Using 3D-printers, we product flexible head caps with built in grommets capable of holding common fNIRS optodes. The flexible material holds sensors flush and stable on the scalp. To support custom probe design, we take an AtlasViewer probe configuration file and head circumference as input. By mapping the probe configuration onto the 2D printed panels, we produce a durable cap that ensures the consistent and desired probe configuration.
Please find instructions for how to design a NinjaCap on Atlas viewer here.