Presurgical functional magnetic resonance imaging in patients with brain tumors

• Published in: Acta radiologica (1987) 2016-01, Vol.57 (1), p.82-89
• Main Authors: Ravn, Søren, Holmberg, Mats, Sørensen, Preben, Frokjaer, Jens B, Carl, Jesper
• Format: Article
• Language: English
• Subjects: Activation; Adolescent; Adult; Aged; Brain; Brain Neoplasms - pathology; Brain Neoplasms - surgery; Child; Female; Humans; Imaging, Three-Dimensional; Magnetic resonance imaging; Magnetic Resonance Imaging - methods; Male; Middle Aged; Motors; Patients; Predictive Value of Tests; Preoperative Period; Retrospective Studies; Risk; Three dimensional; Tumors
• ISSN: 0284-1851; 1600-0455
• DOI: 10.1177/0284185114562992

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) (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.