Optimizing method of chest low-dose CT scanning parameters

The invention relates to an optimizing method of chest low-dose CT scanning parameters. The optimizing method is characterized in that standard CT scanning equipment is used for acquiring CT images ofan artificial human body model multiple times by setting the scanning parameters, objective image quality indexes and subjective image quality evaluation indexes are acquired, and a corresponding relationship is established; subject CT scanning equipment is used for acquiring the CT images of the artificial human body model, and the scanning parameters corresponding to the lowest effective radiation absorption dose are screened out according to the corresponding relation. The optimizing method is simple, effective and high in universality, optimal scanning parameter combinations of image quality meeting the diagnosis requirements can be acquired on any CT scanning equipment, the radiation absorption dose of a subject is reduced to the maximum degree, thus, the problems that in the prior art, selection of CT scree