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Phase-contrast MR imaging support for the diagnosis of aqueductal stenosis.
[hydrocephalus with stenosis of the aqueduct of sylvius]
Patients
with
aqueductal
stenosis
(
AS
)
present
with
various
clinical
and
radiologic
features
.
Conventional
MR
imaging
provides
useful
information
in
AS
but
depends
on
a
subjective
evaluation
by
the
neuroradiologist
.
The
purpose
of
this
study
was
to
evaluate
the
support
of
the
phase-contrast
MR
imaging
(
PC
-MR
imaging
)
technique
(
sensitive
to
CSF
flows
)
for
the
diagnosis
of
AS
.
We
retrospectively
considered
17
patients
who
underwent
PC
-MR
imaging
to
explore
hydrocephalus
,
with
the
absence
of
CSF
flow
at
the
aqueductal
level
.
We
analyzed
their
clinical
and
morphologic
MR
imaging
data
.
None
of
the
usually
reported
direct
or
indirect
signs
of
aqueductal
obstruction
were
seen
in
7
patients
in
whom
the
clinical
suggestion
of
AS
was
confirmed
by
PC
-MR
imaging
results
.
Seven
patients
in
this
population
had
a
third
ventriculostomy
,
and
5
of
them
were
among
those
in
whom
conventional
MR
imaging
failed
to
reveal
signs
of
aqueductal
obstruction
.
All
of
these
7
patients
had
a
positive
postsurgical
outcomes
.
The
analysis
of
CSF
and
vascular
dynamic
data
in
this
population
was
compared
with
an
aged-matched
population
,
and
these
data
were
found
similar
except
for
the
fourth
ventricular
CSF
flush
flow
latency
.
PC
-MR
imaging
supports
the
diagnosis
of
CSF
flow
blockage
at
the
aqueductal
level
in
a
reliable
,
reproducible
,
and
rapid
way
,
which
aids
in
the
diagnosis
of
AS
in
patients
with
clinical
and
/
or
radiologic
suggestion
of
obstructive
hydrocephalus
.
We
,
therefore
,
suggest
using
this
technique
in
the
current
evaluation
of
hydrocephalus
.
Diseases
Validation
Diseases presenting
"with the absence of csf flow at the aqueductal level"
symptom
hydrocephalus with stenosis of the aqueduct of sylvius
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