Microwave Tomography. Clinical application
Abstract
The clinical applications of a microwave tomographic system are studied. Imaging parameters are appropriate for medical use : a spatial resolution of 7mm anda contrast resolution of 1% for a measurement time of 3 seconds. Measurements on tissue-simulating numerical simulations are presented of tissue distribution and for pathological and induced changes in Introduction phantoms and volunteers, together with to assess the system for absolute imaging differential imaging of physiological, tissues.
Full text
-461-
MICROWAVE
TOMOGRAPHY
-CLINICAL APPLICATION
M.S.Hawley
*•
A.B oque as*
,
L.Jo e
*•
E.
de
los
Reyes
*•
H.Almi all**
Abs ac
The
clinical
applica ions
o
a
mic owa e
omog aphic
sys em
a e
s udied.
Imaging
pa ame e s
a e
app op ia e
o
medical
use
: a
spa ial
esolu ion
o
7mm
anda
con as
esolu ion
o
1%
o
a
measu emen
ime
o
3
seconds.
Measu emen s
on
issue-simula ing
nume ical
simula ions
a e
p esen ed
o
issue
dis ibu ion
and
o
pa hological
and
induced
changes
in
In oduc ion
phan oms
and
olun ee s,
oge he
wi h
o
assess
he
sys em
o
absolu e
imaging
di e en ial
imaging
o
physiological,
issues.
Fo ming
images
o
he
human
body
using
ionlslng
adia ion
has
been
a
pa
o
he
diagnos ic
p ocess
in
medicine
o
many
yea s.
Mo e
ecen ly,
o he
p obing
adia ions,
no ably
ul asound,
ha e
p o ided
success ul
diagnos ic
images.
Tomog aphy
is
now
in
widesp ead
use
in
he
clinic
wi h
ionising
adia ions
(
X- ay,
iso opes)
and
wi h
Nuclea
Magne ic
Resonance
imaging.
In
he
pas
ew
yea s,
o he
p obing
adia ions
ha e
been
conside ed
o
omog aphy,
including
ul asound
[1,2],
e y
low
equency
elec omagne ic
ields
in
elec ical
impedance
omog aphy
[3]
and
mic owa es
[4,5].
Mic owa e
di ac ion
omog aphy
is
an
imaging
echnique
which
gi es
in o ma ion
on
he
dielec ic
p ope ies
o
he
body,
da a
which
is
dis inc
om
bu
complemen a y
o
o he
me hods
based
on
di e en
adia ions.
Resea ch
in o
cylind ical
mic owa e
omog aphy
o
medical
applica ions
began
in
Ba celona
in
1985,
he
de elopmen
o
a
i s
p o o ype
[6],
has
now
eached
he
s age
whe e
clinical
applica ion
can
be
conside ed.
Imaging
pa ame e s
a e
app op ia e
o
clinical
use:-
a
spa ial
esolu ion
o
7
mm
wi hin
a
use ul
diame e
o
20
cm, a
o al
measu emen
ime
o
3
seconds
and
a
con as
esolu ion
o
a ound
1%
o
a
change
in
cen al
pe mi i i y.
Two
a eas
o
applica l.on
a e
being
in es iga ed.
Fi s ly,
he
la ge
a ia ion
o
dielec ic
pa ame e s
be ween
di e en
body
issues
allows
he
o ma ion
o
high
con as
absolu e
images.
Secondly,
dielec ic
pa ame e s
a y
wi h
so ne
physiological
changes
and
he e o e
di e en ial
mapping
o
hese
al e a ions
is
possible.
2.
Absolu e
imaging
Absolu e
imaging
implies
aking
single
ame
da a
se s
o
econs uc
images
which
con ain
in o ma ion
on
he
issue
s uc u e
o
he
objec .
*
Dep.
de
Teo ía
de
Señal
y
Comunicaciones,
ETS
Ing.
de
Telecomunicación,
Uni .
Poli écnica
de
Ca aluña.
**
Dep.
de
Psiquia ía
y
Psicobiología
Clínica,
Fac.
de
Psicología,
Uni .
de
Ba celona.