Ultrasound transcranial radiofrequency lines gathered using ex vivo human skulls. Misalignment of the peak amplitude of an ADV point beacon due to aberration (top) was corrected using time-reversal focusing (bottom). Reprinted from Ultrasound in Medicine & Biology, Vol. 34, Haworth KJ, Fowlkes JB, Carson PL, Kripfgans OD, “Towards aberration correction of transcranial ultrasound using acoustic droplet vaporization”, 435–45 (2008), with permission from Elsevier.