Chapter 12: Back of Book

With these transducers, the ultrasound beam is steered by a motor, a rotating reflecting mirror, or a similar device

• Linear Switched array transducer

• Linear Phased array transducer

• Mechanical Transducer

• Annular Phased array transducer

These transducer focus the ultrasound beam electronically.

• Linear Switched array transducer

• Linear Phased array transducer

• Mechanical transducer

• Annular Phased Array transducer

• Convex or Curvilinear array transducer

With these transducers, the ultrasound beam is focused with an acoustic lens, a mirror, or by milling the PZT crystal in a curved shape.

• Linear Switched array transducer

• Linear Phased array transducer

• Mechanical transducer

• Convex or Curvilinear array transducer

True or False

With regard to mechanical transducers, the ultrasound beam is directed in many different directions to create an imaging plane.

• True

• False

True or False

With regard to mechanical transducers, the ultrasound beam is not focused electronically

• True

• False

True or False

With regard to mechanical transducers, there is communication between the pulser of the ultrasound system and the PZT crystal of teh transducer

• True

• False

True or False

With regard to mechanical transducer, foci exist at multiple depths as an ultrasound beam propagates through the body.

• True

• False

Which two of the following terms are associated with phased array transducers?

• lens

• multi-focus

• mirror

• adjustable

• external

The minimum number of active elements in a mechanical transducer is

• 1

• 0

• 2

• none of the above

Which best describes the elements in a linear phased array transducer?

• Rectangular, 1/4 wavelength thick

• Rectangular, 1/2 to 1/4 wavelength wide

• Circular

• Squares, 1/2 wavelength thick