CT Brain Analysis

Key Findings

• The uppermost slices show normal-appearing cortex at the vertex level.
• Moving inferiorly, the lateral ventricles are notably enlarged bilaterally - both the frontal (anterior) horns and the bodies appear widened and rounded, which is disproportionate to the patient's apparent cortical sulcal widening.

• The lateral ventricles are markedly dilated, with enlarged and rounded frontal horns.
• The third ventricle appears widened in the midline.
• The temporal horns appear prominent as well.
• There is periventricular low density (hypodensity) surrounding the lateral ventricles in several cuts, which is the classic CT sign of transependymal CSF seepage - a hallmark of raised intraventricular pressure (active hydrocephalus).
• The cortical sulci appear relatively preserved (not as effaced as you'd see in diffuse cerebral edema), which is actually more consistent with hydrocephalus than global atrophy.

• The temporal horn dilation is confirmed bilaterally.
• The basal cisterns appear open/preserved, arguing against uncal herniation.
• No obvious large focal hyperdense lesion to suggest acute hemorrhage.
• The posterior fossa structures (cerebellum, brainstem) appear grossly normal in the bottom rows.

Radiological Impression

• Symmetric bilateral lateral ventricular enlargement (frontal horns, bodies, temporal horns)
• Third ventricular dilatation
• Periventricular hypodensity (transependymal edema) - this is particularly important as it suggests active/acute-on-chronic raised ICP, not just ex vacuo enlargement
• Relatively preserved cortex (not simply cerebral atrophy)

Differential Diagnosis

What I Do NOT See (Important Negatives)

• No obvious focal hyperdense area to suggest acute intracranial hemorrhage
• No clear midline shift
• No large hypodense infarct territory
• No obvious mass lesion
• Posterior fossa appears intact without tonsillar herniation

Clinical Correlation Required

1. Patient's age and clinical presentation (gait disturbance, dementia, incontinence in older patients = NPH; headache + papilledema in younger = obstructive hydrocephalus)
2. Contrast CT or MRI to rule out underlying cause (tumor, meningitis, aqueductal stenosis)
3. Formal radiology report - this analysis is for educational/informational purposes only and cannot substitute for a board-certified radiologist's reading

Important disclaimer: This is an AI-assisted image interpretation for informational purposes only. It must not be used as the sole basis for clinical decision-making. Please consult a qualified radiologist and neurologist for formal diagnosis and management.