Introduction; Features; Principles Of Operation - Hitachi C41V1 Instruction Manual

1. Introduction

1.1 Features

C41V1 Probe is a Convex Array Probe.
The acoustic output of this probe when connected to ultrasound
diagnostic 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 diagnostic 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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