Introduction; Features; Principles Of Operation - Hitachi EUP-O53T Instruction Manual

1.

Introduction

1.1

Features

The probe of Model EUP-O53T has Linear Array electronic
scanning type.
The acoustic output of this probe when connected to ultrasound
scanner was measured according to the IEC60601-2-37 standard.
The table of measured acoustic output data is contained in
the operation manual of each ultrasound scanner.
This probe is categorized in class IIa according to Directive
93/42/EEC.
According to IEC60601-1 the probe is classified as type BF.
1.2

Principles of operation

This probe and the ultrasound diagnostic scanner enable image
diagnosis using ultrasonic waves.
This system operates under the principles described below.
1) When an electric pulse signal is applied from the
transmitter to the transducer of the probe, the transducer
converts electric signals into mechanical vibration
energy for emitting pulse-shaped ultrasonic waves into the
body part, liquid or other medium contacting the
transducer.
2) The emitted ultrasonic waves are reflected by boundaries
with different acoustic characteristics (acoustic
impedance) within the body.
3) The transducer is also used to receive reflected ultrasonic
waves. The transducer vibrates mechanically due to the
received ultrasonic waves and converts mechanical
vibrations into electric energy. Electric signals are
converted to shades of brightness by brightness modulation
to obtain an image.
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