#$%^&*AU2018201223A120180913.pdf#####ABSTRACT An apparatus includes a probe having a lumen and a first inflatable transparent balloon deployable through 5 the lumen. The first balloon is coupled to be filled with liquid. The apparatus includes a second inflatable transparent balloon, deployable through the lumen, and disposed inside the first inflatable balloon between a proximal side and a distal side of the first inflatable 10 balloon. The second balloon is coupled to be filled with air. The apparatus also includes a camera deployable through the lumen between a proximal side and a distal side of the second inflatable balloon and configured to capture an optical image formed through the first and 15 second inflatable balloons.3/5 C4 0-) Co CI4 ?o CN CI4 CD 14 C) C) j::: QO co CD 00 00 LL. 00 0) CI4 C-4 CY) CN CD CN CN C-4 CI4 FI4
