How soon you can get pregnant after a film is determined by the nature of the test. ultrasound and MRI can be done at any time, general X-rays and CT exams can also be done that month or the next month, while special tests such as PET-CT require pregnancy after three months. The common name of the film is the medical imaging examination, among which, ultrasound, color ultrasound, MRI examination have no radiation, no harm to human body, no effect on pregnancy, can be ready to have a child at any time. x-ray, CT is a radioactive examination, a single examination generally does not cause radiation damage to human body, and the examination will do the corresponding protective measures, using lead cap, lead apron, lead apron, etc. to protect the head, thyroid, genitals and other organs. The test will be done with appropriate protective measures, such as using lead caps, lead aprons, lead aprons, etc. to protect the head, thyroid, genitals and other organs. However, if a woman undergoes frequent CT examinations or PET-CT examinations, the amount of radiation is higher and it is recommended to consider pregnancy after three months.