Interpretation
Reading File
This is a non-contrast CT scan of the brain (NCCT Head). Let me analyze the full series systematically.
CT Brain Interpretation
Modality & Series
- Non-contrast CT brain (axial cuts), displayed from inferior (posterior fossa) to superior (vertex)
- Approximately 30+ slices covering the full cranium
Systematic Review
Posterior Fossa (top row):
- Cerebellum, brainstem, and posterior fossa structures appear symmetrical
- Cerebellar hemispheres show normal grey-white differentiation
- No hyperdense lesion in the cerebellum or brainstem
- Fourth ventricle appears normal in size and position — no compression or shift
- Orbits and globes visible on the most inferior cuts — appear symmetric
Basal Ganglia / Thalamic Level:
- Lateral ventricles are prominent/enlarged — the temporal horns appear widened
- Third ventricle appears dilated
- Basal ganglia (caudate, putamen, thalami) appear symmetric with no focal hyperdensity or hypodensity to suggest hemorrhage or infarction
Supraventricular / Centrum Semiovale:
- White matter appears diffusely low in attenuation (hypodense) relative to expected
- Sulci are markedly widened diffusely across both hemispheres
- Cortex shows prominent sulcal enlargement bilaterally
Vertex slices (bottom row):
- Marked widening of sulci and interhemispheric fissure
- Brain parenchyma appears reduced in volume
- No obvious focal mass, midline shift, or herniation
Key Findings
| Finding | Observation |
|---|---|
| Ventricular system | Dilated — lateral, third, and fourth ventricles enlarged |
| Sulci / fissures | Markedly widened bilaterally |
| White matter | Diffuse hypodensity (may suggest small vessel disease / leukoaraiosis) |
| Midline shift | None |
| Hemorrhage | No hyperdense areas seen |
| Mass lesion | Not identified |
| Herniation | None |
Impression
Diffuse cerebral atrophy with:
- Hydrocephalus ex vacuo — ventricular enlargement secondary to loss of brain parenchyma (not obstructive)
- Diffuse cortical and subcortical atrophy — prominent sulci, widened interhemispheric fissure
- Periventricular/deep white matter hypodensity — suggesting chronic small vessel ischemic disease (leukoaraiosis)
No acute intracranial hemorrhage, no midline shift, no space-occupying lesion identified.
Clinical Correlation
This pattern is commonly seen in:
- Neurodegenerative diseases (Alzheimer's, frontotemporal dementia, vascular dementia)
- Chronic alcoholism (global atrophy)
- Normal pressure hydrocephalus (NPH) — if clinical triad present: gait apraxia, urinary incontinence, cognitive decline
- Elderly patients with chronic microvascular disease
Recommend: Correlation with clinical presentation, cognitive assessment (MMSE/MoCA), and consider MRI brain for better characterization of white matter changes and to distinguish NPH from atrophic venltriculomegaly.
This interpretation is for educational/supportive purposes. Final radiological reporting should be performed by a qualified radiologist with access to the original DICOM data.
Interpretation
CT Head — 3D Volume Rendering Interpretation
Modality & Technique
CT skull — 3D surface rendering (bone window), shown in 12 views covering all rotational perspectives (anterior, posterior, lateral bilateral, oblique, and vertex). This appears to be a pediatric/infant skull based on the overall size, fontanelle status, and skull morphology visible.
Systematic Review by View
Global Skull Morphology:
- The calvarium is markedly enlarged and globular in shape — disproportionately large neurocranium relative to the face
- The facial skeleton appears small relative to the cranial vault — consistent with macrocrania
- Anterior fontanelle region appears widely patent and bulging
- Posterior fontanelle also appears open
Sutures:
- Coronal, sagittal, lambdoid, and metopic sutures are all widely separated/diastatic
- Suture diastasis is present diffusely — sutures appear widened beyond expected age-appropriate limits
- No evidence of craniosynostosis (premature fusion) — in fact, the opposite: sutures are splayed open
- The sutural markings visible across multiple views confirm diffuse diastasis
Skull Vault:
- Calvarium appears thinned globally
- Beaten copper / thumb printing pattern may be present on the inner table (suggestive of raised intracranial pressure over time)
- No focal skull fracture identified
- No focal lytic or sclerotic lesion
Base of Skull / Cervical Spine:
- Upper cervical spine visible and appears grossly normal
- Craniocervical junction appears intact
Key Findings Summary
| Finding | Description |
|---|---|
| Skull shape | Globular macrocrania — markedly enlarged cranial vault |
| Fontanelles | Widely open / bulging |
| Sutures | Diffuse diastasis — all major sutures widely separated |
| Calvarium thickness | Thinned |
| Facial skeleton | Relatively small (normal) compared to enlarged neurocranium |
| Fracture | None identified |
| Craniosynostosis | Absent |
Impression
Marked macrocrania with diffuse sutural diastasis and open fontanelles in an infant/young child — highly consistent with HYDROCEPHALUS causing raised intracranial pressure.
This 3D CT reconstruction demonstrates the classic cranial remodeling of untreated or long-standing hydrocephalus in infancy:
- Rising ICP → sutures split apart before fusion
- Fontanelles bulge and remain open
- Skull expands globally to accommodate increased CSF volume
- Calvarium becomes thinned from chronic pressure
Differential Diagnosis
- Communicating hydrocephalus (most likely given globular symmetric expansion)
- Non-communicating (obstructive) hydrocephalus — aqueductal stenosis, posterior fossa mass
- Subdural hygroma/chronic subdural collections — bilateral collections can cause macrocrania
- Megalencephaly — enlarged brain parenchyma (less likely given sutural diastasis pattern)
Correlation
This 3D reconstruction should be reviewed alongside the axial NCCT slices (which appear to be the prior film you shared) to:
- Quantify ventricular size
- Identify the level of obstruction
- Assess parenchymal thickness (cortical mantle)
- Plan for VP shunt or endoscopic third ventriculostomy (ETV) if not already performed
Neurosurgical referral is indicated.
For educational/clinical support purposes only. Final interpretation requires a qualified radiologist and full clinical correlation.
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