Radiographic imaging apparatus for obtaining improved radiographic images and operation method thereof

An operation method of a radiographic imaging apparatus including a radiation irradiator irradiating a subject with radiation, an image obtainer generating continuous radiographic images by receiving the radiation radiated from the radiation irradiator and passing through the subject, and a controller controlling the radiation irradiator and the image obtainer, the operation method comprising, by the controller:

• obtaining brightness information based on a first radiographic image included in the continuous radiographic images;
• determining a first irradiation condition based on the brightness information according to a first algorithm;
• controlling a radiation dose based on the first irradiation condition;
• obtaining a second radiographic image included in the continuous radiographic images and generated based on the first irradiation condition;
• obtaining movement presence/absence information indicating whether an imaging site of the subject is fixed;
• determining a second irradiation condition based on the second radiographic image according to a second algorithm when the movement presence/absence information indicates that the imaging site of the subject is fixed;
• controlling the radiation dose based on the second irradiation condition;
• and
• obtaining a third radiographic image included in the continuous radiographic images and generated based on the second irradiation condition.