CECT PNS - Coronal

Overview

Contrast Enhanced Computed Tomography (CECT) PNS – Coronal is an advanced diagnostic imaging test that focuses on capturing detailed vertical (coronal) cross-sectional images of the paranasal sinuses (PNS) and adjacent structures. By using intravenous contrast dye, this scan highlights soft tissues, blood vessels, and mucosal linings, offering an enhanced view of sinus anatomy and disease beyond what plain scans can reveal. The coronal view slices the head from the front to the back, much like looking at the face head-on and cutting backward layer by layer. This perspective is highly valued in ENT practice because it closely resembles the surgical view during functional endoscopic sinus surgery (FESS), making it indispensable for both diagnosis and surgical planning.

Purpose of CECT PNS – Coronal

CECT PNS – Coronal is recommended when precise evaluation of sinus disease, adjacent structures, or suspected complications is needed. Some of the most common reasons include:

1. Chronic or Recurrent Sinusitis

• Detects mucosal thickening, fluid buildup, and obstruction of drainage pathways.
• Assesses extent of inflammation, particularly in the frontal and ethmoid sinuses.

2. Nasal Polyps and Benign Lesions

• Shows size, location, and relation of polyps or cysts to sinus openings and walls.

3. Suspected Tumors or Malignant Lesions

• Helps differentiate benign and malignant growths.
• Defines the extent of spread into adjacent bones, orbits, or cranial cavity.

4. Complications of Sinus Infections

• Identifies orbital cellulitis, abscess formation, or erosion into nearby structures.

5. Pre-Surgical Mapping

• Essential for planning FESS and other sinus procedures.
• Visualizes delicate bony landmarks critical for safe surgery.

6. Trauma

• Evaluates fractures of the nasal septum, sinus walls, and orbital floor.

7. Vascular Abnormalities

• Highlights abnormal vessels, varices, or aneurysms in or around the sinuses.

8. Congenital and Developmental Anomalies

• Detects variations in sinus shape or underdeveloped sinuses.

Procedure for CECT PNS – Coronal

This procedure is straightforward and usually lasts 10–15 minutes.

Before the Scan

• Fasting for about 4–6 hours may be advised to reduce the risk of nausea from contrast dye.
• Inform your doctor if you:
  • Have allergies to contrast dye.
  • Suffer from kidney disease or thyroid conditions.
  • Are pregnant or breastfeeding.
• Remove any metal objects like glasses, earrings, or hairpins.

During the Scan

• You’ll lie on a CT table, positioned to capture vertical (coronal) images.
• A small IV cannula is inserted to administer contrast dye.
• As the dye enters, you may feel warmth or a metallic taste briefly.
• The scanner rotates, taking thin, front-to-back images.

After the Scan

• You can usually return to normal activities right away.
• Drink water to help your kidneys flush out the contrast dye.
• The radiologist analyzes the images and shares a report with your doctor within 24–48 hours.

Benefits of CECT PNS – Coronal

• Enhanced soft tissue detail: Contrast dye helps identify inflammation, tumors, and vascular changes.
• Vertical perspective: Mirrors the view surgeons use, aiding in surgical precision.
• Comprehensive evaluation: Detects subtle lesions missed on plain scans.
• Quick and minimally invasive: Comfortable outpatient test.
• Improves diagnosis: Differentiates infection from mass lesions or complications.

Conditions Commonly Diagnosed

• Chronic and recurrent sinus infections.
• Nasal polyps and mucosal cysts.
• Benign and malignant tumors of the nasal cavity and sinuses.
• Complications like orbital cellulitis or abscesses.
• Sinus wall and orbital floor fractures.
• Congenital sinus anomalies.
• Vascular abnormalities near the sinuses.
• Pre- and post-operative assessment for sinus surgery.

Risks and Considerations

While CECT PNS – Coronal is generally very safe, there are some considerations:

Radiation Exposure

• CT scans involve ionizing radiation; protocols aim to keep doses low.

Contrast Dye Risks

• Mild reactions: warmth, metallic taste, or nausea.
• Rare but possible allergic reactions; medical staff are prepared to respond.
• Patients with kidney disease may need kidney function tests before the scan.

Pregnancy

• Typically avoided unless absolutely necessary.

Motion Sensitivity

• Even small movements can blur images; staying still is essential.

When Might Your Doctor Recommend It?

Your doctor may recommend CECT PNS – Coronal if you:

• Have unexplained or chronic sinus infections.
• Need detailed evaluation before sinus surgery.
• Present with facial swelling, headaches, or vision problems suggesting sinus complications.
• Have nasal polyps or suspected sinus tumors.
• Suffered facial trauma affecting sinus walls or the orbit.
• Show signs of orbital infection or abscess.
• Have congenital sinus structural issues.

Conclusion

The paranasal sinuses lie close to critical structures such as the orbits and cranial cavity, making precise imaging essential when disease or trauma occurs. CECT PNS – Coronal provides a clear, layered view of these complex spaces by combining contrast enhancement with vertical imaging, mirroring the view surgeons see during procedures. Through this scan, doctors can confidently identify sinus inflammation, polyps, tumors, and complications, supporting safer surgeries and more accurate diagnoses. If your doctor recommends a CECT PNS – Coronal, it’s to ensure you get the best possible understanding of your sinus health—helping guide care that’s tailored, timely, and effective.