Precautions; Limitations; Image Artifact - Boston Scientific ImageReady MRI Mode D'emploi

External Devices: External components (i.e., External Trial Stimulator and OR Cables) are MR Unsafe.
They must not be taken into any MR environment such as the MRI Scanner Room.
Supervision: A person with expert knowledge about MRI must ensure all procedures in this manual are
followed and that the MRI scan parameters during both the prescan and the actual MRI examination are
within the recommended settings listed in this manual.

Precautions

Explant of DBS lead extensions and Stimulator for MRI: The MR conditional system is comprised of a
booted leads system consisting of the components listed in Table 1. The risk of explant to create an MR
conditional configuration outlined in this manual should be evaluated by a health care professional.

Limitations

An MRI can also be performed safely if, instead of the burr hole cover, a metal mini plate with screws
used to secure the DBS leads to the skull. Boston Scientific has not evaluated the effect of other implanted
devices in combination with or in proximity to the Boston Scientific System described in this manual.
Boston Scientific does not recommend an MRI scan if other implanted devices are present.

Image Artifact

Artifacts and distortions may be produced in the MR image by any DBS system components. Users must
be aware of these when selecting imaging parameters or interpreting MR images. Careful selection of
pulse sequence parameters, and location of the imaging plane may minimize MR image artifacts. Although
reduction of image distortion can be obtained by adjusting pulse sequence, this may compromise signal-to-
noise ratio. The following guidelines will help minimize image artifacts and distortions:
• Use a local receive-only coil instead of a body receive coil whenever possible.
• Use imaging sequences with stronger gradients for both slice and read encoding directions.
• Use a higher bandwidth for radio-frequency pulse and data sampling.
• Select an orientation for the read-out axis that minimizes the in-plane distortion.
• Use a shorter echo time for gradient echo technique, whenever possible.
3 Similar to a Stryker 12 mm titanium mini plate with Stryker titanium screws.
ImageReady™ MRI Guidelines for Boston Scientific Deep Brain Stimulation Systems
MR Conditional System Description
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