2011 Summer Project Week Intraoperative Brain Shift Monitor

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  Projects List

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  Fig. 1: Registration of Ultrasound Trajectory with MRI

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  Fig. 2: ITUM Research Platform

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  Fig. 3: Slicer with ITUM Data And MRI

Intraoperative Brain Shift Monitor

Key Investigators

• BWH/HMS: Jason White, Alex Golby, and Steve Pieper

Objective

Real-time ultrasound data is used to track the shifting of intracranial anatomy during neurosurgery. This is accomplished with a stationary ultrasound probe that is mounted away from the surgical site, and operates transcranially so as to be completely unobtrusive to surgical activities. Coordinating the use of this device with Slicer and BrainLab:

1. Registering the data obtained from it with pre-op images (MRI, CT, etc.) (Fig. 1)
2. Using this data to modify/deform the pre-op images in order to maintain a more accurate representation of intraoperative anatomy.

Approach, Plan

Progress

One-dimensional object-tracking data generated by the ITUM was ported to Slicer via IGTLink. Both the data and its associated spatial transform was transferred and displayed at a high temporal resolution (for this application, "high temporal resolution" is approximately 6 Hz).

References

P.J. White, S. Whalen, S.C. Tang, G.T. Clement, F.A. Jolesz, and A. Golby, “An Intraoperative Brain-shift Monitor Using Shear-mode Transcranial Ultrasound: Preliminary Results” Journal of Ultrasound in Medicine 2009; 28 191-203.

Delivery Mechanism