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. 2015 Apr 9;10:82. doi: 10.1186/s13014-015-0380-1

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© Li et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Elekta Clarity ™ system for transabdominal 3D ultrasound: mobile bedside workstation (left), free-hand probe with infrared reflectors (middle), and ceiling-mounted stereoscopic infrared camera (right, two arrows).