Plain CT scans can detect 2mm lung nodules.
At present, plain CT scanning can detect lung nodules over 2mm, and careful observation after plain CT scanning can detect 2mm lung nodules. Due to the influence of the number of scanning layers, smaller lung nodules may be missed, and key areas can be scanned in thin layers.
Plain CT scan is the most common test to detect lung nodules and can be used as a means of screening for lung tumors, but due to the relatively small size of lung nodules, most are not able to determine the nature.
If small lung nodules are found on a plain CT scan, they can be followed up regularly or further tests can be done to clarify the diagnosis, which requires a visit to the hospital for a comprehensive evaluation by a doctor.