Chapter 13-15 Study Guide

Adjusting the output power affects the

Pulses

Determines how echo data is stored in memory will appear on display

Post processing

Directs the driving voltages from the pulses to the transducer during transmission and directs returning echo voltages to amplifiers during reception

Transmit/Receive Switch

Amplification is also known as

Receiver gain

Uses long pulses to create an image

Coded Excitation

Echo info is taken from the memory and converted so it can be shown on the display in

D to A converter

Part of receiver reducing low level echoes

Rejection

Smallest amount of digital storage

Bit

How are contrast and shades of gray related

Indirectly

Superior spatial resolution is due to

Increased line density

How does Increasing output power affect signal to noise

Increases

Image with one bit of memory has how many shades of gray

2

Where does the action originate

Bean former

Timing of the voltages sent to each element is determined by the

Beam former

Which resolution depends on penetration depth, line density, and number of foci

Temporal

Is responsible for electronic beam scanning, focusing, apodization, and aperture

Beam former

Part of machine responsible for timing reception of the pulses to determine location

Master synchronizer

Improves with multi focusing

Lateral resolution

Improves with higher line density

Spatial resolution

Type of zoom that has high quality zoom but must be in live

Write zoom

Number of images entered into memory per second

Frame rate

What are the charged particles emitted off the gun from rear end of tube

Electron

Reformats each data into image form for image processing storage and display

Scan converter

Uses multiple angles to produce single image

Spatial compounding

Read zoom is a function of

D to A converter