Christopher Carignan, Wei-rong Chen, Muawiyath Shujau, Catherine T. Best, and I recently published an article about our new 3D-printable ultrasound transducer stabilizer (probe holder). 

Ultrasound tongue imaging of speech requires the imaging probe to remain stable throughout data collection. Previous solutions to this stabilization problem have often been too cumbersome and/or expensive for wide-spread use. Our solution improves upon previous designs in both functionality and comfort, while also representing the first free and open-source 3D printable headset for both academic and clinical applications of ultrasound tongue imaging.

The non-metallic design permits the simultaneous collection of ultrasound and electromagnetic articulometry. For clinicians, the headset eliminates the need for holding the imaging probe manually, allowing them to interact with patients in an unencumbered way.

The printable materials we provided work for midsaggital imaging of the tongue using a few select ultrasound transducers like the Logiq E 8C-RS and the Telemed transducers for Articulate Instruments systems, but can be modified easily to allow for other probes, or for coronal tongue imaging.

The system costs from $200 (for a 100 micron print) to $600 USD (for a 20 micron print) in materials to produce, making it quite affordable.  It is also very comfortable compared to most stabilization systems, and is accurate to within about 2mm of motion in any direction, and 2 degrees of rotation in any direction.  More details can be found in the article documenting the system.

Here is an image of the system, fully assembled and worn:

Transducer stabilizer