Volume 39, Issue 6 pp. 1357-1365
Review Article

3 Tesla intraoperative MRI for brain tumor surgery

Daniel Thomas Ginat MD, MS

Corresponding Author

Daniel Thomas Ginat MD, MS

Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA

Address reprint requests to: D.T.G., 55 Fruit Street, Boston, MA 02114. E-mail: [email protected]Search for more papers by this author
Brooke Swearingen MD

Brooke Swearingen MD

Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA

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William Curry MD

William Curry MD

Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA

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Daniel Cahill MD

Daniel Cahill MD

Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA

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Joseph Madsen MD

Joseph Madsen MD

Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA

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Pamela W. Schaefer MD

Pamela W. Schaefer MD

Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA

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First published: 29 October 2013
Citations: 48

Abstract

Implementation of intraoperative magnetic resonance imaging (iMRI) has been shown to optimize the extent of resection and safety of brain tumor surgery. In addition, iMRI can help account for the phenomenon of brain shift and can help to detect complications earlier than routine postoperative imaging, which can potentially improve patient outcome. The higher signal-to-noise ratio offered by 3 Tesla (T) iMRI compared with lower field strength systems is particularly advantageous. The purpose of this article is to review the imaging protocols, imaging findings, and technical considerations related to 3T iMRI. To maximize efficiency, iMRI sequences can be tailored to particular types of tumors and procedures, including nonenhancing brain tumor surgery, enhancing brain tumor surgery, transsphenoidal pituitary tumor surgery, and laser ablation. Unique imaging findings on iMRI include the presence of surgically induced enhancement, which can be a potential confounder for residual enhancing tumor, and hyperacute hemorrhage, which tends to have intermediate signal on T1-weighted sequences and high signal on T2-weighted sequences due to the presence of oxyhemoglobin. MR compatibility and radiofrequency shielding pose particularly stringent technical constraints at 3T and influence the design and usage of the surgical suite with iMRI. J. Magn. Reson. Imaging 2014;39:1357–1365. © 2013 Wiley Periodicals, Inc.

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