MSCT of the Paranasal Sinuses
Multislice computed tomography (MSCT) of the paranasal sinuses is a highly accurate diagnostic method used to examine the nasal cavity and sinus structures in detail. Compared to standard radiography or conventional CT, MSCT produces thin multi-layered slices, providing a clearer and more comprehensive visualization of mucosal changes, anatomical abnormalities, inflammatory processes and tumors.
Why MSCT of the Paranasal Sinuses Is Performed
The method provides detailed information about:
- all paranasal sinuses connected to the nasal cavity;
- the condition of the mucous membranes;
- the nasal cavity and its anatomical structures.
MSCT is used to diagnose:
- sinus inflammation (sinusitis, maxillary sinusitis, ethmoiditis, frontal sinusitis, sphenoiditis);
- fluid accumulation in the sinuses;
- benign and malignant masses;
- polyps and cysts;
- post-traumatic deformities.
The examination is also performed before surgery and to monitor the effectiveness of treatment.
What MSCT of the Sinuses Shows
- abnormal anatomical development of sinus structures;
- traumatic bone injuries of the nose and facial skeleton;
- mucosal thickening;
- benign and malignant tumors;
- foreign bodies;
- septal deviation;
- signs of chronic or acute inflammation.
How the Procedure Is Performed
Before the scan, all metal objects must be removed. The patient is positioned on a movable CT table, which slides into the gantry of the scanner. The X-ray tube rotates, acquiring thin slices that are then reconstructed into 3D images.
To avoid motion artifacts, the head is fixed with a special cushion and strap. The doctor monitors the patient from the control room and communicates via intercom.
No special preparation is required for scans without contrast. If contrast enhancement is needed, kidney function tests (creatinine and urea) must be performed in advance, and fasting for several hours before the scan is recommended.
A standard scan takes about 5 minutes. With contrast, the duration increases to 20–30 minutes.
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