Imaging results with traditional methods (IMAGE) Johns Hopkins University Caption Comparison of photoacoustic images from two volunteers, where imaging through darker skin shows more signal clutter obscuring arteries than through light skin. Credit Johns Hopkins University/ University of São Paulo, Brazil. 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.