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8 Cards in this Set

  • Front
  • Back
Axial Resolution
Two objects vertically in line
Related to depth
SPL/2
Lateral Resolution
Two objects horizontally in line
Related to beam width
Crystal Thickness
l/2
Determines the Frequency
Q-Value
Ring time of a transducer
DMS uses a low-Q value
Bandwidth
Number of frequencies within a beam
(wide bandwidth-short SPL-, low q value, good resolution)
Step Down Segmental Linear Array
Used today in DMS
Only disadv. is the cost
Overlapping chunks to improve lateral resolution
Mechanical Focusing
Narrows the beam in the elevation direction
Curve crystal, use lens
Slick thickness is adjusted
Fixed Focal Zone
Electronic Focusing
Creates in-plane beam width
Depth can be varied
Dynamic
Not Fixed Focal Zone