Multi-mode reverse time migration damage imaging using ultrasonic guided waves

•The aim of the present work is to develop a multi-mode imaging technique that will allow for identification of damage size and location using ultrasonic guided waves.•The proposed technique combines a reverse-time migration (RTM) imaging algorithm with a 3D wave propagation simulator using different wave modes.•This combination enables the separation of multiple modes using the wavefield filtering techniques, potentially providing more information to damage types.•Without the limitation of generating single dominant mode waves, wide frequency ranges are accessible, enabling optimal frequencies for a variety of ultrasonic data acquisition systems.