What are the main points of X-ray bedside photography?

In supine position, the child is lying on his back on the film box in underwear. The film box is 2 fingers above the shoulder, flush with the mandible. The abduction of the child's upper arm is at right angles to the torso. A nurse stood by the child's head and gently pressed the upper arm. Another caregiver stood at the child's feet and pressed the child's abdomen and knees. The distance between the target films is 90cm, and a wire filter is not needed. (2) Standing projection: The child wears underwear and stands on a stool, facing the buckywall rack with wired filter, with arms spread out, so that the accompanying staff can stand on both sides of the child and fix the child's arms before shooting. The upper end of the plate is 2 fingers beyond the shoulder, and the distance between the target plates is 180cm. Use a wire filter. Adults and children should take necessary protective measures in the film. Generally speaking, the center line of chest radiography should be aligned with the center point of T4 vertebral body or photographic box. Selection of exposure conditions The characteristics of children's breathing when crying are short-lived, intense inhalation and long-term exhalation. Take advantage of the physiological characteristics of children crying, such as deep breathing, large diaphragm activity, short rest time at the end of inhalation, etc., and repeatedly observe and use this instant exposure. Photographing conditions: lying position 55kV, 100mA, 0.03 ~ 0.06s；; Standing position: 70kV, 200mA, 0.08 ~ 0. 12s.