Types of Transducers and Electronic Phasing Flashcards
What is known as a group of elements or crystals?
Array
What is known as applying voltage pulses to a group of elements in succession?
Sequencing
What type of transducer produces a rectangle image?
Linear sequenced array
What is the process of exciting crystals by small time differences?
Phasing
What is a vector array also called?
Trapezoidal scanning
In trapezoidal scanning, what portion of the beam is scanned via sequencing and phasing?
Sequencing = in the middle of the beam
Phasing = the “wings”
What is the term used for crystal excitation by small time differences?
Phasing / electronic steering
When phasing from L to R, where will the image appear?
Right
When phasing from R to L, where will the image appear?
Left
What transducer has the most number of scan lines?
Convex array / curvilinear probe
In a linear array transducer, the width of the whole image is equal to what?
The length of the array
What happens to the curvature and focus when there are GREATER time delays?
Greater curvature puts the focus more shallow
What happens to the curvature and focus when there are SMALLER time delays?
Smaller curvature puts the focus deeper
With a smaller NZL, will the focus be more shallow of deep?
More shallow
Will a shorter aperture create a shorter or longer NZL?
Shallow/shorter NZL
