Download echo blaster 128 int-1z kit echo blaster 128 ext

TELEMED
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Echo Blaster 128 INT-1Z / EXT-1Z KIT User Guide, REV 2.4, 2005.05.06
Echo Blaster 128 EXT-1Z Kit (external, made as external device to be placed nearby
the PC computer);
Echo Blaster 128 PC-1Z scanner (Echo Blaster 128 INT-1Z Kit integrated into PC
computer);
Echo Blaster 128 PC-1Z Portable (Echo Blaster 128 INT-1Z Kit integrated into
portable case with LCD panel)
All other characteristics of these scanners and kits are same. Detailed specifications
of all modifications possible are available here: http://www.telemed.lt
4.2.1. Beamformer
Beamformer functions are:
excite electric pulses to fire the probe;
ultrasound echo signals pre-amplification;
compensation of the ultrasound attenuation due to travel depth;
reordering the receiving signal sequence and focusing by applying the appropriate
time delays;
• shifting the center frequency of BPF (band pass filter) to follow the frequency shift
that occurs according to the travel depth;
• the ultrasound signal compression by means of Log Amplifier, detection the echo
signal envelope
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4.2.2. Probe Unit
Probe unit is piezoelectric transformer which provides the acoustical pulse used to
exanimate the medium and used for both transmission and reception, i.e., the transducer is
used in pulse-echo mode. A voltage waveform is applied to the transducer and the
converted into an acoustic waveform (inverse piezoelectric effect). Acoustic pulse is then
partially transmitted and partially reflected by intervening soft tissues structures in the body.
The reflected acoustic waveform is received by the same transducer and is converted into a
voltage waveform (direct piezoelectric effect).
The probe unit consists up to 128 piezoelectric elements. Probe enclosure has a
relief/color mark to affix the scanning direction.
4.2.3. Personal Computer
All controls apply by computer keyboard and mouse / trackball / touchpad.
As a result, all ultrasound data and software interface can be observed on SVGA
monitor (LCD panel).
4.3.
Connection and Indication
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