ch 14 Pulsed echo instrumentation

2 major functions of an US system

1. Preparation & transmission of electrical signals to xducer

   1. creation of sound beam

2. Reception & processing of electrical signals from the xducer to create meaningful images and sounds

6 major components of the US system

1. xducer

2. Pulser & beam former

3. Receiver

4. Display

5. Storage

6. Master synchronizer

2 Roles of Xducer

1. Transforms electrical energy to acoustic energy (transmission)

2. Converts returning acoustic energy into electrical energy (reception)

role of the pulser and beam former

creates and controls electrical signals that will be sent to the xducer to create sound pulses

pulser determines

Amplitude, PRP, PRF

beam former determines

Firing delay patterns in array systems

receiver role

transforms electrical signals created by reflected sound (via xducer) into a form suitable for display

Display role

presents processed data (monitor, spectral plot, ect.)

storage role

archives US studies

• computer hard drives, CD, DVD, Videotape, paper printouts, USB drives, magneto-optical discs

master synchronizer role

maintains & organizes systems components and maintain proper timing

pulser