transducer leaking?
High likelihood of repairs - correct answer ✔✔ Why aren't mechanical transducers used in
today's clinical setting?
,Array - correct answer ✔✔ What's another name for electronic scanning?
Electronic scanning - correct answer ✔✔ What is the modern day scanning method?
eliminate the use of mechanical probes that had moving parts - correct answer ✔✔ What was
the reason electronic scanning was invented?
Electronically - correct answer ✔✔ How is an array beam scanned through the tissue?
which crystal receives the echo, beam direction, echo arrival time, and speed of sound in the
medium - correct answer ✔✔ Position (x,y) of the reflector is determined by: (4)
time and speed of sound in the medium - correct answer ✔✔ What is depth determined by?
Strength of the returning echo amplitude - correct answer ✔✔ What is the level of brightness
given to an echo determined by?
A grouping or arrangement of parts forming a complete unit - correct answer ✔✔ What is an
array?
A transducer assembly with more than one element - correct answer ✔✔ What is a transducer
array?
It's own electronic circuit - correct answer ✔✔ What does each element have?
Channels - correct answer ✔✔ The number of elements that are electrically independent and
active in both transmitting and receiving is often referred to as what?
, 120-250 - correct answer ✔✔ About how many elements are in each array transducer?
mechanical motion of transducer parts - correct answer ✔✔ Arrays allow for electronic beam
steering with no what?
Focusing and beam forming - correct answer ✔✔ Arrays enable electronic (dynamic) what? (2)
Annular - correct answer ✔✔ ring shaped elements, arranged in concentric circles
Annular - correct answer ✔✔ What type of array might be used for high intensity focused
ultrasound (HIFU) to treat tumors?
Linear - correct answer ✔✔ What transducer has it's elements arranged in a line? Used for
small parts, venous, appendix
Convex (curved) - correct answer ✔✔ What transducer had it's elements in a curved line?
Annular - correct answer ✔✔ What type of array is the only mechanically steered array?
outward-inward (because of concentric circles) - correct answer ✔✔ How do annular arrays
fire?
Section thickness artifact - correct answer ✔✔ Annular arrays reduce what kind of artifact?
Dual-plane electronic focusing - correct answer ✔✔ What is the major advantage of annular
arrays?
Imaging Study Guide
A sweeping beam of sound through the tissues - correct answer ✔✔ In order to have real time
scanning we must be able to create what?
How the probe is constructed and how it pulses - correct answer ✔✔ How we create this
sweeping motion is determined by what? (2)
B Scans - correct answer ✔✔ An old school method where we had to drag the transducer over a
patients skin (your own arm motion) and then wait for an image to be created. Not a live scan,
just images
Single circular, disk-shaped element - correct answer ✔✔ Mechanical Scanning Transducer has
what kind of element?
Single - correct answer ✔✔ A mechanical scanning transducer has (a single, or multiple) point(s)
of origin?
Sector (pie) - correct answer ✔✔ What is the shape of the image that is produced by a
mechanical scanner?
higher likely hood of repairs - correct answer ✔✔ What was a con of mechanical scanners?
allowed air to enter the transducer which effected sound transmission - correct answer ✔✔
What was wrong with the mechanical transducer leaking?
High likelihood of repairs - correct answer ✔✔ Why aren't mechanical transducers used in
today's clinical setting?
,Array - correct answer ✔✔ What's another name for electronic scanning?
Electronic scanning - correct answer ✔✔ What is the modern day scanning method?
eliminate the use of mechanical probes that had moving parts - correct answer ✔✔ What was
the reason electronic scanning was invented?
Electronically - correct answer ✔✔ How is an array beam scanned through the tissue?
which crystal receives the echo, beam direction, echo arrival time, and speed of sound in the
medium - correct answer ✔✔ Position (x,y) of the reflector is determined by: (4)
time and speed of sound in the medium - correct answer ✔✔ What is depth determined by?
Strength of the returning echo amplitude - correct answer ✔✔ What is the level of brightness
given to an echo determined by?
A grouping or arrangement of parts forming a complete unit - correct answer ✔✔ What is an
array?
A transducer assembly with more than one element - correct answer ✔✔ What is a transducer
array?
It's own electronic circuit - correct answer ✔✔ What does each element have?
Channels - correct answer ✔✔ The number of elements that are electrically independent and
active in both transmitting and receiving is often referred to as what?
, 120-250 - correct answer ✔✔ About how many elements are in each array transducer?
mechanical motion of transducer parts - correct answer ✔✔ Arrays allow for electronic beam
steering with no what?
Focusing and beam forming - correct answer ✔✔ Arrays enable electronic (dynamic) what? (2)
Annular - correct answer ✔✔ ring shaped elements, arranged in concentric circles
Annular - correct answer ✔✔ What type of array might be used for high intensity focused
ultrasound (HIFU) to treat tumors?
Linear - correct answer ✔✔ What transducer has it's elements arranged in a line? Used for
small parts, venous, appendix
Convex (curved) - correct answer ✔✔ What transducer had it's elements in a curved line?
Annular - correct answer ✔✔ What type of array is the only mechanically steered array?
outward-inward (because of concentric circles) - correct answer ✔✔ How do annular arrays
fire?
Section thickness artifact - correct answer ✔✔ Annular arrays reduce what kind of artifact?
Dual-plane electronic focusing - correct answer ✔✔ What is the major advantage of annular
arrays?
