Abstract |
In this paper, an efficient paradigm is presented to correct for brain shift during tumor resection therapies. For this study, high resolution preoperative (pre-op) and postoperative (post-op) MR images were acquired for eight in vivo patients, and surface/subsurface shift was identified by manual identification of homologous points between the pre-op and immediate post-op tomograms. Cortical surface deformation data were then used to drive an inverse problem framework. The manually identified subsurface deformations served as a comparison toward validation. The proposed framework recaptured 85% of the mean subsurface shift. This translated to a subsurface shift error of 0.4 +/- 0.4 mm for a measured shift of 3.1 +/- 0.6 mm. The patient's pre-op tomograms were also deformed volumetrically using displacements predicted by the model. Results presented allow a preliminary evaluation of correction both quantitatively and visually. While intraoperative (intra-op) MR imaging data would be optimal, the extent of shift measured from pre- to post-op MR was comparable to clinical conditions. This study demonstrates the accuracy of the proposed framework in predicting full-volume displacements from sparse shift measurements. It also shows that the proposed framework can be extended and used to update pre-op images on a time scale that is compatible with surgery.
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Authors | Prashanth Dumpuri, Reid C Thompson, Aize Cao, Siyi Ding, Ishita Garg, Benoit M Dawant, Michael I Miga |
Journal | IEEE transactions on bio-medical engineering
(IEEE Trans Biomed Eng)
Vol. 57
Issue 6
Pg. 1285-96
(Jun 2010)
ISSN: 1558-2531 [Electronic] United States |
PMID | 20172796
(Publication Type: Journal Article, Research Support, N.I.H., Extramural)
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Topics |
- Algorithms
- Artifacts
- Brain Neoplasms
(pathology, surgery)
- Female
- Humans
- Image Enhancement
(methods)
- Image Interpretation, Computer-Assisted
(methods)
- Magnetic Resonance Imaging
(methods)
- Male
- Middle Aged
- Neurosurgical Procedures
(methods)
- Pattern Recognition, Automated
(methods)
- Postoperative Care
(methods)
- Preoperative Care
(methods)
- Reproducibility of Results
- Sensitivity and Specificity
- Subtraction Technique
- Surgery, Computer-Assisted
(methods)
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