X-ray examination includes many, such as chest film, cervicothoracic lumbar spine, limb bone, abdominal plain film, gastrointestinal barium meal contrast, intravenous pyelogram (IVP) and so on. To point out in particular, when you go to the dentist to ask for a tooth, you have to take a dental x-ray to see the condition of the tooth, and this is also radioactive. X-rays are usually taken in the front and side positions, such as chest radiographs, the minimum is an orthopantomogram, holding the plate, can be taken from the front to the back, or from the back to the front, that is, all the projections overlap on a single image, so there will be a situation that obscures the lesion. The side position is to turn around and shoot from the side. Taking pictures in both front and side positions is good for improving the detection of lesions.
It's like, we buy toast bread? Like, when viewed from the front and from the side, all the organs and tissues in the front position are on one image, as well as in the side position, so there are some internal structures where multiple organs will overlap, which is why X-rays are not as accurate as CT.