Abstract #0867
Integration of Active MR Tracking into Adaptive Radiation Therapy Treatment Planning
Wei Wang 1,2 , Akila N Viswanathan 2 , Antonio L Damato 2 , Zion T Tse 3 , Yue Chen 3 , Ravi T Seethamraju 4 , Clare M Tempany 1 , Robert A Cormack 2 , and Ehud J Schmidt 1
1
Radiology, Brigham and Womens Hospital,
Harvard Medical School, Boston, MA, United States,
2
Radiation
Oncology, Brigham and Womens Hospital, Harvard Medical
School, Boston, MA, United States,
3
The
University of Georgia, GA, United States,
4
MR
R&D, Siemens Healthcare, MA, United States
In interstitial brachytherapy, catheters are normally
inserted into the tumor under MRI guidance. Due to the
inaccuracy of MRI catheter visualization, CT is required
after placement to localize catheters for treatment
planning. We propose an adaptive radiation treatment
planning process based entirely on MRI, using catheter
trajectories generated by an active MR-tracking system
specifically developed for fast and accurate
localization of metallic catheters. This provides
intra-operative dosimetric feedback to clinicians during
catheter implantation, which allows for adaptive
repositioning or addition of catheters. It will improve
tumor coverage, reduce toxicity to normal tissues and
potentially eliminate the need for subsequent CT.
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