A CT scan of the brain and paranasal sinuses without contrast is a non-invasive diagnostic procedure that provides detailed images of the brain, skull, and nasal sinuses. This method utilizes X-ray technology and computer processing to create three-dimensional images without the use of contrast agents, making it a safer option for patients with allergies or kidney conditions.
 
Procedure Overview: During the CT scan, the patient lies still on a table that slowly moves through a ring-shaped scanner. The scanner rotates around the patient’s head, emitting thin X-ray beams from various angles. These beams pass through the tissues, and detectors on the opposite side capture the absorption of the rays. A computer then processes this data to create cross-sectional images, which can be combined into 3D visualizations.
Since this CT scan is performed without contrast, it visualizes only the natural density contrasts of tissues. This allows for clear imaging of the skull, brain structures, and paranasal sinuses.
 
Indications for a CT Scan of the Brain and Paranasal Sinuses without Contrast:
Suspected Head Injury: To detect skull fractures, intracranial hemorrhages, or other brain injuries.
Post-Stroke Assessment: To identify the presence and extent of ischemic or hemorrhagic brain lesions.
Sinusitis Diagnosis: To visualize the condition of the paranasal sinuses and identify inflammation or developmental anomalies.
Brain Tumor Detection: To identify and assess the size, location, and structure of brain tumors.
Neurological Disease Monitoring: To monitor disease progression and treatment effectiveness in certain neurological conditions.
 
Preparation: No special preparation is generally required for this CT scan. However, the following recommendations should be considered:
Remove all metallic objects, such as jewelry and hairpins, before the procedure.
Inform the medical staff about any medications being taken.
Notify the staff of any mobility restrictions or difficulties remaining still.
Women should inform the staff if they are pregnant or suspect pregnancy.