Supervision
Patient interaction during MRI – limit the
amount of sedation to the patient so that the
patient can provide feedback of any problems
during the examination.
Monitor the patient during the MRI
examination. Verify that the patient is
feeling normal and is responsive during and
between each individual scan sequence
of the MRI examination. Discontinue the
MRI immediately if the patient becomes
unresponsive to questions or experiences
any heating, pain, shocking sensations/
uncomfortable stimulation, or unusual
sensations.
Prior to the MRI examination, an individual
with the proper knowledge of MRI equipment
such as an MRI-trained radiologist or MRI
physicist must ensure the MRI examination
will be conducted according to the information
outlined in this document.
Note: Due to the additional requirements in
these instructions, MRI examination
time may be significantly extended.
MRI Exposure Requirements
Prior to an MRI examination, determine
whether the patient has another active
or passive medical implant. If the patient
has any other active or passive medical
implant from a manufacturer that prohibits or
contraindicates an MRI examination then you
should NOT conduct an MRI examination.
The instructions in this document apply
only to Boston Scientific products described
herein.
If the following requirements cannot be met,
do NOT proceed with the MRI examination.
• Use only a transmit/receive RF head
coil.
• Important Note: If you are
unsure if your MRI system has
a transmit/receive RF head coil
capability or if you are unsure if
your MRI system displays "head
SAR", check with your MRI
system manufacturer.
• No component of the Precision
System (i.e. the implanted leads, IPG,
etc) extends into the head coil.
• Use only a 1.5 Tesla, horizontal bore
MRI system (i.e., do not use open-
sided or MRI systems operating at
other static magnetic field strengths).
• Enter the correct patient weight into
the MRI console to ensure that the
head SAR level is estimated correctly
by the MRI system.
• The MRI pulse sequence parameters
must meet the following requirements.
If they do not, the parameters must
be adjusted so that they comply with
these requirements.
• Use MRI examination pulse
sequence parameters that limit
the MRI system-reported head
SAR level to 1.5 W/kg or less for
all sequences.
• Ensure dB/dt is limited to no
more than 20 Tesla per second.
9055959-008 Rev A 67 of 327
Appendix A
Clinician Manual