Renaud develops nonlinear and single-sided ultrasound methods to characterize bone and vascular tissue in vivo — quantifying cortical bone porosity, blood-flow, and microbubble/microcrack acoustic signatures — and collaborates closely with David Maresca's functional-ultrasound group on transcranial aberration-corrected Doppler imaging of the brain. This acoustic biosensing work extends the lab's push toward higher-sensitivity, non-invasive acoustic biomarkers analogous in spirit to other quantum-adjacent biosensing modalities.