Flashcards in Chapter 12 Deck (17):
Loss of entire image
Dropout of image information from the top to the bottom of the image. The location of the line corresponds to the broke crystal
Linear and Convex arrays
Erratic steering and focusing. The extent to which the image is affected is variable
A horizontal or side-to-side band of dropout at a particular depth
Annular phased arrays
Sector, mechanical, fixed, one and disc shape, image loss
Rectangular electronic, electric, approx 200 rectangular, vert line dropout
Linear sequential, or switched
Sector, electronic, electronic approx 200 rectangular, poor steering and focusing
linear phased array
Sector, mechanical, electronic, 5 ring, horizontal line dropout
annular phased array
always means adjustable or multi focus
When a spike pattern is a straight line
Is an unfocused sound beam
The sound beam is steered if the spike line has a?
The sound beam is focused if the spike pattern is?
Shame and number of active elements in the transducer
automatic redirection of the sound beams to create and image
Focusing of each sound beam
shape of two dimensional image
consequences of damaged or nonfuction active element in the probe
five characteristices of each transducer style
Linear- Active elements are arranged in a straight line.
Annular- Elements are arranged as circular rings with a common center
Convex- Active elements are arranged in a bowed or arched line. The transducer may also be called a curved or curvilinear array.
3. Transducer arrays