Donna D.'s Blogs

Monday, November 21, 2005

History of Digital X-Rays

- 1900s – discovery of X-ray by Professor Roentgen.
- first 50 years from discovery of x-rays involved of an examination process using a special film cassettes, which is inserted in the body, such as the intestine through the anal, to create an image. Patients had to hold the cassettes themselves.
- Fluorescent screens and special glasses was then developed for doctors to see the images taken from x-rays at real time.
- 1946- development of film cassette changer by George Schoenander. Allowed series of cassettes to be exposed at a movie frame rate of 1.5 cassettes per second, which was later improved in 1953 to 6 frames per second by using a special cut film changer.
- development of contrast medium helped visual organs and blood vessels more clearly. Patients took them orally or was injected with them. Contrast mediums “allowed doctors to see the blood vessels, digestive and gastro-intestinal systems, bile ducts and gall bladder for the first time.”
- 1955 – Image intensifier (I.I) developed. This machine allowed the pick up and display of x-rays on a monitor using a television camera.
- 1960 – florescent system replaced by the I.I/TV combination. Combine with cut-film changer the I.I opened a new way of radiologic sub-specialty.
- 1970 – digital imaging techniques were implemented. Angiographic procedures were done, by looking at the blood vessels in the brain, kidneys, arms, legs and the blood vessels of the heart. Digital x-ray detectors replaced film cassette/film screen system. Phosphor plate technology, which are plates that traps the x-ray energy and require an intermediate processing step to release the stored information so it can be converted into digital pictures, was developed.



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