Intrauterine devices (IUDs) Intrauterine devices (IUDs). The coronal planes of 3-dimensional sonography best depict the type and positioning of the Copper T 380A IUD (ParaGard) (A) and levonorgestrel-releasing IUD (Mirena) (B) IUDs within the endometrial cavity. Source: Techniques Used for Imaging in Gynecology, Williams Gynecology, 3e Citation: Hoffman BL, Schorge JO, Bradshaw KD, Halvorson LM, Schaffer JI, Corton MM. Williams Gynecology, 3e; 2016 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/1758/p9780071849081-ch002_f011.png&sec=118166779&BookID=1758&ChapterSecID=118166717&imagename= Accessed: November 15, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved