Resonance Sonomanometry Human Data (IMAGE) California Institute of Technology Caption This graphic shows carotid placement of the Esperto sensor and ultrasound imagery (central) as gathered by the device. Resonance sonomanometry human data (right) shows arterial waveforms from the Esperto device compared to an arterial catheter, including blood pressure, resonance frequency, and arterial radius. Credit Esperto Medical Usage Restrictions none License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.