New 3D Visualization Features

In the past months the MNE-CPP team has been improving the disp3D library and adding new features for better data visualization. The recent release of Qt 5.7 brought much anticipated updates and new modules into the field. QtCharts module was implemented for data analysis in the form of distribution histogram. This will show the distribution of EEG and MEG data. In addition, users will now be able to effortlessly hide unwanted activation and set color map gradients.

The images above show the different brain models (orig, pial, and inflated) with visualization typed and the aforementioned threshold feature. New boundary element method (BEM) models include high and low resolution head, skull, and cranial cavity to enhance user’s observation of the human head with adjustable transparency and color. Translation allows adjustment of the brain in the X, Y, and Z- axis; in conjunction with full screen and rotate, this will improve video and screenshot creation.

The video below demonstrates these new features in real time. The first part focuses on annotation-based activation of the brain when given right auditory stimulus. Activation in the auditory cortex can be easily seen once the correct thresholding has been selected. The second part of the video shows multi-inflated brain display using the translation feature. The stimulus used is visual and clear activation can be seen in the visual cortex of the opposite side to the stimulus.

We have been constantly expanding and enhancing the Disp3D library to deliver the best possible real time visualization of EEG and MEG data. There have been major strides and the team is hard at work towards the full version release.