A low-dose chest CT scan is used to screen for lung cancer. The CT scan takes around five minutes. Please follow the CT technologist's instructions such as "Breath in" and "Hold your breath" during the exam.

Adults aged 54 to 74 years old who are at high risk for lung cancer should receive a lung cancer screening every two years. Those who are at high risk are smokers whose smoking history is 30 pack years or more. Pack year is calculated through multiplying the [average daily cigarette consumption (packs)] by [years of smoking].

Symptoms of lung cancer can include incessant coughing, coughing up blood, difficulty breathing, and voice changes. However, in the early stages, these symptoms may not appear, which is why it's important to get screened regularly for lung cancer. A low-dose chest CT performed during a lung cancer screening can effectively detect even the smallest cancer nodules.

Unlike a conventional chest CT, a low-dose chest CT scan does not require fasting, as no contrast is used. Therefore, there is no preparation needed.