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Mar 27 2025

Are You at Risk? Lung Cancer Screening with Low-Dose CT

March 27, 2025  /   Family Medicine  /   22-minute read

This year, the American Cancer Society estimates there will be approximately 226,650 new cases of lung cancer in the US. Worldwide, lung cancer remains the leading cause of cancer deaths. However, advancements in early detection are transforming patient outcomes. At Welia Health, we offer the latest preventative care, including low-dose computed tomography (LDCT) scans for lung cancer screening. If you or a loved one is at high risk, understanding this screening method could be life-saving.

What is LDCT lung cancer screening?

Lung cancer screening CT, often called low-dose computed tomography (LDCT), is a specialized imaging method. It’s designed to find lung cancer at its earliest stages, often before symptoms appear. This is a game-changer because early detection can greatly improve treatment success.

The process is straightforward. You lie on a table that slides into a CT scanner, which takes detailed images of your lungs. The whole procedure is quick, non-invasive, and painless.

Who should consider LDCT lung cancer screening?

Lung cancer screening isn’t for everyone. The U.S. Preventive Services Task Force recommends annual screening with LDCT for people who meet certain criteria.

  • Age 50 to 80 years old
  • Are current smokers or have quit within the past 15 years
  • Have a 20 pack-year smoking history (this means smoking one pack a day for 20 years, two packs a day for 10 years, etc.). This online pack-year calculator will help you determine your pack-year history.

If you fit this profile, talk to your Welia Health provider about the risks and benefits of lung cancer screening. Even if you don’t meet these exact criteria, other factors might warrant bringing up the topic with your provider.

These other factors include a family history of lung disease or exposure to environmental toxins. A lung cancer risk factors assessment with your provider can help determine the best course of action for you.

Benefits of LDCT lung cancer screening

The main purpose of a CT lung cancer screening is early detection. Catching cancer early, when it’s most treatable, can dramatically improve survival rates. It can also impact the quality of life for those diagnosed with lung cancer.

  • Improved survival rates
    Clinical research consistently demonstrates the effectiveness of LDCT screening, which has been shown to significantly reduce lung cancer deaths. 

    The National Lung Screening Trial found that LDCT screening decreased lung cancer mortality by 20% compared to traditional chest X-ray screening.
  • Better treatment options
    Early detection opens up a wider range of treatment possibilities. Surgery, for example, is often most effective when lung cancer is found at an early stage.

    Delaying detection until symptoms appear can limit treatment options. It may also reduce the chance of a successful outcome.
  • Peace of mind
    For those at high risk, the proactive nature of screening can provide peace of mind. Knowing you’re taking steps to monitor your health can reduce anxiety and encourage healthier behaviors.

What to expect from LDCT lung cancer screening

Knowing what to expect during a CT scan for lung cancer can ease any anxieties. Here’s a breakdown of the process.

CT machine at Welia Health
  • Before the scan
    You’ll need to remove any metal items like jewelry. Unlike some other scans, you usually don’t need to alter your diet before a lung cancer screening CT.
  • During the scan
    The scan itself is quick, often lasting less than a minute. You’ll lie on a table that slides into the CT scanner. The Welia Health imaging technologist will instruct you to hold your breath briefly while the images are captured. The machine will make some noise. However, the procedure is entirely painless.
  • After the scan
    You can immediately go back to your normal activities after the scan. No recovery time is necessary. A radiologist will analyze the images and send a report to your provider, who will then discuss the results with you.

Understanding your results

Knowing how to interpret the results of a LDCT lung cancer screening is crucial. Here’s a simplified overview:

ResultWhat it meansNext steps
NegativeNo abnormalities were detected.Continue with annual screening if you remain in the high-risk group.
IndeterminateSmall nodules or other unclear findings were observed.Follow-up scans or further testing may be recommended.
SuspiciousFindings suggest a possibility of cancer.Further diagnostic tests, like a biopsy, will likely be necessary.

