It’s a well-known fact that our bodies are vulnerable—especially when illness strikes. While many health conditions can be linked to lifestyle factors, others stem from underlying issues that often go undetected without proper diagnostic screening. That’s why early detection is critical.
One valuable tool for this is a virtual colonoscopy, a non-invasive imaging test that can help identify conditions before symptoms appear.
Because the colon and rectum are essential parts of the large intestine and play a role in digestion and waste elimination, issues in these areas can significantly affect overall health.
Despite its importance, many people are unfamiliar with the process and purpose of a virtual colonoscopy. This article will explain what it is, who should consider getting one, and what you can expect from the procedure.
Key Takeaways:
- Virtual colonoscopy, also known as CT colonography, is a non-invasive imaging test used to detect colorectal cancer, polyps, ulcers, and other abnormalities in the colon and rectum.
- It is recommended for most adults starting at age 45, or earlier for individuals with risk factors such as a family history of colorectal cancer or certain genetic conditions.
- Compared to traditional colonoscopy, virtual colonoscopy does not require sedation, has a shorter procedure time, and involves no internal scope.
- The test involves inflating the colon with air or carbon dioxide and using a CT scanner to capture detailed images of the bowel.
- Patients can typically resume normal activities immediately after the procedure, with only minor temporary discomfort such as gas or cramping.
- While virtual colonoscopy can detect abnormalities, polyp removal or biopsy still requires a follow-up traditional colonoscopy.
- Insurance coverage may vary, so patients are encouraged to verify benefits before scheduling the test.
What is a Virtual Colonoscopy?
A virtual colonoscopy, also known as CT colonography, uses computed tomography (CT) scanning to produce detailed, cross-sectional images of the colon and rectum. Unlike traditional colonoscopy, this method does not require a scope to be inserted into the colon, making it a less invasive alternative for colorectal cancer screening. The primary goal of a virtual colonoscopy is to detect polyps, ulcers, diverticula, and potential signs of colorectal cancer.
The Purpose and Role of a Virtual Colonoscopy in Health Diagnostics
A virtual colonoscopy plays a key role in preventive healthcare, particularly in the early detection of colorectal conditions.
A Tool for Colorectal Cancer Screening
The primary purpose of a virtual colonoscopy is to screen for colorectal cancer in individuals who are at average or elevated risk. By producing detailed images of the colon and rectum, the scan can reveal abnormal growths or changes in tissue that may indicate the presence of precancerous polyps or cancerous lesions. Early detection allows for timely medical intervention, which can significantly improve outcomes.
Detection of Other Colonic Abnormalities
In addition to screening for cancer, virtual colonoscopy can detect:
- Polyps: small growths on the lining of the colon that may develop into cancer over time.
- Ulcers: sores or breaks in the lining of the colon, which may indicate inflammatory conditions.
- Diverticula: small pouches that can form in the colon wall and may lead to diverticulitis.
- Structural abnormalities: such as narrowing or twisting of the colon, which can cause digestive symptoms or obstruction.
Because the scan is non-invasive and does not require sedation, it is often considered a safer and more convenient alternative for individuals who are unable or unwilling to undergo a traditional colonoscopy.
The Difference between Virtual Colonoscopy and Traditional Colonoscopy
While both procedures are used to examine the colon for abnormalities, there are key differences between a virtual colonoscopy (CT colonography) and a traditional colonoscopy.
Procedure
- Virtual Colonoscopy: Uses computed tomography (CT) imaging to take cross-sectional images of the colon from outside the body. A small tube is inserted into the rectum to inflate the colon with air or carbon dioxide, which allows for clearer imaging.
- Traditional Colonoscopy: Involves inserting a flexible tube with a camera (colonoscope) through the rectum to directly view the inside of the colon.
Sedation
- Virtual Colonoscopy: Typically does not require sedation or anesthesia, allowing patients to return to normal activities immediately after the exam.
- Traditional Colonoscopy: Usually requires sedation or anesthesia to keep the patient relaxed or asleep during the procedure. Recovery time is needed afterward.
Polyp Detection and Removal
- Virtual Colonoscopy: Can detect polyps and other abnormalities but cannot remove them. If polyps are found, a traditional colonoscopy will be needed for biopsy or removal.
- Traditional Colonoscopy: Allows for both the detection and immediate removal of polyps during the same procedure, reducing the need for follow-up testing.
Time Required
- Virtual Colonoscopy: The scan typically takes around 10–15 minutes.
- Traditional Colonoscopy: The procedure can take up to 30–60 minutes, and longer if polyps are found and removed. Additional time is needed for sedation recovery.
When Should You Get a Virtual Colonoscopy?
Most medical guidelines recommend that adults begin regular colorectal cancer screening at age 45, even in the absence of symptoms. As the body ages, the risk of developing colon-related conditions—including colorectal cancer—increases, making early detection an important part of preventive health care.
Some people may need to begin screening before age 45, depending on their personal or family medical history. Risk factors that may prompt earlier or more frequent screening include:
- Family history of colorectal cancer or advanced adenomatous polyps
- Genetic syndromes such as Lynch syndrome or familial adenomatous polyposis (FAP), which increase the likelihood of developing colon cancer
- Personal history of inflammatory bowel disease, including ulcerative colitis or Crohn’s disease
- Previous findings of colorectal polyps or a history of colon cancer
While virtual colonoscopy is not typically performed annually, individuals should follow their healthcare provider’s recommendation for how often to repeat the exam based on risk level and previous findings. If abnormalities are detected during a virtual colonoscopy, a traditional colonoscopy may be recommended for further evaluation.
Preparing for a Virtual Colonoscopy
Again, you don’t need to be sedated or put under anesthesia to get a virtual colonoscopy. However, you still need to prepare yourself to ensure there are no risks to the procedure. These preparations include:
- Not eating or drinking anything two hours before the test.
- Getting a suppository if you need to the night before the test.
- Remember to drink a lot of water two days before the test.
- Getting a colon cleanse the day before the test. This will help in making the test easier.
Our team will ensure you are prepared for your virtual colonoscopy. Proper instruction will be provided prior to your appointment.
What to Expect During a Virtual Colonoscopy
During a virtual colonoscopy, the process is typically straightforward and non-invasive. Here’s what you can expect:
- You’ll be asked to change into a hospital gown and lie down on the examination table. Positioning may vary depending on the imaging protocol, but most patients begin on their back.
- A short, flexible tube—usually about 2 inches long—is gently inserted into your rectum. This tube is used to pump air or carbon dioxide into your colon. Inflating the colon is necessary to expand the bowel and improve visibility during the scan, allowing for clearer and more accurate imaging.
- Once your colon is inflated, the table will slowly slide you into the CT scanner. The scanner takes a series of cross-sectional images of your colon. You may hear clicking or buzzing noises during this part of the test. The technician may ask you to hold your breath briefly or change positions (such as turning onto your side or stomach) to get comprehensive views of your colon.
- After the images are captured, the table will slide out of the scanner, and the tube will be removed. You can then get dressed.
After the Procedure
Because no sedation is used, you can typically return to your normal activities right after the test. You may experience temporary bloating, cramping, or gas, which is common due to the air used to inflate the colon. These symptoms usually resolve within a few hours.
Virtual colonoscopy is generally well-tolerated, and the entire procedure usually takes 10 to 15 minutes to complete.
Is a Virtual Colonoscopy Right for You?
Getting a virtual colonoscopy is an excellent idea if you’re worried about colorectal cancer. It can help you get a clear picture of your colon without the pain and discomfort that a traditional colonoscopy can cause, so you shouldn’t worry. All that matters is working with trained healthcare professionals so that you’ll get accurate results.
Craft Body Scan provides top-quality services for virtual colonoscopy. We understand the needs of our patients, so our health professionals will ensure that you get the best results according to our findings so that you’ll know the following steps to take. Simply find a location near you to book an appointment!
Common Questions
Is a virtual colonoscopy as good as a regular colonoscopy?
A virtual colonoscopy is effective for detecting larger polyps and abnormalities in the colon and rectum. However, traditional colonoscopy remains the gold standard because it allows for both detection and immediate removal of polyps during the same procedure. If a virtual colonoscopy reveals abnormalities, a follow-up traditional colonoscopy may be required for further evaluation or treatment.
Are you put to sleep for a virtual colonoscopy?
No, sedation or anesthesia is not required for a virtual colonoscopy. The procedure is non-invasive and typically well-tolerated, allowing patients to resume normal activities immediately afterward.
How painful is a virtual colonoscopy?
Most patients report only mild discomfort, such as cramping or bloating, due to the air or carbon dioxide used to inflate the colon. These symptoms are usually temporary and resolve shortly after the procedure.
What are the advantages of a virtual colonoscopy?
Key advantages of virtual colonoscopy include:
- Non-invasive imaging without the need for sedation
- Shorter procedure time (typically 10–15 minutes)
- Quick recovery with no downtime
- Effective screening tool for larger polyps and other abnormalities
However, it’s important to note that if abnormalities are found, a traditional colonoscopy may still be necessary.
Will insurance cover a virtual colonoscopy?
Coverage varies by provider and plan. Some insurance plans, including Medicare, may cover virtual colonoscopy for colorectal cancer screening if specific criteria are met. Patients are advised to contact their insurance provider in advance to verify coverage.
Who is a good candidate for a virtual colonoscopy?
Virtual colonoscopy is generally recommended for:
- Adults aged 45 or older undergoing routine colorectal cancer screening
- Individuals who cannot undergo traditional colonoscopy due to medical conditions or personal preference
- Patients seeking a less invasive screening method without sedation
However, those with a history of colorectal polyps, certain gastrointestinal conditions, or previous colorectal surgery may still be better suited for traditional colonoscopy. A healthcare provider can help determine the most appropriate screening method based on individual risk factors.
