Non-Contrast Head Computed Tomography for Cerebral Subdural Hematoma and Brain Parenchymal Evaluation
This low-radiation X-ray based computed tomography exam is targeted to the cerebral region to visualize the subdural space—the anatomical gap between the dura mater and arachnoid mater encasing the brain—for abnormal blood collections diagnostic of subdural hematoma, alongside assessment of the underlying brain parenchyma for associated edema, midline shift, or concurrent pathologies like traumatic contusions or hemorrhagic stroke. The protocol is optimized to detect both acute and chronic subdural bleeding, as well as evaluate for mass effect on adjacent cranial nerves and neural pathways caused by expanding hematoma volume.
This low-radiation non-contrast head CT evaluates the cerebral subdural space for abnormal blood collections diagnostic of subdural hematoma, and assesses associated brain parenchymal injury and mass effect on nearby neural structures.
Key facts at a glance
- Modality
- ct
- Body part
- head · cerebral
- Ionizing radiation
- true
- Radiation dose
- 2
- Duration (min)
- 15
- Pregnancy safe
- false
- Pediatric safe
- true
- Breastfeeding safe
- true
- Claustrophobia risk
- low
- Metal implant safe
- safe
- Sedation
- none
- LOINC
- 24725-4
- SNOMED
- 241526005
- Result turnaround
- 1-2h
- Availability
- urgent
- Setting
- er
- Cost tier
- moderate
Understanding CT Scan of brain
Computed Tomography provides detailed visualization of brain. The procedure uses controlled radiation to create precise images with excellent anatomical detail.
Clinical Indications
This examination identifies intracranial pathology, assesses neural compression, detects stroke or hemorrhage, and evaluates degenerative conditions.
What to Expect
The procedure typically takes 15 minutes. The examination is painless and non-invasive.
How to read the report
- Results reviewed by board-certified radiologist.
- Report transmitted to referring physician.
What Is This Procedure?
This ct scan evaluates cerebral, specifically brain. Uses controlled radiation to create detailed images.
What Does It Show?
Detailed images of brain. Part of the nervous system.
Common Uses
This exam is commonly used to detect brain or spinal abnormalities, evaluate nerve compression, assess stroke, and diagnose degenerative conditions.
What to Expect
The procedure takes approximately 15 minutes.
Severe pain at procedure site
urgentWorsening severe pain with fever or other symptoms. Go to urgent care or ER.
Mild symptoms after procedure
promptMild discomfort or symptoms that don't improve. Contact your doctor.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 9, 2026. · Read our editorial policy