Background: A pulmonary nodule is defined as a rounded or irregular opacity, well or poorly defined,measuring up to 3 cm in diameter. Early detection the malignancy of nodules has a significant role indecreasing the mortality, increasing the survival time and consider as early diagnosis lung cancerContent: The main risk factors are those of current or former smokers, aged 55 to 74 years with asmoking history of at least 1 pack-day.Low dose CT: Screening individuals with high risk of lung cancer by low dose CT scans could reducelung cancer mortality by 20 percent compared to chest X-ray. Radiation dose has to maximum reduced butrespect the rule of ALARA (As Low as Resonably Archivable).ACR-LungRADS 2014: Classification of American College of Radiology, LungRADS, is a newlyapplication but showed many advantages in comparison with others classification such as increasing positivepredict value (PPV), no result of false negative and cost effectiveness. “Lung nodule” was applied as asmart phone application in order to have a quickly evaluation, especially the malignancy and managementface on a pulmonary nodule.