Three-dimensional ultrasonography in prenatal diagnosis

Area of Science:

• Medical Imaging
• Obstetrics and Gynecology
• Fetal Medicine

Background:

• Three-dimensional (3D) ultrasonography has advanced significantly, offering enhanced visualization in prenatal diagnosis.
• Current systems allow for rapid 3D image reconstruction and display directly in a clinical setting.

Purpose of the Study:

• To evaluate the diagnostic utility of 3D ultrasonography in routine prenatal examinations.
• To compare the diagnostic gain of 3D ultrasound techniques against conventional 2D ultrasound.

Main Methods:

• A total of 458 fetuses (16-38 weeks gestation) were examined using both 2D and 3D abdominal volume ultrasonography.
• 3D techniques included orthogonal image display and combined 3D surface or transparent views.
• Data were analyzed to determine the diagnostic gain provided by each 3D method.

Main Results:

• 3D ultrasonography provided a diagnostic gain in 64.2% of cases compared to 2D ultrasound.
• Orthogonal 3D display improved diagnosis in 46.2% of cases by providing accurate topographic depiction.
• Combined 3D display (orthogonal plus surface/transparent view) yielded a diagnostic gain in 71.5% of cases, enhancing defect evaluation and anatomical visualization.

Conclusions:

• 3D ultrasonography significantly enhances diagnostic capabilities in prenatal evaluations.
• The combined 3D display offers superior diagnostic information for complex fetal malformations.
• Limitations include oligohydramnios and fetal movement, which can impede surface reconstruction and introduce artifacts.