What is a CT PNS scan?
The computed tomography (CT) of the paranasal sinus (PNS) is a medical imaging technique that uses X-rays and computer technology to produce precise and detailed images of the sinuses.
It is a non-invasive, reliable imaging method used to identify sinus inflammation or obstruction.
What are paranasal sinuses?
The paranasal sinuses (PNS) are a group of air-filled cavities surrounding the nasal cavity. The paranasal sinuses are divided into four pairs:
- Maxillary sinuses
- Frontal sinuses
- Ethmoidal sinuses
- Sphenoidal sinuses
What are the indications for a PNS CT scan?
- To diagnose inflammatory diseases, such as acute rhinosinusitis, chronic sinusitis , polyps and cysts, and mucoceles
- To detect a foreign body
- To determine the presence of malignancy
- For preoperative evaluation
- For guiding surgical procedures
- To detect any mass or defect in the sinuses
- To diagnose birth defects
- To assess trauma or injury
- To determine the cause of repeated bleeding from the nose
How to prepare for the CT PNS scan?
- Dress in comfortable, loose clothing.
- Remove all metallic objects as they can hinder with CT imaging.
- When you enter the scanner, the X-ray beam will rotate around you. The X-ray beam will not be visible to you.
- Do inform the doctor about the medications being taken and about any allergies that you may have.
- Side effects could be aggravated by a recent ailment or even some other medical event.
- Women should notify the doctors whether they are pregnant before the procedure.
How is the CT PNS scan performed?
- You may be asked to change into a hospital gown.
- You will be instructed to lie down on a table that slides through the centre of the CT scanner. You can either lay down on your back or face down with your chin raised.
- When you enter the scanner, the X-ray beam will rotate around you. The X-ray beam will not be visible to you.
- A computer generates the separate images of each body region. These are known as slices. The pictures can be saved, viewed on a computer screen, or printed on a film. By stacking these slices together, a 3-dimensional view of the body can be created.
- Since movement can cause blurred images, you must remain still during the exam. You might be instructed to hold the breath for brief periods of time. In order to keep you still throughout the procedure, pillows and straps may be used.
- The scanning procedure is expected to last about 30 seconds. The entire procedure should take no more than 15 minutes.
What are the risks associated with a CT PNS scan?
The following are the risks of a CT PNS scan:
- There is always a minor possibility of developing cancer from excessive radiation exposure. The advantage of an accurate diagnosis, on the other hand, far exceeds the risk of CT scanning.
- PNS scanning is generally not advised in pregnant women until absolutely necessary.
- If the contrast medium is given intravenously, mothers should refrain from feeding their babies for 24 to 48 hours.
- An allergic reaction to iodine-containing contrast material is possible. However, the reaction is extremely rare.
Conclusion
A CT PNS test is a safe and effective procedure. It is an imaging method that helps diagnose sinus-related conditions, guides treatment, and plans surgical interventions. The CT PNS procedure is used to detect infections, polyps, or structural abnormalities. It provides a doctor with precise details, an accuracy that other imaging methods cannot always capture. A CT PNS test is generally quick, non-invasive, and reliable; this makes it an essential diagnostic tool. Choosing the right CT PNS procedure can ensure patients receive timely care and accurate treatment planning.
FAQs:
Is a CT PNS scan painful?
A CT PNS test is not painful. It is a non-invasive procedure. You will be made to lie on a scanner table while the doctors take the images. The CT PNS procedure takes a few minutes, making it the most demanding part of the process. The imaging machinery causes noise, which may be a source of discomfort for some. Some may also feel claustrophobic as the scanner table is pushed into the imaging machinery. However, the scan itself is not painful.
How is a CT PNS scan different from an MRI?
A CT PNS test uses X-rays for clear images using ionizing radiation, while an MRI uses magnets and radio waves. A CT PNS procedure gives an accurate image of bony structures, like sinuses, making it ideal to detect fractures, tumors, or infections. An MRI is ideal to get an accurate image of soft tissue details, such as ligaments or organs. A CT PNS test is suitable for emergency cases as it can be completed quickly. An MRI does not use radiation, but takes longer to complete. An MRI is also not suitable for patients with metal implants.
Can children undergo a CT PNS scan safely?
A CT PNS scan is safe for children, but it is only advised if it is absolutely essential for diagnosis. CT PNS tests use ionizing radiation to scan bony structures, like the sinuses. Children can be sensitive to radiation. So doctors use careful consideration and low-dose techniques to minimize risk. Risk of radiation exposure can be reduced by adjusting settings for a child’s size or using pediatric-specific equipment.
How soon will I get the results of a CT PNS scan?
The results of a CT PNS scan should be available within 24 to 48 hours. The availability of results, however, can also depend on the facility and whether the findings are urgent. A radiologist typically reviews the images, and the final report is sent to the referring doctor. If the findings are urgent, your doctor will contact you sooner to discuss further treatment.
Does health insurance cover a CT PNS scan?
Insurance coverage of any medical procedure depends on the insurance company and the policies you avail. Many health insurance packages cover CT PNS tests, but it is best to verify with your specific insurance provider. You can also verify what out-of-pocket expenses, if any, you might face in the process of getting a CT PNS scan.
Can I drive or go back to work after a CT PNS scan?
It is generally safe to drive or go back to work after a CT PNS scan. This procedure does not require special aftercare. However, if a contrast dye was used during the CT PNS test, you may be asked to rest for a while at the clinic before you leave. This is to make sure you feel well enough after the CT PNS procedure. Always follow the specific instructions given by the doctor.
How much does a CT PNS scan cost in India?
The cost of a CT PNS procedure in India depends on the facility and the city where you are availing the test. The general price range for a CT PNS procedure in India is between ₹1,000 and ₹3,000. If contrast dye is used during the test, it could affect the overall cost.
