Samantha Cristoforetti (2 of 2) (IMAGE) NASA/Johnson Space Center Caption This image shows training of Samantha Cristoforetti with high resolution vascular ultrasound images directed by PI Paolo Zamboni, MD. This system, synchronized with ECG, was used in flight to implement the plethysmography data. Credit Paolo Zamboni, MD Usage Restrictions None License Licensed 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.