Radiology Conditions - Boston Scientific ImageReady MRI Mode D'emploi

Radiology Conditions

Boston Scientific Systems that are eligible for Full Body Conditional MR scans must be scanned under the
following conditions:
1. MRI system conditions
a. 1.5 Tesla (T) horizontal closed bore systems only. Do not use systems that are open-
sided, vertical-field, or are operating at other static magnetic field strengths, the risks of
using these MRI systems have not been determined and could be significant.
b. Gradient systems with a maximum gradient slew rate per axis less than or equal to
200 T/m/s.
c. Maximum spatial field gradient less than or equal to 40 T/m (4000 gauss/cm)
d. Scan sequence throughout the scan must have
B1+rms less than or equal to (≤) 2.0 µT
If B1+rms is not available then scan sequence must have
Whole body and head SAR less than or equal to (≤) 0.1 W/kg
Note: Using the SAR
Warning: Apply the required B1+rms (or SAR) limit in the Normal Operating Mode. Do not
e. Cumulative active scan time (with RF On) should be limited to 30 minutes or less per
imaging session. If 30 mins of active scan time is reached allow 60 mins of non-active
time before proceeding.
2. MRI coil setup:
a. Transmit coil: 1.5T Full Body transmit/receive or Head transmit/receive, RF quadrature
only.
b. Receive-only coil: Any type.
c. Hydrogen/proton imaging only.
3. Patient status and positioning:
a. The patient is in supine or prone position only.
b. The patient must have continuous audio/visual monitoring during the MRI.
1 Specific Absorption Rate (SAR)– radio frequency power absorbed per unit of mass (W/kg).
2 RF Quadrature coil– RF Quadrature Coils produce an RF field with circular polarization perpendicular to the static magnetic field.
value may result in a more restrictive MRI scan.
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conduct MRI scans in the First Level and Second Level Controlled Operating
Modes as it may increase the risk of unintended stimulation and excessive
heating.
ImageReady™ MRI Guidelines for Boston Scientific Deep Brain Stimulation Systems
MR Conditional System Description
91098813-02 Rev C 3 of 277
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