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Acta Radiol. 2016 Jan;57(1):82-9. doi: 10.1177/0284185114562992. Epub 2014 Dec 18.

Presurgical functional magnetic resonance imaging in patients with brain tumors.

Author information

1
Department of Radiology, Aalborg University Hospital, Denmark Department of Clinical Medicine Aarhus University, Denmark sorl@rn.dk.
2
Department of Oncology, Aalborg University Hospital, Denmark.
3
Department of Neurosurgery, Aalborg University Hospital, Denmark.
4
Department of Radiology, Aalborg University Hospital, Denmark Department of Clinical Medicine Aarhus University, Denmark.
5
Department of Clinical Medicine Aarhus University, Denmark Department of Medical Physics, Aalborg University Hospital, Denmark.

Abstract

BACKGROUND:

Clinical functional magnetic resonance imaging (fMRI) is still an upcoming diagnostic tool because it is time-consuming to perform the post-scan calculations and interpretations. A standardized and easily used method for the clinical assessment of fMRI scans could decrease the workload and make fMRI more attractive for clinical use.

PURPOSE:

To evaluate a standardized clinical approach for distance measurement between benign brain tumors and eloquent cortex in terms of the ability to predict pre- and postoperative neurological deficits after intraoperative neuronavigation-assisted surgery.

MATERIAL AND METHODS:

A retrospective study of 34 patients. The fMRI data were reanalyzed using a standardized distance measurement procedure combining data from both fMRI and three-dimensional T1 MRI scans. The pre- and postoperative neurological status of each patient was obtained from hospital records. Data analysis was performed using logistic regression analysis to determine whether the distance measured between the tumor margin and fMRI activity could serve as a predictor for neurological deficits.

RESULTS:

An odds ratio of 0.89 mm(-1) (P = 0.03) was found between the risk of preoperative neurological motor deficits and the tumor-fMRI distance. An odds ratio of 0.82 mm(-1) (P = 0.04) was found between the risk of additional postoperative neurological motor deficits and the tumor-fMRI distance. The tumor was radically removed in 10 cases; five patients experienced additional postoperative motor deficits (tumor-fMRI distance <18 mm) and five did not (tumor-fMRI distance >18 mm) (P = 0.008).

CONCLUSION:

This study indicates that the distance measured between the tumor margin and fMRI activation could serve as a valuable predictor of neurological motor deficits.

KEYWORDS:

CNS; Functional magnetic resonance imaging (fMRI); brain; surgery

PMID:
25523064
DOI:
10.1177/0284185114562992
[Indexed for MEDLINE]

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