 Using functional magnetic resonance imaging (fMRI), they found that when shown erotica, the cisgender men responded in several brain regions that the cisgender women did not, and that the sample of androphilic transsexuals was shifted towards the female direction in brain responses.In another study, Rametti and colleagues used diffusion tensor imaging (DTI) to compare 18 androphilic male-to-female transsexuals with 19 gynephilic males and 19 androphilic cisgender females.The androphilic transsexuals differed from both control groups in multiple brain areas, including the superior longitudinal fasciculus, the right anterior cingulum, the right forceps minor, and the right corticospinal tract.