Adaptable, wearable, and stretchable coils: A review
Magnetic Resonance in Medicine,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 4, 2025
Abstract
Over
the
last
four
decades,
there
have
been
various
evolutions
in
design
and
development
of
coils,
from
volume
coils
to
recent
introduction
wireless
receive
arrays.
A
aim
has
develop
that
can
closely
conform
anatomy
interest
increase
acquired
signal.
This
goal
given
rise
designs
ranging
adaptable
transmit
on‐body
stretchable
arrays
made
using
fabric
or
elastomer
substrates.
review
covers
design,
fabrication
details,
experimental
setup,
MRI
results
adaptable,
wearable,
coils.
The
active
passive
automatic
tuning
matching
strategies
are
examined
with
respect
mitigating
signal‐to‐noise
ratio
reduction
when
coil
form
is
altered.
brief
discussion
which
provide
a
solution
overcome
cabling
issues
associated
development,
also
included.
techniques
represent
innovative
radiofrequency
solutions
pave
way
for
next‐generation
hardware
development.
Язык: Английский
Flexible array coil for cervical and extraspinal (FACE) MRI at 3.0 Tesla
Physics in Medicine and Biology,
Год журнала:
2023,
Номер
68(21), С. 215011 - 215011
Опубликована: Окт. 10, 2023
Objective.High-resolution
MRI
of
the
cervical
spine
(c-spine)
and
extraspinal
neck
region
requires
close-fitting
receiver
coils
to
maximize
signal-to-noise
ratio
(SNR).
Conventional,
rigid
C-spine
do
not
adequately
contour
accommodate
varying
body
shapes,
resulting
in
suboptimal
SNR.
Recent
innovations
flexible
surface
coil
array
designs
may
provide
three-dimensional
(3D)
bendability
conformability
optimize
SNR,
while
improving
capabilities
for
higher
acceleration
factors.Approach.This
work
describes
design,
implementation,
preliminaryin
vivotesting
a
novel,
conformal
23-channel
receive-only
(FACE)
at
3-Tesla
(T),
with
use
high-impedance
elements
enhance
coil's
flexibility.
Coil
performance
was
tested
by
assessing
SNR
geometry
factors
(g-factors)
phantom
compared
conventional
21-channel
head-neck-unit
(HNU).In
vivoimaging
performed
healthy
human
volunteers
patients
using
high-resolution
c-spine
protocols
3T,
including
MR
neurography
(MRN).Main
results.Mean
FACE
141%-161%
left,
right,
posterior
off-isocenter
positions
4%
isocenter
HNU.
Parallel
imaging
comparable
an
factor
(R)
=
2
×
between
two
coils,
but
improved
forR=
3
meang-factors
ranging
from
1.46-2.15
2.36-3.62
obtained
Preliminary
volunteer
patient
testing
confirmed
that
equivalent
or
superior
image
quality
could
be
evaluation
osseous
soft
tissue
structures
FACE.Significance.A
highly
can
potentially
enable
higher-resolution
imaging.
Язык: Английский
Dual-Channel Stretchable, Self-Tuning, Liquid Metal Coils and Their Fabrication Techniques
Sensors,
Год журнала:
2023,
Номер
23(17), С. 7588 - 7588
Опубликована: Сен. 1, 2023
Flexible
and
stretchable
radiofrequency
coils
for
magnetic
resonance
imaging
represent
an
emerging
rapidly
growing
field.
The
main
advantage
of
such
coil
designs
is
their
conformal
nature,
enabling
a
closer
anatomical
fit,
patient
comfort,
freedom
movement.
Previously,
we
demonstrated
proof-of-concept
single
element
design
with
self-tuning
smart
geometry.
In
this
work,
evaluate
the
feasibility
scaling
concept
to
multi-element
array
associated
engineering
manufacturing
challenges.
To
goal,
study
dual-channel
using
full-wave
simulations,
bench
testing,
in
vitro,
vivo
3
T
scanner.
We
use
three
fabrication
techniques
manufacture
receive
arrays:
(1)
single-layer
casting,
(2)
double-layer
(3)
direct-ink-writing.
All
fabricated
arrays
perform
equally
well
on
produce
similar
sensitivity
maps.
direct-ink-writing
method
found
be
most
advantageous
technique
speed,
accuracy,
repeatability,
total
thickness
(0.6
mm).
Bench
tests
show
excellent
frequency
stability
128
±
0.6
MHz
(0%
30%
stretch).
