Ultrasound Localization Microscopy
Ultrasound Localization Microscopy (ULM) is an advanced ultrasound technique used for animal and human imaging. By localizing microbubbles, ULM overcomes the physical limit of diffraction, achieving sub-wavelength level resolution and qualifying as a super-resolution technique.
Source: Wikipedia — Ultrasound Localization Microscopy (CC BY-SA 4.0)