Purpose:The purpose of this study was to compare the intra-observer and inter-observer agreement in assigning a diagnosis of malignancy or benignity to adnexal masses using 2-dimensional ultrasonography (2D US) and 3-dimensional ultrasonography (3D US).
Methods:Two experienced observers (Observers A and B) performed a retrospective review of digitally stored 2D images and 3D data from a sample of 41 consecutive patients with a diagnosis of adnexal mass. Each observer independently, and blinded each other, evaluated the 2D static images of each adnexal mass and then the 3D volumes one-week later. The observers were required to classify the adnexal lesion as benign or malignant according to pattern recognition analysis. Intra-observer and inter-observer agreement were assessed by calculating the kappa index (κ).
Results:Intra-observer agreement between 2DUS and 3DUS for the observer A was 1.00 and for the observer B was 0.69. Inter-observer agreement was 0.69 for 2D US and 1.00 for 3D US (p
>0.05)Intra-observer agreement between 2DUS and 3DUS for the observer A was 0.96 and for the observer B was 0.77. Inter-observer agreement was 0.73 for 2D US and 0.92 for 3D US
Conclusions:Our results indicate that 3D US for assessing adnexal masses is reproducible, but not significantly, than 2D USOur results indicate that 3D US for assessing adnexal masses is reproducible, even more than 2D
US.Running Head: Three and Two-dimensional ultrasound: intra-inter-observer agreement