Users'guidefortheFieldIIprogramThisistheuserguidefortheversion3.20ofNovember19,2010oftheFieldIIprogram.ThisversionoftheprogramrunsunderMatlab7andcansimulateallkindsultrasoundtransducersandtheassociatedimages.Thefocusingandapodizationofthetransducerscanbecontrolleddynamicall