The function of the shutter for photography does not include

Indicates the deflection angle of the tube head. According to the query in the question bank, it can be seen that the function of the shutter used in photography does not include indicating the deflection angle of the tube head. The X-ray shutter on the X-ray machine is also called a beam limiter. It is installed in the window of the X-ray tube assembly to control the X-ray display of the appropriate radiation field. It is used to shield unnecessary original emission lines and minimize the patient's exposure area.