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Sono Transducer 3

Physics of Sonography; Transducer Physics and Terms

QuestionAnswer
A complete scan of Ultrasound beam is called a _____. Frame.
The two methods of sending out scan lines to form an image are _________ and _________. Mechanical and electronic
Electronic Scanning is the dominate form of transducers. True or False? True
What is an Array? A grouping arrangement of parts forming a complete unit
Name the 3 types of Arrays Linear, Convex, Annular
What are 2 alternate names for Linear Array? Linear Sequenced; Linear Sequential
A Linear Array produces a ______ Image Rectangular
A rectangular image is produced by pulses that originate at different/same points across transducer. Different
Firing Sequence is? How many elements are fired in each group.
The Linear Sequenced Array is fired how? Sequential
The Linear Sequenced Array is Electronically/Mechanically focused? Electronically
What are 3 alternate names for a Convex Array? Curved Sequenced Array; Curved Sequential Array; Curvilinear array
The element in a Convex Array is curved. True or False? True
Do Linear Sequential Arrays have electronic steering and focusing? Yes
Convex Arrays form a ______ image Sector
A Curvilinear Array is fired how? sequentially
Name 3 types of Arrays for Phased Arrays Sector; Vector; Linear phased
A phased array applies voltage to all elements at almost the same time. True or False True
Define Phasing Voltage applied to all elements at almost the same time.
Steering the beam is also known as _____. Sweeping the beam
Sweeping the beam is produced by _____. Phasing
When steering the beam, a _____ shaped image is created. Sector
A Sector is a ______ array Phased
What is a Vector? A Sector transducer, but one which the scan lines do not have a common point of origin.
A phased array has Electronic steering AND focusing. True or False? True
Phased Arrays are used for? Cardiac, Abdominal, Neonatal, and Endocavitary
One ultrasound pulse can create multiple focal zones. True or False? False
A single line of elements can focus in how many planes? Only one plane
What are the other names for Section Thickness? Slice Thickness; Section Thickness
Section thickness is the second dimension of the ultrasound beam. True or False? False; It's the third dimension
A single line of elements can electronically focus or steer only in the third dimension. True or False? False; only in the scan plane
Focus can be achieved in the third dimension with a _____ or _____ _____ Lens; Curved Elements
With three rows of elements, phasing can be applied to focus the third dimension electronically. True or False? True
What eliminates the need for a lens or curved element? Electronic Focusing
What is a Grating Lobe? Sound that escapes outside the main beam in a multi element transducer.
What is the purpose of Apodization? To reduce grating lobes by varying the voltage to individual elements.
What is a Vector Array? An array that is created by phasing a linear sequenced array.
Which Array has a flat footprint: Sector Array or Vector Array? Vector Array
How is a parallelogram created? Phasing that is applied to linear sequential arrays.
How is an Annular Array Focused? Focused by Phasing
Annular Arrays cannot steer the beam. True or False? True
With Annular Arrays, the beam is steered Electronically. True or False False; Mechanically
The Listening Focus is known as? The Dynamic Focus
A Dynamic Focus continually changes as... the tissues are scanned
4d imaging is... 3d imaging in real time
Created by: A-Hole
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