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Rachael L. McEwing, Dolores H. Pretorius, Hector E. James and Sean Daneshmand

level assessment, ability to rotate volume data acquired using a transvaginal probe, and shortened duration of imaging time because of the ability to store the examination data and reconstruct the images later. Johnson, et al., 10 reported that lesion level could be determined more accurately with 3D ultrasonography in three of five cases of neural tube defects. The technical limitations of the 3D technique were emphasized, particularly artifact caused by fetal movement, and limited imaging results when the fetus is pressed against the uterine wall or placenta, or

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Rachael L. McEwing, Dolores H. Pretorius, Hector E. James and Sean Daneshmand

level assessment, ability to rotate volume data acquired using a transvaginal probe, and shortened duration of imaging time because of the ability to store the examination data and reconstruct the images later. Johnson, et al., 10 reported that lesion level could be determined more accurately with 3D ultrasonography in three of five cases of neural tube defects. The technical limitations of the 3D technique were emphasized, particularly artifact caused by fetal movement, and limited imaging results when the fetus is pressed against the uterine wall or placenta, or