Traditional Culture Encyclopedia - Photography and portraiture - What is a disaster recovery check?
What is a disaster recovery check?
The imaging principle of DR and CT is the same, both are X-ray imaging, because X-rays have a strong penetrating power to human tissues and structures. However, the density of human tissue structure is different, and the amount absorbed when X-rays penetrate is also different.
Extended data:
The radiation dose of DR is very low. The chest posture photos of a DR (adult) were taken at 125KV, 320MA, 0.3MAS and a distance of 4500px, and the X-ray dose was only 0.20 roentgen, which was only 1/53.3 of the chest posture photos of ordinary screen combination (the X-ray dose of ordinary screen combination X-ray film was 65,433).
It is110 of the X-ray dose of CR photos, that is, the X-ray dose received by one screen of combined X-ray chest radiography is equivalent to the total X-ray dose of 53.3 DR photos, so the X-ray dose received by DR photos is far lower than the radiation standard set by CEC.
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