| abstract |
An ultrasonic camera having a high efficiency ultrasonic lens (2216, 2218) is coupled to an ultrasonic transmitter/receiver (2600) by a stretched membrane interface (2318). The ultrasonic lens (2216, 2218) provides highly efficient transmission of ultrasound without introducing aberrations. The ultrasound system (2230) also uses a quasi incoherent source (2604, 2608) to reduce speckle noise in the image. |