Multimodal optical ultrasound imaging: Real-time imaging under concurrent CT or MRI
APL Photonics,
Год журнала:
2024,
Номер
9(9)
Опубликована: Сен. 1, 2024
Optical
ultrasound
(OpUS)
imaging
is
an
modality
that
utilizes
fiber-optic
sources
and
detectors
to
perform
pulse-echo
imaging.
These
probes
can
be
constructed
entirely
from
glass
optical
fibers
plastic
components,
as
such,
these
devices
have
been
predicted
compatible
with
computed
tomography
(CT)
magnetic
resonance
(MRI),
modalities
use
intense
electromagnetic
fields
for
However,
date,
this
compatibility
has
not
demonstrated.
In
work,
a
free-hand
OpUS
system
was
developed
specifically
investigate
the
of
systems
CT
MRI
systems.
The
platform
discussed
in
work
used
real-time
under
(separately)
concurrent
MRI.
probe
determine
if
itself
would
induce
artifacts
imaging,
resolution
targets
background
measurements
were
assess
any
impact
on
signal
fidelity.
demonstrate
there
negligible
interaction
between
both
systems,
further
capability,
OpUS-CT
OpUS-MRI
conducted
tissue-mimicking
phantom
dynamic
motion
phantom.
This
presents
comprehensive
demonstration
operating
alongside
MRI,
which
opens
up
new
applications
electromagnetically
challenging
settings.
Язык: Английский
Effect of Magnetic Resonance Imaging on the Motion Accuracy of Magnetic Resonance Imaging-compatible Focused Ultrasound Robotic System
Journal of Medical Physics,
Год журнала:
2024,
Номер
49(2), С. 203 - 212
Опубликована: Апрель 1, 2024
Purpose:
The
current
study
provides
insights
into
the
challenges
of
safely
operating
a
magnetic
resonance
imaging
(MRI)-guided
focused
ultrasound
(MRgFUS)
robotic
system
in
high-field
MRI
scanner
terms
motion
accuracy.
Materials
and
Methods:
Grid
sonications
were
carried
out
phantoms
excised
porcine
tissue
3T
using
an
existing
MRgFUS
system.
Fast
low-angle
shot-based
thermometry
was
employed
for
intraprocedural
monitoring
thermal
distribution.
Results:
Strong
shifting
heated
spots
from
intended
points
observed
owing
to
electromagnetic
interference
(EMI)-induced
malfunctions
system’s
operation.
Increasing
slice
thickness
sequence
at
least
8
mm
proven
efficient
method
preserving
Conclusions:
These
findings
raise
awareness
about
EMI
effects
on
accuracy
devices
how
they
can
be
mitigated
by
employing
suitable
parameters.
Язык: Английский