Hitachi EUP-L52, Инструкция по эксплуатации

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-1- Q1E-EP0348
1. Introduction
1.1 Features
The probes of models EUP-L53, L53L, L53S and L52 are Linear Array
Electronic Scanning type.
The acoustic output of these probes 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
operational manual of each ultrasound scanner.
These probes are categorized in class IIa according to
Directive 93/42/EEC.
According to IEC 60601-1 EUP-L53, L53L, L53S and L52 are 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.