ABSTRACT
X-ray examination is an important part of modern precision medicine,and plays an irreplaceable role in the diagnosis and evaluation of disease outcomes as well as the surgical planning.With the widespread use of digital radiology and CT examinations,repeated and excessive X-ray examinations occur that cause the subject to receive excessive or additional radiation doses which cause radiation damage.How to optimize the radiation dose to meet the diagnosis of the disease and reduce the radiation damage of the subject is an important topic for researchers and equipment developers.As a result,X-ray radiation damage has attracted the attention of governments,society,subjects and X-ray inspection workers.This article explores ways to reduce radiation dose and reviews its progress.