High
Technology
Medical
Devices
5
|
Sreznevského
17,
831
03
Bratislava,
Slovakia
Tel:
+421
2
446
409
77
;
Mobile:
+421
948
610
228,
+421
903
114
944
;
Mail:
Web:
www.onkocet.eu
5.
Device
Structure
and
operation
principles
The
device
set
consists
of
the
following
items:
Infrared
photoreceiver
device
Controller
of
the
photoreceiver
device
Module
of
working
on
the
base
of
computer
All
material
bodies
with
the
temperature
above
‐
273
K
emit
the
electromagnetic
radiation,
which
in
accordance
to
the
Planck
formula
can
be
presented
in
the
form,
shown
on
Fig.
1
(the
dependence
of
the
emission
of
photons
on
the
wavelength
at
two
temperatures
of
blackbody
is
shown).
With
an
increase
in
the
temperature
of
objects
the
number
of
emitted
quanta
of
radiation
(IR
‐
radiation)
with
the
fixed
wavelength
increases.
A
pure
gain
in
the
flow
with
an
increase
in
the
temperature
increases
with
the
decrease
of
wavelength
and
therefore
short
‐
waver
photoreceiver
with
the
registration
of
the
thermal
image
of
object
can
give
a
very
high
‐
contrast
image.
Photoreceiver
devices,
sensitive
in
the
range
of
2,65
‐
3,1
mkm
are
used
in
the
SVIT
thermal
imaging
system.
Fig.1.
Dependence
of
the
density
of
the
flow
of
the
quanta,
emitted
by
blackbody
at
two
temperatures,
on
the
wavelength
The
emitted
light
quanta,
including
invisible
(infrared)
with
the
wavelength
>
1
mcm
can
be
registered
by
the
sensors
of
infrared
radiations.
The
thermal
image
of
objects
is
formed
with
special
infrared
lens
and
is
recorded
by
the
photosensitive
elements
of
the
matrix,
established
in
the
focal
plane
of
lens.
The
elements
of
focal
matrix
convert
light
quanta
into
the
electric
charges,
which
are
read
by
multiplexer,
are
strengthened,
they
are
preliminarily
processed
by
electronic
circuit
and
then
transferred
to
the
computer.
As
a
result,
the
thermal
‐
vision
image
of
object
is
reflected
on
the
screen
of
monitor.
The
software
of
the
instrument
allows
examining
of
the
temperature
distribution
over
the
surface
of
the
skin
of
patient
and
measuring
of
the
temperature
in
any
point
of
image.
The
techniques
of
diagnosing
of
diseases
is
explained
in
Doctor’s
Manual.
The
functional
diagram
of
the
instrument
is
shown
in
Fig.
2.
The
measurement
of
the
distribution
of
temperature
over
the
body
surface
of
patient
is
produced
without
any
contact
of
instrument
with
the
skin
of
patient.
Instrument
measures
the
natural
radiation,
radiated
by
patient,
from
distance.
Summary of Contents for SVIT
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