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