EKG MACHINES
About the ultrasound machines
Ultrasound or ultrasonography is a highly sophisticated method
of medical imaging that uses high frequency sound waves and
their echoes to create image of the objects on a visual monitor.
This technique is similar to the echo sounders used by bats,
whales and dolphins, as well as SONAR probes used by submarines.
A basic ultrasound system contains following parts:
1. A sensory transducer probe that sends and receives sound
waves. 2. A Central Processing Unit also known as CPU to
calculate the signals sent and received and to provide necessary
commands to the transducer, 3. Transducer pulse control units to
control amplitude, frequency and duration of the pulses 4. A
display monitor that shows the image 5. Keyboard to key in the
necessary inputs 6. Data storage external device to help you
store data in any format 7. A printer to help you print the image
The transducer probe is the most important part of this machine.
It has the capacity to create waves and receive those bounced
waves. It produces sound waves by a principle called
Peizoelectric effect. Many piezoelectric crystals change their
rapidly when induced with electricity. These cause vibrations
which eventually travel outwards towards the transducer surface.
The electric current can be used to send and receive sound
waves. This transducer also has a shock absorbing material which
can absorb reflections from the probe. A transducer item comes
in many shapes and forms, and its shape determines its field of
view, and the frequency of emitted sound waves determines how
deep the sound waves penetrate and the resolution of the image.
There are multiple transducer probes to help you take sensitive
readings. In addition to normal probes there are probes which
can be inserted inside vagina, rectum and esophagus to check the
inner details.
The central processing unit is the heart of the whole system and
this takes care of all calculating part of the operation. The
CPU sends electrical currents to the transducer probe to emit
sound waves, and also receives the electrical pulses from the
probes that were created from the returning echoes. The
transducer pulse controls allow the ultrasonographer, to set and
change the frequency and duration of the ultrasound pulses, as
well as the scan mode of the machine. Danny DeMichele highly
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