Name that Transducer
When active elements are arranged in an arched line, they are called this.
convex, curved, or curvilinear
This is the only transducer with fixed focal depth.
mechanical transducer
This is created when an electronic spike pattern is a straight line
an unfocused beam
This is another name for elevational resolution
slice thickness
This type of “lobe” is created by single-element transducers, degrading lateral resolution.
Side lobes
In this type of transducer, when a PZT is damaged, the entire image is lost.
mechanical
this type of transducer produces a rectangular image
linear sequential array
This is one way that a sound beam can be focused
acoustic mirror, lens, curved crystal OR electronic phasing
Elevational resolution answers this question: Are reflections on the image created from structures directly in the imaging plane or from structures that lie ________ or ______ the imaging plane?
above and beneath
Reducing the strength of side and grating lobes is achieved through this process
apodization
When the linear sequential array transducer is steered, this shape is created.
parallelogram
Transducers with multiple active elements are called this
array
This is the ability for modern phased array systems to transmit multiple beams down the same scan line, each with a different focal depth
multi-focus
This crystal shape provides the best elevational resolution.
disc shaped
Subdicing is a process of dividing this into many sub-elements, reducing grating lobes.
crystal, active element or PZT
Grating lobes are created by this type of transducer
array transducers
This type of transducer contains disc-shaped crystals, thus providing the best elevational resolution
mechanical or annular phased array
This is the part of an ultrasound system that creates steering patterns.
the beam former
True or false, the 1.5 dimensional array transducer improves elevational resolution.
True
Rendering, the process by which this type of data acquired during an ultrasound exam is turned into an image, giving it a real-life look.
3D
What type of array experiences horizontal dropout at a particular depth when a crystal is damaged?
annular phased array
Subdicing of each element in this type of transducer reduced grating lobes
linear array
Electronic slope results in steering the sound of the beam. This is accomplished by altering this.
the electronic pattern for excitation of the crystals
True or false: Elevational resolution is identical to lateral resolution with disc shaped active elements
True
this technique can be used to make a sound beam narrow over a wide range of depths, optimizing lateral resolution
dynamic aperture