title: Do measurements of uterine septum using three-dimensional ultrasound and magnetic resonance imaging agree?
abstract: OBJECTIVE
  To evaluate the agreement between measurements of uterine septum by 3-D ultrasound (3-D US) and magnetic resonance imaging.
  
  
  METHODS
  Fourteen women with a uterine septum underwent both a 3-D US and an MRI followed by hysteroscopic metroplasty in a tertiary care infertility clinic within a university teaching hospital. The agreement between 3-D US and MRI measurements of septum length (SL), septum width (SW) and the distance between fundal serosa and septal tip (SSD) was compared using the Bland Altman limit of agreement analysis.
  
  
  RESULTS
  3-D US correctly identified all women who had a uterine septum identified with MRI. The mean difference in SL was 2.7 mm (upper limit of agreement and lower limit of agreement were 10.3 mm and -4.8 mm, respectively). The mean difference in SW was 2.3 mm (upper limit of agreement and lower limit of agreement of 10.4 mm and -9.2 mm, respectively). The SSD mean difference was 2.8 mm (upper limit of agreement and lower limit of agreement of 10.6 mm and -5 mm, respectively).
  
  
  CONCLUSIONS
  Categorical agreement in diagnosis was 100% and agreement between 3-D US and MRI measurements was good with narrow differences. Variations were unlikely to be greater than intra- and inter-observer variations anticipated in MRI readings. 3-D US can replace MRI for diagnosis and measurement of uterine septa.
authors.affiliation: Department of Obstetrics and Gynecology, Division of Reproductive, Endocrinology and Infertility, McGill University Health Centre, Royal Victoria Hospital, Montreal QC.
authors.forename: Baris
authors.initials: B
authors.lastname: Ata
authors.affiliation: Department of Obstetrics and Gynecology, Division of Reproductive, Endocrinology and Infertility, McGill University Health Centre, Royal Victoria Hospital, Montreal QC.
authors.forename: Dan
authors.initials: D
authors.lastname: Nayot
authors.affiliation: Department of Obstetrics and Gynecology, Division of Reproductive, Endocrinology and Infertility, McGill University Health Centre, Royal Victoria Hospital, Montreal QC.
authors.forename: Atanas
authors.initials: A
authors.lastname: Nedelchev
authors.affiliation: Department of Radiology, McGill University Health Centre, Royal Victoria Hospital, Montreal QC.
authors.forename: Caroline
authors.initials: C
authors.lastname: Reinhold
authors.affiliation: Department of Obstetrics and Gynecology, Division of Reproductive, Endocrinology and Infertility, McGill University Health Centre, Royal Victoria Hospital, Montreal QC.
authors.forename: Togas
authors.initials: T
authors.lastname: Tulandi
mesh_terms: D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008279:Magnetic Resonance Imaging; D011446:Prospective Studies; D014463:Ultrasonography; D014599:Uterus / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000473:pathology
keywords: 3-D ultrasound; MRI; bicornuate uterus; infertility; magnetic resonance imaging; uterine anomalies; uterine septum