They combined conventional PET imaging, which requires a radioactive tracer to highlight the brain's metabolic activity, with other recent advances in the genetic engineering of brain cells that allows them to target specific brain circuits in lab animals.
Women were limited from most high-end professions and most of the elite educational institutions, and sexism of a sort we have a hard time imaging these days was perfectly conventional.
CDM's imaging system, it passes first through conventional optical elements, and then through a lens moulded into a shape of a cubic-like function (ie, with a surface which, instead of being spherical, is relatively flat in the centre but has scalloped edges).