trasndicer arrays

2D what it creates

How ?

Virtual anatomical Cross sectional image ( a slice through the body)

By sending multiple narrow sound beams in different directions

Narrow beam

Better lateral resolution

Sharper image

Multiple pulses

Many scan lines= one complete image

Steering

Changing the direction of the beam electronically to create a 2D image

Characteristics of a mechanical transducer

What type of Cristal and how many crystals

steering technique

Fixed focus

Image shape

What happens if crystal breaks

One disc

Mechanical

One focal depth

Fan or pie slice sector

How many crystals does a transducer array has

Multiple elements

The probe has multiple crystals instead of just one

One crystal

One Chanel = one scan line

More Chanel’s = more lines =

Better picture

Frame =

One picture

Frame rate and average

How many pictures ( frames ) taken in 1 second

Average 30

What happens if more than one crystal is fired at the same time

This makes the beam stronger and improves performance

How is density applied to the beam and what is overlapping

The more lines, the better the density, the stronger the beam , the better the performance

What does beam steering and repeated pulse transmission generate

Real time images