Term
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Definition
| Displayed as a series of spikes that represent the amplitude of the reflection. |
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Term
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Definition
| Displayed as a line of dots with varying brightness depending on the strength of the reflections. |
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Term
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Definition
| Displayed as groups of wavy lines that represent the depth of the reflectors and the movement of the reflector. |
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Term
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Definition
| The combination of the active element, wire, and system electronics. |
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Term
Mechanical Transducer
(Conventional) |
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Definition
- Has 1, circular, disc-shaped element that moves.
- Blunted sector footprint.
- Mechanical steering.
- Fixed focus. (unfocused)
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Term
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Definition
- 3 crystals placed in a ring like bullseye making multiple focal zones.
- Mechanical steering.
- Electronic focusing.
- Sector shaped footprint.
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Term
Linear Sequential Array
(Switched)
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Definition
- 120-250 crystals that fire in groups of 5-10 at a time.
- Rectangle footprint.
- Electronic/straight steering.
- Electronic fixed focus.
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Term
Convex Sequential Array
(Switched) |
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Definition
- 120-250 crystals that fire in groups of 5-10 in a bowed line.
- Electronic/straight steering
- Electronic fixed focus.
- Blunted sector footprint.
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Term
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Definition
- 100-300 crystals that fire in a line via time delays.
- Electronic steering.
- Electronic focusing.
- Rectangle footprint.
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Term
|
Definition
- 100-300 crystals that fire in a bowed line via time delays.
- Electronic steering.
- Electronic focusing.
- Blunted sector footprint.
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Term
|
Definition
- 100-300 crystals that fire in a line via time delays.
- Electronic steering.
- Electronic focusing.
- Rectangle or sector footprint
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Term
|
Definition
- 100-300 crystals that fire in a line via time delays.
- Electronic steering.
- Electronic focusing.
- Trapezoid footprint
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Term
Electronic Beam Steering
(Phasing) |
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Definition
| Sound beams are electronically transmitted in different directions without the use of moving parts. |
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Term
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Definition
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Term
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Definition
| Infinitesimal time differences between many wavelets that create a single unified sound beam direction. |
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Term
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Definition
| Additional areas of sound energy created by a single element transducer that extend outside of the main beam in the far zone. |
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Term
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Definition
Additional areas of sound energy created by array transducers that extend outside of the main beam in the far zone.
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Term
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Definition
| Reduces side and grating lobes by varying the voltage with the strongest voltage in the center. |
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Term
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Definition
| Type of electronic focusing, used only with phased array transducers, designed to narrow the beam at increased depths. |
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Term
| Slice Thickness Resolution |
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Definition
Elevational Resolution
3-D |
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Term
|
Definition
| A crystal that has been divided into smaller crystals (sub-elements) and are electronically joined and act as 1 crystal. |
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Term
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Definition
| 2-D images displayed 1 frame at a time. |
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Term
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Definition
| The number of frames created each second. |
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Term
|
Definition
Determined by the frame rate, it is the ability to precisely position moving structures from instant to instant.
"Accuracy in time." |
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Term
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Definition
| The time it takes to create 1 frame. |
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Term
|
Definition
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Term
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Definition
| The space between the sound beams. |
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Term
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Definition
The overall detail in an image.
Includes axial, lateral, and elevational resolution. |
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