This study is for people aged 50-80 who had a *low-dose CT* (LDCT) scan showing possible lung cancer. LDCT is a special X-ray to find lung issues early. If referred for more tests and haven't had an invasive test yet, you might join. The study will check a new blood test for early lung cancer. It’ll last about 2 years, but your part is mostly on the day of blood collection. No extra hospital visits are needed. You’ll follow your usual medical care, and your data will be checked electronically for a year.

• **Study Duration:** About 2 years, but your part mainly includes just one day for blood collection.
• **Visits Needed:** Only your usual medical care visits, no extra appointments required.
• **Eligibility:** Ages 50-80, recent LDCT showing possible lung cancer, and no invasive tests done yet.

People with past lung cancer, other cancers in the last 10 years, or certain diseases can’t join. This study aims to help find lung cancer early with a simple blood test. If you qualify, this might be a chance to contribute to important research while continuing your usual care.