I've been working on an ultrasound imaging project demanding high sensitivity on the ultrasound sensor. I'd welcome any information on the optimal type of sensor to use. The sensors are non-focused, broadband with center frequencies at 1MHz to 3MHz, immersion type (low acoustic impedance). I've had mixed results with commercial PZT based sensors(with acoustic matching).Do PVDF or composite sensors provide better sensitivity? Are they commercially available or can be custom made?
Han Wen, Ph.D. Laboratory of Cardiac Energetics National Institutes of Health Bethesda, MD 20892 Tel (301)496-2694 email firstname.lastname@example.org