LOINC long common name : Fetal Abdomen Diameter transverse US;
LOINC short name : Fetal TAD US.meas;
LOINC description : Measured in the transaxial plane from outer to outer margin at level of umbilical
vein. Umbilical portion of the left portal vein must not extend to the anterior abdominal
wall and must be equidistant from the right and left sides of abdomen.;