Imaging Transducer Basics quiz

1. Which part of the transducer comes in contact with the patient?

a.) Acoustic Window
b.) Strain Relief
c.) Footprint
d.) Matching Layer

You said:
c). Footprint

Correct!

Review the section on terminology.

See: Terminology

2. The range of frequencies contained within a pulse is called the ________________.

a.) Resolution
b.) Bandwidth
c.) Piezoelectric Property
d.) Element

You said:
b). Bandwidth

Correct!

Refer to the Bandwidth section under Transducer Construction.

See: Bandwidth

3. Which one of the transducers listed below is a hybrid transducer?

a.) Mechanical
b.) Annular
c.) Phased
d.) None of the above

You said:
b). Annular

Correct!

Review descriptions of transducer types, specifically annular and trapezoid transducers.

See: Transducer Types

4. Which one of the following converts energy from one form to another?

a.) Beamformer
b.) Lens
c.) Matching Layer
d.) Transducer

You said:
b). Lens

Incorrect!

Review the section on imaging transducers.

See: What is a transducer?

5. Identify the material used to stop the element from ringing.

a.) Matching Layer
b.) Damping Layer
c.) Lens
d.) Piezoelectric

You said:
b). Damping Layer

Correct!

Review 'Internal Components' under Transducer Construction.

See: Internal Components

6. What type of transducer is shown in the picture below?

a.) Phased
b.) Annular
c.) Linear
d.) Mechanical

You said:
c). Linear

Correct!

Review the section on transducer types.

See: Transducer Types

7. Which part of the transducer plugs into ports on the system?

a.) Connector
b.) Lens
c.) Strain Relief
d.) Housing

You said:
a). Connector

Correct!

Review the section on transducer construction.

See: Connector

8. Which one of the piezoelectric materials listed below is man-made?

a.) Quartz
b.) Rochelle Salts
c.) Lead Zirconate Titante (PZT)
d.) Tourmaline

You said:
c). Lead Zirconate Titante (PZT)

Correct!

Review piezoelectric materials.

See: Piezoelectric Materials

9. The element physically moves in which transducer?

a.) Linear Array
b.) Mechanical
c.) Vector
d.) Phased Array

You said:
b). Mechanical

Correct!

Review the section on transducer types.

See: Transducer Types

10. Identify the criteria that determine transducer selection.

a.) Patient Size
b.) Acoustic Window
c.) Field of View
d.) All of the above

You said:
d). All of the above

Correct!

Review the section on transducer selection.

See: Transducer Selection

11. Which transducer frequency offers the best resolution for superficial/small parts imaging?

a.) 8 MHz
b.) 12 MHz
c.) 10 MHz
d.) 7.5 MHz

You said:
b). 12 MHz

Correct!

Review the section on transducer construction, specifically frequency.

See: Frequency

12. Another name for the Near Field is the __________ Zone.

a.) Fresnel
b.) Fraunhofer
c.) Far
d.) Focal

You said:
a). Fresnel

Correct!

Review the section on beam steering and focusing.

See: Hourglass Beam

13. Which transducer produces a fan-shaped image with a blunted top?

a.) Phased
b.) Linear
c.) Curved Linear
d.) None of the above.

You said:
c). Curved Linear

Correct!

Review the section on transducer types.

See: Transducer Types

14. Which one of the following transducers does not support Duplex Imaging?

a.) Phased
b.) Linear
c.) Curved
d.) Mechanical

You said:
d). Mechanical

Correct!

Review the section on transducer types, specifically the advantages and disadvantages.

See: Transducer Types

15. Which one of the following transducers produces a pie or sector shaped image?

a.) Vector
b.) Phased
c.) Linear
d.) Curved

You said:
b). Phased

Correct!

Review the section on transducer types.

See: Transducer Types

16. All of the following are considered "conventional" focusing EXCEPT

a.) Electronic
b.) Lens
c.) Curved Element
d.) Curved Reflector

You said:
a). Electronic

Correct!

Review the section on focusing methods.

See: Focusing Methods

17. If electrical spikes are delivered to all the elements at the same time, in a straight line, the beam is ____________________________.

a.) Steered, but not focused
b.) Not focused or steered
c.) Focused, but not steered
d.) Focused and steered

You said:
b). Not focused or steered

Correct!

Review the section on electronic beam steering and focusing.

See: Electronic Beam Steering & Focusing

18. The size, or number of a group of elements is called the _________________.

a.) Focus
b.) Frequency
c.) Bandwidth
d.) Aperture

You said:
d). Aperture

Correct!

Review the electronic beam steering and focusing section, specifically aperture.

See: Aperture

19. Identify the transducer shown in the picture below.

a.) Phased
b.) Linear
c.) Curved
d.) Mechanical

You said:
c). Curved

Correct!

Review the section on transducer types.

See: Transducer Types

20. Which component of the stack is represented by the pink color in the picture below?

a.) Lens
b.) Matching Layer
c.) Damping Layer
d.) Element Ceramic

You said:
a). Lens

Incorrect!

Review the section on transducer construction - internal components.

See: Internal Components

21. Which stack component reduces acoustical impedance?

a.) Element
b.) Lens
c.) Matching Layer
d.) Damping Layer

You said:
c). Matching Layer

Correct!

Review stack components within the section on Internal Components.

See: Internal Components

22. Which one of the following statements is false?

a.) High frequency transducers are best used for superficial imaging.
b.) Thicker elements produce high frequency sound.
c.) The higher the frequency, the better the resolution.
d.) The lower the frequency, the better the penetration.

You said:
b). Thicker elements produce high frequency sound.

Correct!

Review the section on frequency.

See: Frequency

23. Which one of the following transducers does not produce a sector shaped image?

a.) Curved Linear Array
b.) Phased
c.) Annular
d.) Mechanical

You said:
d). Mechanical

Incorrect!

Review the section on beam formation for each transducer.

See: Curved Linear Array

24. Which transducer can measure extremely high velocities without aliasing?

a.) Phased
b.) Vector
c.) Annular
d.) CW

You said:
d). CW

Correct!

Review the section on CW transducers.

See: Continuous Wave

25. In the example provided by the author, what does the "C" in a C8-5 transducer mean?

a.) Compact
b.) Curved
c.) Center Frequency
d.) None of the above

You said:
b). Curved

Correct!

Review the section on naming transducers.

See: Naming Transducers

26. Which one of the transducers listed below is best suited for scanning a deep abdominal aorta?

a.) L7-4
b.) P12-5
c.) CL10-5
d.) C3540

You said:
d). C3540

Correct!

Review the section on transducer selection and transducer construction.

See: Transducer Selection

27. A voltage pulse applied to a group of elements without time delays describes which type of transducer?

a.) Linear
b.) Annular
c.) Mechanical
d.) Vector

You said:
a). Linear

Correct!

Review the section on linear array transducers.

See: Linear Array

28. The image below was produced with which transducer?

a.) Phased
b.) Linear
c.) Curved Linear
d.) CW

You said:
c). Curved Linear

Correct!

Review the section on curved linear transducers.

See: Curved Linear Array

29. The image below was produced with which transducer?

a.) Phased
b.) Curved Linear
c.) Mechanical
d.) Trapezoid

You said:
c). Mechanical

Incorrect!

Review the section on trapezoid or vector transducers.

See: Trapezoid Array