Keep a record card for everyone in your family. These were coated with emulsion on one side only. The first x-rays were recorded on glass plates. Photographic film with a nitrocellulose base was already being marketed by George Eastman. Show the card to your health care professionals to avoid unnecessary duplication of X-rays of the same body part. History By the time x-rays were discovered, photography was already an art. When an X-ray is taken, fill out the card with the date and type of exam, referring physician, and facility and address where the images are kept. Know your X-ray history. "Just as you may keep a list of your medications with you when visiting the doctor, keep a list of your imaging records, including dental X-rays," says Ohlhaber. Using digital imaging detectors instead of film further reduces radiation dose. Tell the X-ray technologist in advance if you are, or might be, pregnant.Īsk if a protective shield can be used. If you or your children are getting an X-ray, ask whether a lead apron or other shield should be used.Īsk your dentist if he/she uses the faster (E or F) speed film for X-rays. It costs about the same as the conventional D speed film and offers similar benefits with a lower radiation dose. A double exposure is a combination of two images into one where one image is overlaid onto another at less than full opacity. Exposed films should always be separated from unexposed film while taking radiographs. For seven specific genes in the mouse, the doubling dose of gamma radiation for spermatogonia is about 0.3 Gy for high-intensity exposure and about 1.0 Gy for low-intensity exposure.
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