Figure 2.

(Top) View of the MR-compatible cello and bow inside the scanner during experiment. (Bottom) Line drawing of cello and bow developed for use inside the MR Scanner. Cello fingerboard has the same dimensions as a fullsized cello to preserve the location and spacing of notes. Optic sensors at the bridge are used to detect string vibrations, and are converted to analog audio output by a custom ARM board (not shown). The MR Compatible bow is 20 cm long, which is just under a third of the length of a typical cello bow (approximately 70 cm).