It’s very important to note that not every abnormal finding means cancer. False positives can occur. The National Cancer Institute reports that a percentage of LDCT screenings do show false positives. While this can cause temporary anxiety, the potential benefits of early detection generally outweigh these risks for those at high risk.

Concerns about LDCT lung cancer screening

It’s understandable to have concerns about any medical procedure. Some common concerns are addressed below.

  • Radiation exposure
    People often worry about the radiation exposure from CT scans. While CT scans do use ionizing radiation, LDCT uses a minimal amount.

    The radiation dose from an LDCT scan is quite low, comparable to the natural background radiation one experiences over several months. For individuals at high risk, the benefit of early detection significantly outweighs the very small risk from this radiation exposure.
  • Cost and insurance coverage
    Cost is a valid concern. The good news is that for those who meet the criteria set by the USPSTF, many insurance plans, including Medicare, cover annual LDCT screening. There is usually no out-of-pocket cost.

    It’s still wise to confirm coverage details with your insurance provider. The American Lung Association provides information about insurance coverage for lung cancer screening.
  • Anxiety about results
    Feeling anxious about test results is perfectly normal, especially when it involves cancer screening. Keep in mind that screening is a preventative measure. Many abnormalities found during screening turn out not to be cancer.

    If cancer is detected, early detection maximizes your treatment options and improves your prognosis. Your medical center care team can help you work through any anxieties around the cancer screening program and its results.
Older man breaking a cigarette in two

Beyond screening: taking care of your lungs

Lung cancer screening with low-dose computed tomography is essential for those at risk, but it’s just one aspect of maintaining healthy lungs. Consider these additional measures:

  • Avoid secondhand smoke: Exposure to secondhand smoke also elevates your lung cancer risk.
  • Test for radon: Radon is a naturally occurring gas that can increase lung cancer risk. You can purchase a home radon testing kit.
  • Protect yourself at work: If your job involves exposure to carcinogens, strictly adhere to safety guidelines and use the provided protective equipment.
  • Eat a healthy diet: Consuming a diet rich in fruits and vegetables may contribute to lower lung cancer risk.
  • Exercise regularly: Regular physical activity supports overall health, including lung function.

Combining these healthy lifestyle practices with LDCT screening provides a comprehensive approach to lung health. This helps, especially if you are in a higher-risk category or have certain cancer risk factors.

FAQs about LDCT lung cancer screenings

What is the difference between a low-dose CT scan and a regular CT scan?

The main difference is the amount of radiation used. A low-dose CT scan uses significantly less radiation than a standard chest CT. This makes it suitable for regular screening.

How often should I get screened if I’m at high risk?

The general recommendation is annual screening. Your provider can make a specific suggestion based on your smoking history.

Can lung cancer screening detect other lung problems besides cancer?

Yes, LDCT lung cancer screenings can sometimes reveal other lung conditions. This could include things like emphysema or infections. These findings may require separate evaluation and treatment.

If I quit smoking, do I still need screening?

If you meet the age and smoking history criteria (even after quitting), screening is still generally recommended. However, the recommendations change if you have quit smoking for more than 15 years. The risk reduction from quitting is substantial, but screening still provides a valuable safeguard.

What happens if the scan shows something abnormal?

If a lung nodule is found during screening, it doesn’t mean you have cancer. Many nodules are benign. Your provider will assess the size, shape, and characteristics of the nodule to determine next steps, which may include follow-up scans or a biopsy.

Get screened at Welia Health

LDCT lung cancer screening is an important tool in combating lung cancer. It presents an opportunity for early detection for those at increased risk, which in turn leads to more effective treatment options.

While no cancer screening test is perfect, the benefits of LDCT screening are significant for individuals at high risk. Discuss your personal risk factors and the suitability of screening with your Welia Health provider. Taking proactive steps and staying informed is key to protecting your health.

Call Welia Health at 320.679.1313 to make an appointment or request an appointment online.

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