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Diffusion tensor imaging in hydrocephalus--findings before and after shunt surgery.
[hydrocephalus with stenosis of the aqueduct of sylvius]
To
evaluate
changes
in
diffusion
tensor
imaging
(
DTI
)
-
derived
parameters
in
patients
with
hydrocephalus
(
HC
)
before
and
several
weeks
after
shunt
surgery
.
Thirteen
HC
patients
were
examined
with
DTI
before
and
after
shunt
surgery
.
In
a
combined
region
of
interest
and
whole
brain
voxel-based
analysis
,
different
DTI
parameters
were
compared
with
an
age-matched
control
group
.
Alteration
of
DTI
parameters
in
HC
patients
and
changes
after
shunt
surgery
are
regionally
different
.
HC
patients
show
an
increase
in
fractional
anisotropy
values
based
on
increases
in
parallel
diffusivity
in
the
corticospinal
tract
.
On
the
other
hand
,
reduced
fractional
anisotropy
values
are
found
in
the
corpus
callosum
of
HC
patients
.
Following
shunt
surgery
,
all
DTI
parameters
showed
a
trend
towards
normalization
,
yet
differences
to
healthy
control
subjects
remained
.
Our
results
show
that
DTI
parameter
changes
are
regionally
dependent
and
need
a
careful
interpretation
of
the
underlying
diffusivities
to
serve
as
a
diagnostic
or
follow-up
measure
in
patients
with
hydrocephalus
.
Diseases
Validation
Diseases presenting
"yet differences"
symptom
hydrocephalus with stenosis of the aqueduct of sylvius
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