title: Implanon implant detection with ultrasound and magnetic resonance imaging.
abstract: OBJECTIVE
  The objective of the present study was to determine the degree of difficulty in locating Implanon (Organon, Sydney, Australia) contraceptive rods which had been inserted suboptimally, using both ultrasound and magnetic resonance imaging (MRI).
  
  
  METHODS
  Volunteers with correctly placed Implanon rods were recruited for normal scanning protocols. A phantom was used to display abnormal rod placements. Ultrasound imaging was carried out using a variety of transducers to demonstrate their suitability. An MRI scanning protocol was formulated to achieve required views in the shortest time.
  
  
  RESULTS
  All Implanon rods were successfully imaged with both ultrasound and MRI.
  
  
  CONCLUSIONS
  High resolution linear array transducers combined with the correct scanning protocol should enable visualisation of Implanon rods in almost all cases. The MRI imaging requires caution when differentiating blood vessels and fibrous septae from the Implanon rods.
authors.affiliation: North Shore Obstetric and Gynaecologic Ulltrasound, North Shore Private Hospital, St Leonards, New South Wales, Australia. nsogus@ram.net.au
authors.forename: Susan Campbell
authors.initials: SC
authors.lastname: Westerway
authors.forename: Richard
authors.initials: R
authors.lastname: Picker
authors.forename: James
authors.initials: J
authors.lastname: Christie
mesh_terms: D017135:Desogestrel / Q000008:administration & dosage; D004343:Drug Implants / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D018482:Muscle, Skeletal / Q000000981:diagnostic imaging* / Q000473:pathology*; D045167:Progesterone Congeners / Q000008:administration & dosage; D012680:Sensitivity and Specificity; D040521:Subcutaneous Tissue / Q000000981:diagnostic imaging* / Q000473:pathology*; D014463:Ultrasonography
chemical_list: D004343:Drug Implants; D045167:Progesterone Congeners; C044815:etonogestrel; D017135:Desogestrel