Chapter 14

What is the function in the receiver that is used to create images of uniform brightness from top to bottom?

Compensation

What is the function in the receiver that reduces the total range of signals from smallest to largest?

Compression

What is the synonym for compensation?

Time Gain Compensation

What are the two parts of Demodulation

Rectification Smoothing

What is the function in the receiver that increases the strength of electrical signals in the receiver prior to further processing?

Amplification

What are the five functions in the receiver in alphabetical order?

Amplification Compensation Compression Demodulation Rejection

What is a pulser called in the phased array system?

Beam Former

Depth at which variable compensation begins

Delay

What is the function in the receiver that changes the signals form to be more suitable for display?

Demodulation

The maximum amount of compensation the receiver is found where on the TGC curve?

Far Gain

If the image is too dark what should you do?

First increase the receiver gain.

If the image is too bright what should you do?

First reduce the output power.

Where on the TGC curve is compensation at it's maximum?

Knee

What are the six components of the ultrasound system?

Master Synchronizer, Transducer, Beam Former/Pulser, Reciever, Display, & Storage

Where on the TGC curve does reflections undergo a small amount of even compensation?

Near Gain

What adjusts the strength of sound pulses that transducer sends into body?

Output Power

What is the synonym for amplification?

Overall Gain

What boosts strength of weak returning signals from body, and process and prepare them for display?

Receiver

What changes the amplification of electronic signals after returning to the receiver?

Receiver Gain

What is the function in the receiver that displays low level echoes only when they are clinically meaningful?

Rejection

Where on the TGC curve does compensation correct for the increasing amount of attenuation occur with increasing depth?

Slope

What is the synonym for rejection?

Suppression Threshold

What is on the x-axis and on the y-axis on the TGC curve?

x-axis: TGC y-axis: depth