Monteris Medical Neuroblate, Instructions For Use Manual

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NeuroBlate® System Instructions for Use
80469 Rev D – Nov 16, 2018
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WARNING: Failure to allow all heated tissue to return to baseline temperature prior to
stopping MR acquisition may result in inaccurate calculation of thermal dose levels which
may lead to patient injury. Maintain MRI acquisition (which ensures internal probe cooling)
to allow tissue next to the probe to cool to the baseline temperature which may require up
to 120 seconds. Tissue further away from the probe may take longer to return to baseline
temperature. The Pixel Temperature Query tool and the temperature map can be used to
monitor all tissue.
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To continue treatment at a new linear position, user must stop the MRI acquisition and
select Stop Acquisition in M*Vision.
CAUTION: It is recommended that to stop thermal acquisition on Siemens MRI, first
stop the scan on the MR console and then stop acquisition receipt on M*Vision (i.e.
Select “Stop Acquisition” on M*Vision) in this order.
Confirming Probe Position: MR imaging may be used to confirm that the actual probe linear
position within the tissue aligns to the software rendered target probe position following
any translation of probe position. Acquire new MR images either parallel to the probe,
transfer to M*Vision and load into the views to confirm actual position within the tissue.
Again, Turbo Spin Echo (or Spin Echo) sequences are optimal for minimal probe artifact
distortion and, if possible, with the frequency encode direction anti-parallel to the probe.
These type of scans used to evaluate the probe position within the tissue should be
executed on the MRI only when linear or rotary probe motion is NOT active. The image
below illustrates the appearance of the probe artifact in a T2W TSE pulse sequence.
Figure 8.8.3.34: Pixel Temperature Query