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. 2016 Nov 30;5:16070. doi: 10.1038/mtm.2016.70

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Copyright © 2016 Official journal of the American Society of Gene & Cell Therapy

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/

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Identification of common ultrasound artifacts and obstructions. (a) 2D transverse ultrasound image of the mid colon depicting a tumor (green arrow), feces (yellow arrow), and bubbles in the ultrasound gel (white arrows). (b) Color-Doppler overlay showing presence of blood flow in the tumor (green arrow) but absence of blood flow in the feces (yellow arrow). Also note the appearance of a shadow effect below the feces that does not appear below the tumor. (c) Example transverse ultrasound image frame of female mouse while 3D Motor passes over the area of the vagina and pelvic bridge. (d) Example transverse image frame of male mouse while 3D Motor passes over the area of the penis/sheath and pelvic bridge.