{
  "$type": "site.standard.document",
  "description": "A method and apparatus for ultrasonic contact imaging. A thin-film transistor (TFT) array (225) is deposited on a substrate (210). A receiver (220) having a plurality of receiver elements is deposited on the TFT array (225) to receive a received signal. A transmitter (240) adjacent to the receiver…",
  "path": "/patents/991863",
  "publishedAt": "2013-04-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B06B1/02",
    "PALO ALTO RES CT INC [US]"
  ],
  "textContent": "A method and apparatus for ultrasonic contact imaging. A thin-film transistor (TFT) array (225) is deposited on a substrate (210). A receiver (220) having a plurality of receiver elements is deposited on the TFT array (225) to receive a received signal. A transmitter (240) adjacent to the receiver (220) generates a transmit signal at an ultrasonic frequency. The transmit signal is reflected from a surface to produce a reflected signal. The received signal is a superposition of the transmit signal and the reflected signal as result of interference. The received signal is representative of differences in acoustic impedances across the surface.",
  "title": "Large-area ultrasound contact imaging"
}