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OP03.01: Prediction of outcome in fetuses with small head circumference at ultrasound examination: A role for z scores

selected by the principal investigator. Three independent reviewers ordinally graded the images: 1)optimal; 2)Satisfactory for screening; 3)Suboptimal not satisfactory for screening; 4)Poor visualization; 5) Not visualized. The 2-D and 3-D exams were coded with all identifying marks removed and graded independently. A score of two or better was deemed satisfactory Chi square analysis was used. Results: See Table 1. Reviewer 1 found 2-D imaged better for the the three vessel and aortic arch. Reviewer 2 found 2-D imaged better for all three views. Reviewer 3 found no significant differences. Conclusions: Future studies must address variation in the grading of cardiac images between reviewers. Clear cut standards are needed for what makes an image satisfactory for screening. Fast acquisiton 3-D imaging of the fetal heart at 18–22 weeks is potentially a powerful tool. A larger study with kappa analysis is pending from our institution.