Intrauterine devices. The coronal planes of 3-dimensional sonography best depict the type and positioning of the Copper T 380A IUD (ParaGard) (A) and levonorgestrel-containing IUD (Mirena) (B) intrauterine devices within the endometrial cavity. Source: Chapter 2. Techniques Used for Imaging in Gynecology, Williams Gynecology, 2e Citation: Hoffman BL, Schorge JO, Schaffer JI, Halvorson LM, Bradshaw KD, Cunningham F, Calver LE. Williams Gynecology, 2e; 2012 Available at: https://obgyn.mhmedical.com/DownloadImage.aspx?image=/data/books/hoff2/hoff2_c002f025.png&sec=41722670&BookID=399&ChapterSecID=41722290&imagename= Accessed: November 09, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved