CT Colonoscopy Vs Colonoscopy – when it comes to colorectal cancer screening, these two prominent methods stand out. Both procedures have their unique advantages and disadvantages, and understanding these can help you make an informed decision. Let’s delve into what each procedure involves, their pros and cons, and why you might choose one over the other.
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What Is A CT Colonoscopy?
CT Colonoscopy, also known as Virtual Colonoscopy or CT Colonography, is a non-invasive imaging procedure that uses X-rays and computer technology to produce detailed images of the colon and rectum. During the procedure, you lie on a table that moves through a CT scanner, The doctor will insert a small, flexible tube about two inches into the rectum and pump air into the colon (either manually or using an electronic pump) to inflate it. This is to eliminate any folds or wrinkles that might hide polyps from the doctor’s view. The CT scanner which captures cross-sectional images of the colon. These images are then combined to create a comprehensive view of the colon’s interior.
Bowel cleansing is required to ensure that the colon and rectum are empty for the procedure.
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What Is A Traditional Colonoscopy?
A traditional Colonoscopy is an invasive procedure that involves inserting a flexible tube with a camera into the rectum to examine the entire length of the colon. The procedure is performed under sedation, and it allows the doctor to not only visualise the colon but also to remove polyps or take tissue samples for biopsy. A colonoscopy is considered the “gold standard” for colon & rectal cancer detection.
Bowel cleansing is required to ensure that the colon and rectum are empty for the procedure.
The cost of a colonoscopy in Singapore (private sector) may range from about S$2,000 – S$3,500.
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Pros And Cons Of CT Colonoscopy Vs Colonoscopy
Each of the 2 methods have their pros and cons. The table below summarises the pros and cons of CT colonoscopy vs colonoscopy.
| CT COLONOSCOPY | COLONOSCOPY |
|---|---|
| Non-Invasive: CT Colonoscopy does not require sedation or insertion of a scope, making it less uncomfortable for patients. | Invasive: Requires sedation and the insertion of a scope, which can be uncomfortable and carries risks such as perforation and bleeding. |
| Quick Recovery: Since it’s non-invasive, there is no recovery time, and you can resume normal activities immediately. | Recovery Time: Requires some recovery time due to sedation, and you may need someone to drive you home. |
| Less Risk: There is less risk of perforation or bleeding, which are potential complications of a traditional colonoscopy. However, there is still a risk that inflation of the colon with gas causes injury to the colon. | Risk of Complications: Although rare, there is a risk of complications such as perforation, bleeding, and adverse reactions to sedation. |
| Comprehensive Imaging: Provides detailed images of the colon and can detect polyps and other abnormalities. | Comprehensive Examination: Provides a detailed view of the entire colon, allowing for the detection of small polyps and other abnormalities. |
| Radiation Exposure: CT Colonoscopy involves exposure to X-rays, which carries a small risk of radiation-induced cancer. | Radiation Exposure: Traditional Colonoscopy procedure itself does not involve exposure to X-rays. |
| No Immediate Polyp Removal: If polyps are detected, a traditional colonoscopy is still needed to remove them. | Polyp Removal: Allows for the immediate removal of polyps during the procedure, reducing the risk of colorectal cancer. Accurate Diagnosis: Biopsies can be taken during the procedure, providing accurate diagnosis of any abnormalities. |
| False Positives: There is a higher chance of false positives, which can lead to unnecessary follow-up procedures. | Lower False Positives: Fewer false positives compared to CT Colonoscopy. |
Why Choose One Over the Other?
The choice between CT Colonoscopy and traditional Colonoscopy depends on several factors, including your medical history, risk factors, and personal preferences. Here are some considerations:
- Medical History: If you have a history of colorectal cancer or polyps, a traditional colonoscopy might be recommended for its ability to remove polyps immediately.
- Risk Factors: If you have a higher risk of radiation-induced cancer, you might prefer a traditional colonoscopy to avoid the radiation exposure from a CT Colonoscopy.
- Comfort and Convenience: If you prefer a non-invasive procedure with no recovery time, a CT Colonoscopy might be the better option.
- Follow-Up Procedures: If you are willing to undergo a follow-up procedure to remove any detected polyps, a CT Colonoscopy can be a good initial screening method.
Conclusion
Both CT Colonoscopy and traditional Colonoscopy are valuable tools for colorectal cancer screening. The best choice depends on your individual circumstances and preferences. It is important to discuss your options with your doctor to determine the most suitable screening method for you.
Contact Us For An Appointment
If you have any concerns or questions about these procedures, do not hesitate to reach out to your healthcare provider. They can provide personalised advice and help you make an informed decision. If you require assistance to get an appointment with a colorectal doctor, contact us via the button below.
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This article is informative only and is not intended to be a substitute for professional medical advice, diagnosis, or treatment, and should never be relied upon for specific medical advice.