{"first_sentence": {"type": "/type/text", "value": "Ultrasound consists of mechanical sound waves whose frequencies are above the audible range, that is, 20,000 Hz (Hz stands for the number of wave cycles per second)."}, "physical_format": "Hardcover", "subtitle": "A Perioperative Transdisciplinary Approach", "weight": "4.3 pounds", "languages": [{"key": "/l/eng"}], "type": {"key": "/type/edition"}, "publishers": ["Informa Healthcare"], "number_of_pages": 616, "isbn_13": ["9780824723538"], "id": 11010034, "edition_name": "Har/Cdr edition", "isbn_10": ["0824723538"], "publish_date": "August 23, 2005", "key": "/b/OL8125275M", "last_modified": {"type": "/type/datetime", "value": "2008-04-29 15:03:11.581851"}, "title": "Transesophageal Echocardiography Multimedia Manual", "contributions": ["Andre Y. Denault (Editor)", "Pierre Couture (Editor)", "Jean Buithieu (Editor)", "Jean-Claude Tardif (Editor)"], "subjects": ["Medicine: General Issues", "Image Interpretation, Computer-Assisted", "Anesthesiology", "Medical / Nursing", "instrumentation", "Medical", "Transesophageal echocardiography", "Cardiology", "Medical / Anesthesiology", "Echocardiography, Transesophageal"], "physical_dimensions": "11.3 x 8.5 x 1.1 inches", "revision": 1}