If you often experience blocked sinus passages, congestion, facial pain, or frequent headaches, your doctor may refer you to have a PNS CT scan. It is one of the best imaging studies for identifying sinus disease and evaluating infection, obstruction, and structural issues in the nasal cavity.
The scan is quick, painless, and produces high-quality 3D images that will assist your doctor in an accurate diagnosis. Let’s review what this scan is, why to get the test, how to prepare for it, and what to expect during and after the test.
What is PNS CT Scan?
The full form of CT PNS Scan is Computed Tomography of the Paranasal Sinuses. In simple terms, a PNS CT scan is a specialised imaging test that uses X-rays and computer technology to create detailed images of your sinuses, the hollow spaces around your nose, eyes, and cheeks.
We’re referring to a cross-sectional view of the sinus cavities that helps detect sinus infections, polyps, allergies, or nasal bone problems.
Unlike a regular sinus X-ray, which shows only basic outlines, a CT scan of paranasal sinuses gives a more accurate view of the soft tissues, air spaces, and bones in the nasal area.
Purpose of a PNS CT Scan
Doctors recommend this scan when you experience persistent sinus or nasal issues that don’t improve with medication. The PNS CT scan helps identify:
- Chronic sinusitis (long-term sinus infection)
- Nasal polyps or growths
- Deviated nasal septum
- Bone fractures in the facial area
- Fungal or bacterial infections
- Structural abnormalities affecting breathing
It also helps ENT specialists plan surgeries like Functional Endoscopic Sinus Surgery (FESS) by showing detailed images of sinus anatomy.
Preparation Before the Test
Preparing for a PNS CT scan is simple:
- You do not need to fast for the scan unless you are instructed to by your doctor.
- Remove any metal jewelry, hair clips, or glasses before entering the scan room.
- Let your doctor know if you are pregnant or have any implants made of metal.
- If a contrast dye is used, you may need to fast for 4–6 hours and let your technician know if you have allergies.
Procedure of PNS CT Scan
The CT PNS procedure is painless and usually takes about 10–15 minutes. Here’s what happens:
- Positioning: You’ll lie down on a motorized table that moves into the CT scanner.
- Scanning: The CT machine will rotate around your head to generate multiple X-ray images from different angles. You will probably be instructed to stay still and/or hold your breath during some scans.
- Contrast Use (if necessary): Occasionally, a contrast dye will be injected into your vein to clearly visualize blood vessels or inflammation within the sinuses.
- Completion: After the CT scan of the PNS is completed, you can simply go home and continue normal activities.
What Does a CT Scan of Sinuses Reveal?
A CT scan of the sinuses reveals details that a regular X-ray scan cannot. It shows:
- Blocked sinus openings
- Mucosal thickening or inflammation
- Pus or fluid buildup inside sinuses
- Presence of polyps or cysts
- Bone erosion or fractures
- Any structural deformities
This makes it especially useful for diagnosing chronic sinusitis, allergies, and sinus tumors early and accurately.
Normal Sinus CT Scan vs Abnormal
A normal sinus CT scan shows clear sinus cavities filled with air with no fluid or swelling. The bony structures appear good, and the nasal septum is midline.
An abnormal sinus CT scan may show fluid, swelling of the mucous membranes, polyps, or deformities of the bone, such as a deviated septum. This will help physicians determine the best course of treatment, from medications or surgery for faster relief.
Also read: https://www.clarityimaging.in/pet-scan-vs-ct-scan/
Benefits of a PNS CT Scan
The PNS CT scan offers several key benefits:
- Accurate diagnosis of sinus and nasal problems
- 3D images for precise evaluation
- Quick and painless procedure
- Helps plan surgeries like sinus correction or nasal reconstruction
- Detects early sinus infections before they worsen
Modern CT scanners use low radiation doses, making the test safe for most patients.
Risks and Safety
The PNS CT scan is generally very safe. However, there are a few considerations:
- Mild exposure to radiation (within safe limits)
- Allergic reactions to contrast dye (rare)
- Not recommended for pregnant women unless it’s an emergency
Inform your doctor of any allergies, kidney issues, or pregnancy before scheduling your test.
Conclusion
A PNS CT scan is one of the most reliable methods to identify any conditions or problems with your sinuses or nasal passages. If you are experiencing persistent nasal stuffiness, sinus headaches, or difficulty breathing, a PNS CT scan will show for your doctor the status or condition of your sinuses to determine the best treatment options.
It is a quick, painless, and highly accurate method for diagnosing problems with sinuses, making the PNS CT scan a valuable tool for ENT providers and patients.
For reliable and precise results, always visit the best ct scan in Coimbatore facility, where experienced radiologists and modern imaging technology ensure accurate diagnosis and peace of mind.
FAQ
1. Is a PNS CT scan painful?
No, a PNS CT scan is completely painless. You just need to lie still while the scanner takes images.
2. What does PNS stand for in a CT scan?
PNS stands for Paranasal Sinuses, which are the air-filled spaces around your nose, eyes, and cheeks.
3. What is the recovery time after a CT PNS scan?
There is no recovery time needed. You can resume normal activities immediately after the scan.
4. Are there risks with a CT PNS scan?
The test is very safe, but there’s a small exposure to radiation. Rarely, people may have mild allergic reactions to the contrast dye used.
5. Who should avoid CT scans?
Pregnant women and people with severe kidney issues (if contrast is used) should avoid CT scans unless medically necessary.
6. Difference between normal sinus CT scan vs abnormal
A normal sinus CT scan shows clear, air-filled sinuses with no swelling or fluid.
An abnormal scan may show blockages, infection, polyps, or bone deformities.
7. Is a sinus CT scan expensive?
No, it’s relatively affordable. In India, a sinus CT scan costs around Rs 1,500 to Rs 3,000, depending on the lab and whether contrast is used.
