MR reproducibility in the assessment of uterine fibroids for patients scheduled for uterine artery embolization.
Magnetic resonance imaging (MRI) is increasingly applied in the evaluation of uterine fibroids. However, little is known about the reproducibility of MRI in the assessment of uterine fibroids. This study evaluates the inter- and intraobserver variation in the assessment of the uterine fibroids and concomitant adenomyosis in women scheduled for uterine artery embolization (UAE). Forty patients (mean age: 44.5 years) with symptomatic uterine fibroids who were scheduled for UAE underwent T(1)- and T(2)-weighted MRI. To study inter- and intraobserver agreement 40 MR images were evaluated independently by two observers and reevaluated by both observers 4 months later. Inter- and intraobserver agreement was calculated using Cohen's kappa statistic and intraclass correlation coefficient for categorical and continuous variables, respectively. Inter-observer agreement for uterine volumes (kappa = 0.99, p < 0.0001), dominant fibroid volumes (kappa = 0.98, p <or= 0.0001), and number of fibroids (kappa = 0.88; CI, 0.77-0.93; p < 0.0001) was excellent. For the T(1)- and T(2)-weighted signal intensity of the dominant fibroid there was good agreement between the observers (87%; 95% CI, 71.9%-95.6%) and the intraobserver agreement was good for observer A (95%; 95% CI, 83.1%-99.4%) and moderate for observer B (kappa = 0.47). The interobserver agreement with respect to the presence of adenomyosis was good (kappa = 0.73, p < 0.0001), while both intraobserver agreements were fair to moderate (observer A, kappa = 0.55, p = 0.0003; and observer B, kappa = 0.66, p < 0.0001). In conclusion, MRI criteria used for the selection of suitable UAE patients show good inter- and intraobserver reproducibility.
Department of Radiology, Academic Medical Centre, G1-235, Meibergdreef 9, 1105, AZ, Amsterdam, The Netherlands. n.a.volkers@amc.uva.nl
Nicole A
NA
Volkers
Wouter J K
WJ
Hehenkamp
Anje M
AM
Spijkerboer
Albert D
AD
Moolhuijzen
Erwin
E
Birnie
Willem M
WM
Ankum
Jim A
JA
Reekers
D000328:Adult; D000704:Analysis of Variance; D003287:Contrast Media; D004621:Embolization, Therapeutic; D005260:Female; D006801:Humans; D007044:Hysterectomy; D007090:Image Interpretation, Computer-Assisted; D007889:Leiomyoma / Q000175:diagnosis* / Q000628:therapy; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D015203:Reproducibility of Results; D014594:Uterine Neoplasms / Q000175:diagnosis* / Q000628:therapy; D014599:Uterus / Q000098:blood supply*
D003287:Contrast Media