Machine learning-based prediction of motor status in glioma patients using diffusion MRI metrics along the corticospinal tract

Loading...
Thumbnail Image
Access rights
openAccess
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2022-05-02
Major/Subject
Mcode
Degree programme
Language
en
Pages
17
1-17
Series
Brain Communications, Volume 4, issue 3
Abstract
Shams et al. report that glioma patients' motor status is predicted accurately by diffusion MRI metrics along the corticospinal tract based on support vector machine method, reaching an overall accuracy of 77%. They show that these metrics are more effective than demographic and clinical variables. Along tract statistics enables white matter characterization using various diffusion MRI metrics. These diffusion models reveal detailed insights into white matter microstructural changes with development, pathology and function. Here, we aim at assessing the clinical utility of diffusion MRI metrics along the corticospinal tract, investigating whether motor glioma patients can be classified with respect to their motor status. We retrospectively included 116 brain tumour patients suffering from either left or right supratentorial, unilateral World Health Organization Grades II, III and IV gliomas with a mean age of 53.51 +/- 16.32 years. Around 37% of patients presented with preoperative motor function deficits according to the Medical Research Council scale. At group level comparison, the highest non-overlapping diffusion MRI differences were detected in the superior portion of the tracts' profiles. Fractional anisotropy and fibre density decrease, apparent diffusion coefficient axial diffusivity and radial diffusivity increase. To predict motor deficits, we developed a method based on a support vector machine using histogram-based features of diffusion MRI tract profiles (e.g. mean, standard deviation, kurtosis and skewness), following a recursive feature elimination method. Our model achieved high performance (74% sensitivity, 75% specificity, 74% overall accuracy and 77% area under the curve). We found that apparent diffusion coefficient, fractional anisotropy and radial diffusivity contributed more than other features to the model. Incorporating the patient demographics and clinical features such as age, tumour World Health Organization grade, tumour location, gender and resting motor threshold did not affect the model's performance, revealing that these features were not as effective as microstructural measures. These results shed light on the potential patterns of tumour-related microstructural white matter changes in the prediction of functional deficits.
Description
Keywords
machine learning, support vector machine, tractography, diffusion MRI, corticospinal tract, CONSTRAINED SPHERICAL DECONVOLUTION, WHITE-MATTER MICROSTRUCTURE, FRACTIONAL ANISOTROPY, FIBER DENSITY, TRACTOGRAPHY, SELECTION, COMPLEX, IMAGES, TISSUE, DTI
Other note
Citation
Shams, B, Wang, Z, Roine, T, Aydogan, D B, Vajkoczy, P, Lippert, C, Picht, T & Fekonja, L S 2022, ' Machine learning-based prediction of motor status in glioma patients using diffusion MRI metrics along the corticospinal tract ', Brain Communications, vol. 4, no. 3, 141, pp. 1-17 . https://doi.org/10.1093/braincomms/fcac141