Transducer Types and Multi-Frequency Technology

Vocabulary practice flashcards based on lecture notes covering various ultrasound transducer types, their imaging characteristics, and technical advantages/disadvantages.

What is another name for a Linear Sequenced array

Linear Array or Linear Switched Array

Q: How does a Linear Sequenced Array operate?

operated by applying voltage pulses to groups of elements in succession-sequencing

What is the shape phased linear ( sequenced) array

Rectangular image is produced

No steering

No focusing

In linear sequence array ( linear array or linear switched array;) advantage?

Beams creating image are parallel at all depths very accurate measuring

In linear sequence array ( linear array or linear switched array;) disadvantage?

Large footprint

Fixed focus

What transducer is this ?

Linear sequence array

What is another name for Curved Sequenced Array and what is it ?

Also called curved, curvilinear, or convex array; It curved line of elements. It convex-bowed out.

What does curved sequenced array produced ?

Produced blunted sector image

In curved sequenced array due to transducer shape,

Scan lines are steered outward and no focusing

What is the advantage of curve sequenced array

Natural sector image with wide near field.

What is the disadvantage of curve sequenced arrray

Fixed focus

What transducer is this ?

Curved sequenced array

In phased linear(Sequence) array

Linear sequenced array +phasing for focusing.

How phased linear (sequenced) array operate?

Operate by applying voltage pulses to groups of elements in succession with small time delays.

What combo for focusing phased linear (sequenced) array for focusing

Linear sequenced array + phasing for focusing

Phased linear (sequenced) array status

Rectangular image

No steering Focusing

Focuses by phasing

What are advantages phased linear sequences array

Variable focus

Which transducer is phased curved sequence array operates identical to ?

Phased linear array

In phased curves sequence array due to transducer shape

Scan lines are steered outward

How does phased curved sequence array focus

Focus by phasing

What is the advantage of phased linear sequences array

Variable focus

What are disadvantages phased linear sequences array

Expensive & complex

Vector Array

A linear sequenced array that uses phasing for both steering and focusing

How does vector array operate?

Operate by applying voltage pulses to groups of elements in succession with small time delays.

What type of sector vector arrays have?

sector with flat top

How does vector array steers?

steers by phasing

How does vector array focuses ?

Focus by phasing

What is Linear Phased Array also called?

Also called phased array.

How does linear phased array operates

operates by applying voltage pulses to all elements but with small time differences or delays

What sector does linear phased array

Sector image

how does linear phased array ?

Steer by phased

How does linear phased array focus

Focused by phasing

What is the advantages of linear phased array

Small footprint, variable focus

What is the disadvantage of linear phased array

Narrow near field

What is Annular Phased Array also call

also called annular array

How does the sound beam shape in annular phased array

Is cone shape and focusing phasing

How does Annular phased array shape ?

ring shaped, multi-element transducer

How does annular phased array operate

Operate like phased array

annular phased array can focused in ?

the z-axis, keeping section thickness artifact to a minimum

On/Off Switch Mode

A multi-frequency transducer performance method where the user manually switches between specific frequencies like $3.5$ or $5.0$.

True Multi-Frequency

A performance mode where multiple frequencies are transmitted and received simultaneously, providing broad bandwidth and improved resolution at all depths.

L shaped transducers

Transducers used in the OR that operate at much higher frequencies ranging from $10 - 15\,MHz$.

With linear array, what can you only focus in?

In the z-axis by adding a lens or curved element(fixed)

What transducers is this ?

L shaped transducers or transducers

What is the frequencies in L shape transducer

Much higher frequencies 10-15 MHz

Matrix array transducer

1.5, 2D

What matrix arrays. What dynamic do you have and disadvantage

you have dynamic focusing in z-axis. Disadvantage is section thickness artifact

What transducer is this?

Matrix arrays

What transducer is this ?

Matrix arrays

What degree is this image

180-degree image

What degree is this image

180- degree image

What is Intracavity Transducers

Transducers used closer to anatomy that provide better resolution via higher frequencies and are cleaned by soaking in a chemical solution.

What transducers is this ?

Intracavity transducer

What transducers is this ?

Intracavity transducers