A coronal oblique plane of the mid-abdomen and pelvis is obtained to demonstrate the right and left kidneys. This is achieved by turning the transducer 90 degrees from the axial plane at the level of the mid-abdomen and sliding obliquely to display both kidneys in the same view. Color Doppler may be added to demonstrate both renal arteries, thus confirming the presence of both kidneys. This step is not necessary however, especially when the kidneys are easily demonstrated on Gray scale ultrasound.
Abnormalities that can be detected by the axial and coronal planes of the fetal abdomen and pelvis include abdominal wall defects, abnormal situs, urogenital anomalies with or without megacystis, intraabdominal cystic structures, bowel dilation, single umbilical artery, and others.
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