She collaborated with staff at the University of California, San Diego to develop models to understand changes in blood flow and oxygenation during neural activation.

[8] She completed her doctoral research at Stanford University, where she was supervised by John M. Pauly and worked on steady-state neuroimaging.

[9] In 2007 Miller was appointed a research lecturer at the University of Oxford and subsequently promoted to Professor of Biomedical Engineering in 2014.

In particular, she is interested in developing techniques for understanding neural microstructure, which she achieves using a combination of MRI with light and electron microscopy.

[12] She leads equality, diversity, and inclusion (EDI) work for the medical sciences division at the University of Oxford.