A predictive surrogate model based on linear and nonlinear solution manifold reduction in cardiovascular FSI: A comparative study
Computers in Biology and Medicine,
Год журнала:
2025,
Номер
189, С. 109959 - 109959
Опубликована: Март 5, 2025
This
study
investigates
the
fluid-structure
interaction
(FSI)
simulation
of
abdominal
aorta,
with
a
particular
focus
on
hemodynamic
alterations
induced
by
aneurysmal
deformations.
The
behavior
within
aorta
is
highly
dependent
geometric
characteristics
aneurysm,
necessitating
use
patient-specific
models
to
ensure
accurate
predictions.
primary
objective
this
research
enhance
predictive
capability
flow
and
structural
indices
in
complex
FSI
biomechanical
setting
under
varying
physiological
conditions,
namely
rest
exercise
states.
paper
presents
comparative
analysis
between
two
distinct
yet
promising
surrogate
models:
Proper
Orthogonal
Decomposition
coupled
Long
Short-Term
Memory
(POD
+
LSTM)
Convolutional
Neural
Network
combined
(CNN
LSTM).
methodology,
model
selection,
performance
are
discussed
detail,
providing
insights
into
efficacy
limitations
each
approach
context
personalized
cardiovascular
simulations.
Язык: Английский
Impact of aneurysm sac size on the effectiveness of endovascular coiling in patient-specific middle cerebral artery aneurysms: a computational study
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Март 14, 2025
This
study
investigates
the
hemodynamic
efficiency
of
endovascular
coiling
in
treatment
patient-specific
middle
cerebral
artery
(MCA)
aneurysms
using
computational
models
both
original
and
scaled-down
geometries.
Computational
fluid
dynamic
(CFD)
is
used
for
blood
flow
modelling
inside
aneurysms.
The
Casson
non-Newtonian
model
employed
to
simulate
dynamics,
while
a
porous
condition
represents
within
aneurysm
sac.
Key
factors,
including
wall
shear
stress
(WSS)
oscillatory
index
(OSI),
are
analyzed
evaluate
effectiveness
across
different
sizes.
Results
indicate
that
significantly
reduces
rupture
risk,
with
larger
sac
volumes
demonstrating
more
pronounced
decrease
high-risk
zones.
These
findings
offer
insights
into
optimizing
treatments
varying
morphologies.
Язык: Английский
Investigating hemodynamic factors and rupture risk in internal carotid artery aneurysms: A computational and statistical analysis
Physics of Fluids,
Год журнала:
2025,
Номер
37(3)
Опубликована: Март 1, 2025
This
study
investigates
the
role
of
hemodynamic
factors
in
assessing
rupture
risk
intracranial
internal
carotid
artery
saccular
aneurysms.
A
total
24
unruptured
and
12
ruptured
aneurysms
were
analyzed
using
computational
fluid
dynamics
statistical
methods
to
identify
meaningful
relationships
between
parameters
risk.
Key
metrics,
including
maximum,
mean,
minimum
values
blood
velocity,
oscillatory
shear
index
(OSI),
statistically
compared.
The
Weibull
model
was
employed
evaluate
potential
connections
these
aneurysm
rupture.
spatial
distribution
mapped
on
sac
surface
high-risk
regions
prone
Results
revealed
that
exhibit
lower
maximum
velocity
compared
ones.
Additionally,
demonstrated
higher
OSI
values,
highlighting
a
distinct
difference
profiles.
These
findings
provide
valuable
insights
into
biomechanical
influencing
may
inform
clinical
assessment
strategies.
Язык: Английский