Physical Principle Used - GE Logiq 500 User Manual

Physical Principle Used

The transmission and reception of mechanical high frequency
waves through a transducer associated with a computer that
creates the image in a digital memory, are used for the creation
of medical ultrasound images. The spreading of mechanical
ultrasound waves produces echoes when body changes
density. In the case of human tissue, these echoes are created
when the signal goes from an adipose tissue (fat) region to a
muscular tissue region, among others. The echoes are
returned through the same transducer that converts them back
into electrical signals. These signals are highly amplified,
processed by filters with several frequency and time response
options, and finally scanned and stored in a digital memory.
Once in the memory, the image can be displayed in real-time on
a monitor. Several analog and digital circuits transform the
electrical high frequency signals into a flow of digital signals,
allowing the composition of the image in the memory. All the
signal reception and transmission parameters are controlled by
the main computer. Through the selection of these parameters
by the operator, the system modifies the transmission and
reception features allowing a wide range of uses, from
obstetrics to peripheral vascular examinations. As its design is
based on solid state components, the system is free from
variations over time and requires very little maintenance. All
the transducers are accurate solid state devices, allowing
control of creation of images from convex, micro-convex and
linear transducers. The use of a solid state design allows a
wide range of sweep parameters that can be optimized
resulting in a consistent creation of fine anatomical details with
excellent penetration and dynamic contrast band in the tissue.
The system features a sophisticated design, providing multiple
functions of diagnostic and function setup keys. This makes the
system user-friendly and easy to use.
LOGIQ 500 Basic Users Manual
2233658–100 Rev. 0
System Overview
1–3