3D CT PNS

A CT PNS scan is a specialised X-ray imaging test that captures cross-sectional pictures of the paranasal sinuses—the air-filled spaces around your nose, cheeks, and forehead. The “3D” reconstruction allows doctors to rotate and view every angle, revealing:
- Sinus inflammation or polyps
- Deviated nasal septum
- Mucosal thickening
- Bone abnormalities or fractures
The scan uses low-dose radiation (typically <1 mSv) and takes less than 10 minutes.

3. When and Who Needs to Take a CT PNS Scan?

Consider the scan if you have:

• Recurrent sinusitis (more than 3 episodes/year)
• Persistent nasal congestion or facial pain
• Headaches that worsen when bending forward
• Suspected nasal polyps or tumours
• Post-trauma evaluation after facial injury
• Pre-surgical planning for FESS (Functional Endoscopic Sinus Surgery)
  Age eligibility: Adults and children >5 years (with paediatric protocols for lower dose).

• Sinus opacification level (0–100%)
• Septal deviation angle (degrees)
• Ostiomeatal complex patency (open/blocked)
• Mucosal thickness (mm)
• Haller cell & Onodi cell presence (anatomical variants)
• Bone erosion or sclerosis (signs of chronic disease)

• Confirm chronic sinusitis vs. allergy
• Evaluate unresponsive antibiotic therapy
• Detect fungal sinusitis
• Rule out sinus tumours
• Assess trauma-related fractures
• Plan balloon sinuplasty or septoplasty

Benefits of Taking the Test

• Accurate: 3D images reveal hidden pockets of infection
• Quick: 5-minute scan, 30-minute report at Cadabams Diagnostics
• Painless: No needles unless contrast is required
• Affordable: Transparent pricing and insurance tie-ups
• Guided treatment: Helps ENT specialists avoid unnecessary surgery

Illnesses Diagnosed with CT PNS Scan

• Acute & chronic sinusitis
• Nasal polyposis
• Deviated nasal septum
• Sinonasal tumours (benign & malignant)
• Fungal infections (aspergillosis, mucormycosis)
• Cystic fibrosis-related sinus disease
• Traumatic fractures of frontal, maxillary, or ethmoid sinuses

1. Fasting: Not required for plain scans; 4-hour fasting if contrast used.
2. Clothing: Wear loose, metal-free attire; remove earrings, hairpins.
3. Medical history: Inform staff about pregnancy, kidney disease, or allergies.
4. Sedation: Rarely needed; paediatric patients may receive mild oral sedation.

11. Pre-requisites

• Doctor’s prescription or digital referral
• Previous CT or MRI images (if any) for comparison
• Valid ID & insurance card (for cashless claims)

12. Best Time to Take the CT PNS Scan

• Morning slots reduce waiting time.
• Avoid during active nosebleeds; reschedule once bleeding stops.
• Ideal 2 weeks after an acute infection to minimise mucosal swelling artefacts.

13. Eligibility

• Adults: No age limit
• Children: >5 years (paediatric dose protocols)
• Pregnancy: Deferred unless urgent; first-trimester avoided
• Kidney patients: Creatinine clearance test before contrast use

14. Procedure for Taking a CT PNS Scan

1. Registration: Quick check-in at Cadabams Diagnostics reception.
2. Positioning: Lie supine on the CT table; head in a cushioned holder.
3. Scanning: Table moves through the scanner while you stay still (5–10 seconds).
4. Contrast (if ordered): IV line inserted; warm sensation for 30 seconds.
5. Completion: Resume normal activities immediately.

15. Caution Before Taking the Test

• Pregnancy: Always disclose.
• Allergies: Inform about iodine or shellfish allergy.
• Diabetes: Metformin paused 48 hours post-contrast.
• Claustrophobia: Ask for open-bore scanner or mild anxiolytic.