Compared
commercial
knee
array,
more
anatomy
provides
50%
improved
signal-to-noise
ratio
region
interest.
Язык: Английский
Stretchable Sensor Materials Applicable to Radiofrequency Coil Design in Magnetic Resonance Imaging: A Review
Sensors,
Год журнала:
2024,
Номер
24(11), С. 3390 - 3390
Опубликована: Май 24, 2024
Wearable
sensors
are
rapidly
gaining
influence
in
the
diagnostics,
monitoring,
and
treatment
of
disease,
thereby
improving
patient
outcomes.
In
this
review,
we
aim
to
explore
how
these
advances
can
be
applied
magnetic
resonance
imaging
(MRI).
We
begin
by
(i)
introducing
limitations
current
flexible/stretchable
RF
coils
then
move
broader
field
flexible
sensor
technology
identify
translatable
technologies.
To
goal,
discuss
(ii)
emerging
materials
currently
used
for
substrates,
(iii)
stretchable
conductive
materials,
(iv)
pairing
matching
conductors
with
(v)
implementation
lumped
elements
such
as
capacitors.
Applicable
(vi)
fabrication
methods
presented,
review
concludes
a
brief
commentary
on
(vii)
discussed
technologies
MRI
coil
applications.
The
main
takeaway
our
research
is
that
large
body
work
has
led
exciting
new
innovations
allowing
wearables,
but
further
exploration
manufacturing
techniques
remains
necessary,
especially
when
diagnostics.
Язык: Английский
3D Printing of Silicone Organogel Elastomers for Structured Soft Biomaterials
ACS Biomaterials Science & Engineering,
Год журнала:
2024,
Номер
11(3), С. 1806 - 1817
Опубликована: Дек. 31, 2024
Creating
customizable
soft
medical
implants
and
devices
tailored
to
patient-specific
anatomy
represents
a
significant
challenge
in
healthcare,
requiring
3D-printable
materials
with
viscoelastic
properties
similar
those
of
natural
tissue,
high
adaptability,
biocompatibility.
Here,
we
develop
family
silicone
organogel
inks
for
3D
printing
tunable
biomaterials
via
direct
ink
writing
(DIW).
We
have
developed
set
formulations
comprising
photo-cross-linkable
polymers,
oil,
fumed
silica
nanoparticles
modify
the
rheological
behavior
inks,
optimize
their
printability,
control
printed
materials.
The
formulation
approach
decouples
viscosity
shear-thinning
from
materials,
yielding
elastomeric
spanning
3
orders
magnitude
moduli.
These
were
used
multimaterial
DIW
print
soft-structured
nonlinear
behavior,
leveraging
graded
spatial
heterogeneity
introduce
stress
dissipation
out-of-plane
deformation
mechanisms.
biocompatibility
these
was
analyzed
through
variety
cytotoxicity
assays
human
dermal
fibroblasts,
showing
no
toxicity,
even
oil
content.
Due
wide
tunability,
biocompatibility,
easy
show
great
potential
useful
many
applications,
including
implants,
prosthetics,
wearable
devices,
phantoms,
robotics,
devices.
Язык: Английский
Effect of Injection Parameters on the MRI and Dielectric Properties of Condensation-Cured Silicone
Polymers,
Год журнала:
2023,
Номер
15(24), С. 4670 - 4670
Опубликована: Дек. 11, 2023
Phantoms
with
tissue-mimicking
properties
play
a
crucial
role
in
the
calibration
of
medical
imaging
modalities,
including
Magnetic
Resonance
Imaging
(MRI).
Among
these
phantoms,
silicone-based
ones
are
widely
used
due
to
their
long-term
stability
MR
imaging.
Most
phantoms
manufactured
using
traditional
pour-mold
techniques
which
often
result
production
air
bubbles
that
can
damage
phantom.
This
research
investigates
feasibility
utilizing
extrusion
fabricate
silicone
and
explores
effects
parameters
plunger
speed
nozzle
diameter
on
void
content,
T1
T2
relaxation
times,
dielectric
properties.
A
custom
double-syringe
apparatus
was
developed
prepare
samples.
The
relaxometry,
extruded
samples
were
measured
compared
poured
results
show
affect
content
presence
voids
resulted
lower
values,
indicating
an
inverse
relationship
between
relaxometry.
study
demonstrates
potential
for
manufacturing
reduced
bubble
formation
provides
valuable
insights
into
phantom
Язык: Английский