Three-dimensional imaging of the uterus: The value of the coronal plane

Table 1 Steps for the application of the “Z-rotation” technique

Step 1: Position the reference marker/dot et the level of the mid-cavity over the endometrial stripe in the sagittal plane (Figure 1A)

Step 2: Use the Z rotation to align the long axis of the endometrial stripe along the horizontal axis in the sagittal plane of the uterus

Step 3: Position the reference marker/dot et the level of the of the midcavity over the endometrial stripe in the transverse plane (Figure 1B)

Step 4: Use the Z rotation to align the endometrial stripe with the horizontal axis in the transverse plane of the uterus

Step 5: Following step 4, the coronal plane of the uterus will be displayed in plane C (Figure 1C); use the Z rotation on plane C to display the midcoronal plane in the conventional orientation (Figure 1D)

Data from “The Z Technique: an easy approach to the display of the midcoronal plane of the uterus in volume sonography”. J Ultrasound Med 2006; 25: 607-612.