How big should the knowledge be for small nerve ultrasound?

At an astonishingly fast pace technical advances are pushing the limits of diagnostic ultrasound. Machines with increasingly higher resolution show us tiny structures we have never thought we could see or even scan for pathologies. Very sensitive color doppler methods show us intraneural vascularization patterns. Strong postprocessing algorithms allow us to modify the image and thus potentially enhance our perception. Although some technical advances fall short of great initial expectations ultrasound images have improved a lot.