1. CENTRAL NERVOUS SYSTEM – CORE ASSESSMENT
๐ Normal Cranial Shape and Size
๐ Intact Calvarium
๐ Normal Brain Echogenicity
๐ Symmetrical Cerebral Hemispheres
2. VENTRICULAR SYSTEM
๐ Normal Lateral Ventricles (<10 mm)
๐ Mild Ventriculomegaly (10–12 mm)
๐ Moderate Ventriculomegaly (13–15 mm)
๐ Severe Ventriculomegaly (>15 mm)
๐ Dangling Choroid Plexus
3. MIDLINE STRUCTURES
๐ Cavum Septi Pellucidi Present
๐ Absent Cavum Septi Pellucidi
๐ Corpus Callosum Visualized
๐ Agenesis / Dysgenesis of Corpus Callosum
๐ Midline Shift
4. POSTERIOR FOSSA
๐ Normal Cerebellum (Transcerebellar Diameter Appropriate)
๐ Normal Cisterna Magna (2–10 mm)
๐ Dandy–Walker Malformation
๐ Blake’s Pouch Cyst
๐ Mega Cisterna Magna
๐ Cerebellar Hypoplasia
5. NEURAL TUBE DEFECTS
๐ Anencephaly
๐ Acrania / Exencephaly
๐ Encephalocele
๐ Spina Bifida (Indirect Cranial Signs)
๐ Lemon Sign
๐ Banana Sign
6. CORTICAL & MIGRATION ABNORMALITIES
๐ Normal Sulcation Pattern (Gestational Age Appropriate)
๐ Lissencephaly
๐ Polymicrogyria
๐ Schizencephaly
๐ Gray Matter Heterotopia
7. INTRACRANIAL CYSTS & MASSES
๐ Arachnoid Cyst
๐ Porencephalic Cyst
๐ Choroid Plexus Cyst
๐ Intracranial Hemorrhage
๐ Intracranial Tumor
8. CEREBRAL VASCULATURE
๐ Normal Pericallosal Artery
๐ Vein of Galen Aneurysmal Malformation
๐ Abnormal Intracranial Doppler Flow
9. FUNCTIONAL & DYNAMIC ASSESSMENT
๐ Normal Fetal Head Movements
๐ Normal Brainstem Appearance
๐ Abnormal Fetal Neurological Behavior
10. SOFT MARKERS & ASSOCIATIONS
๐ Choroid Plexus Cysts (Aneuploidy Marker)
๐ Ventriculomegaly – Chromosomal Risk
๐ Absent CSP – Holoprosencephaly Spectrum
11. ETIOLOGICAL & SYNDROMIC ASSOCIATIONS
๐ Chromosomal Abnormalities (Trisomy 13, 18)
๐ Congenital Infections (TORCH)
๐ Genetic Syndromes
๐ Neural Tube Defects
๐ Fetal Ischemic or Hemorrhagic Injury
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