Figure 1
From: Prenatal diagnosis of fetal unilateral lung agenesis complicated with cardiac malposition
The transducer orientation and display format of the image on the screen. The orientation marker is depicted as the gray bar on the transducer. Transducer orientation marker indicates the direction that was displayed in the left side of the video screen. The direction of the beam on the screen is from top to bottom, which means the upper area of the screen displays the anterior part of the subject (from the perspective of the operator).