Objective To discusses the feasibility of CT scanning of low-x and low iodine content in early lung cancer. Methods Collected January 2014 to December 2016, the chest CT scan was performed and 96 patients were screened for lung cancer. Grouping all of the patients using completely randomly divided into routine dose group(regular doses of radiation and dosage of contrast agent 1.5 ml/Kg) and double low dose group(low doses of radiation and dosage of contrast agent 1.0 ml/Kg), contrast medium concentration of...