A fluoroscopy test combines the use of an x-ray machine with a fluorescent screen to allow for viewing of the internal organs. It is often combined with a dye contrast to get the best imaging possible.
Fluoroscopy is basically an X-ray movie. A continuous X-ray beam is passed through the necessary part of the body while motion within that area is recorded to be checked for abnormality. This is often used to view internal organs for diagnosis of irregular behavior. It is used particularly often to evaluate the digestive system.
Your technician will walk you through the fluoroscopy procedure which is very similar to receiving an X-ray. Basically, you will just stay in one position and be as still as possible. If you are required to do anything during the test, the technician will let you know. You will not feel anything during the actual test. A dye injection may be required to get the best imaging.
Like X-rays, fluoroscopy does use low doses of radiation in order to obtain images. Some people worry that the radiation used during these tests is harmful; however, the amount of radiation is very minimal and the benefits of the test usually outweigh any risks. If there is a chance you are pregnant, though, you should let your doctor know. He or she may order a different test such as an ultrasound since a growing fetus is much more susceptible to radiation than an adult.