You can usually eat when you have an ordinary lung CT test, and your diet has little effect on the lung CT test, so you don’t need to worry about it, and it is recommended that you choose light and easy-to-digest foods. However, in the case of an enhanced lung CT examination, eating is generally not recommended. Lung CT examination is a test used to check lung diseases, such as lung tissue fibrosis, lung inflammation, localized lesions, etc.. There is generally no fasting requirement for this test, and you can eat light and easily digestible food appropriately, which will not affect the test results, so patients do not need to worry about it. However, it should be noted that in the case of lung CT examination, since the examination requires the injection of contrast medium, the contrast medium may cause adverse reactions, such as nausea, vomiting and other symptoms, and if the examination is preceded by eating, it may lead to food reflux, resulting in aspiration, which may lead to choking in severe cases. Therefore, eating is not recommended when performing lung enhanced CT examination. It is recommended that patients should ask the doctor’s opinion in detail when performing lung CT examination.