3D printer molds for head phantom shapes

Mold shapes for casting gelatine into a head shape for creating head phantoms as used in:
- S. Kohli and A. J. Casson, “Removal of gross artifacts of transcranial alternating current stimulation in simultaneous EEG monitoring,” Sensors, vol. 19, no. 190, pp. 1–23, 2019.
- S. Kohli and A. J. Casson, “Towards close-loop tES: Workload monitoring during tACS stimulation,” Brain Stimulation, vol. 10, no. 4, pp. e28–e29, 2017.
- S. Kohli, S. Krachunov and A. J. Casson, “Towards closed-loop transcranial Electrical Stimulation: a comparison of methods for real time tES-EEG artefact removal using a phantom head model,” Brain Stimulation, vol. 10, no. 2, pp. 467–468, 2017.
- S. Kohli and A. J. Casson, “Towards signal processing assisted hardware for continuous in-band electrode impedance monitoring,” IEEE International Symposium on Circuits and Systems, Baltimore, May 2017.

Head shape is based upon a human dummy used for automotive testing, with source https://grabcad.com/library/mannequin-1. This has been hollowed out so that it can be filled with gelatine to get the wanted shape.

The mold is broken down into 7 pieces, each small enough to be produced on a desktop sized 3D printer. These should be printed, and then a Silicone seal used to to have a water tight connection between the different parts, before filling with gelatine. We usually print in PLA, but a flexible filament could be used to help with easy removal. If you have a larger printer, the pieces could be combined (the best option is to have just two pieces to print and seal together as this will minimize leaks from the seal.)