Electrical field measurements and simulations of the H7 and D-B80 coils: Non-equivalence of the TMS coils for obsessive compulsive disorder

M Tzirini, Y Roth, T Harmelech, S Zibman… - … Clinical Research in …, 2021 - brainstimjrnl.com
In 2018, the FDA cleared deep transcranial magnetic stimulation (dTMS) with the H7 coil for
obsessive-compulsive disorder (OCD) treatment following a successful pilot randomized-
controlled trial (RCT)[1] and a subsequent double-blinded placebo-controlled (DBPC)
multicenter trial [2]. Two years later, TMS with the D-B80 coil was also FDA-cleared for the
same indication on the basis of claimed substantial equivalence. While both coils appear to
be bent figure-8 coils, they differ in diameter of their circular wings and distance between the …