-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.