About x-rays


X-ray, or radiography, is the oldest and most common form of medical imaging.
An X-ray machine produces a controlled beam of radiation, which is used to create an image of the inside of your body. This beam is directed at the area being examined. After passing through the body, the beam falls on a piece of film or a special plate where it casts a type of shadow. Different tissues in the body block or absorb the radiation differently. Dense tissue, such as bone, blocks most of the radiation and appears white on the film. Soft tissue, such as muscle, blocks less radiation and appears darker on the film. Often multiple images are taken from different angles so a more complete view of the area is available. The images obtained during X-ray exams may be viewed on film or put through a process called “digitizing” so that they can be viewed on a computer screen.


Example of Uses   

X-ray exams can be used to view, monitor, or diagnose the following.

  • bone fractures
  • joint injuries and infections
  • scoliosis of the spine
  • abdominal pain
  • cancer

Preparation for an X-ray exam

For most X-ray exams, there is no special preparation needed. You will be asked to remove all jewellery and metal objects before the test. If your clothing has metal on it, like a zip, you will be asked to change into a patient gown.

During the Exam

You will be asked to either lie on an exam table or stand next to the X-ray machine. The room may be cool in order to keep the equipment from overheating. The technologist, or person performing the exam, may use pillows or sandbags to help you hold the proper position. You will be asked to hold very still, without breathing for a few seconds. The technologist will step behind a radiation barrier and activate the X-ray machine. Often multiple images or views are taken from different angles, so the technologist will reposition you for another view and the process will be repeated. You will not feel the radiation.

Time Required:             5 to 60 minutes
Noise During Exam:    Minimal clicking or buzzing noises.
Space During Exam:   You will either lie on an exam table or stand next to the X-ray machine with ample space around you.


X-ray exams are fast and easy.

The equipment used is relatively inexpensive and widely available.


X-ray exams exposure patients to radiation.  The amount of radiation exposure is variable depending upon the X-ray type (for example, of the brain, lungs, or abdomen) and the X-ray machine type (for example, different models and manufacturers).  Because the radiation exposure is variable, the risks are also variable.  Please speak to your radiologist, or your physician who refers you for the X-ray exam, for specific details on radiation exposure and possible risks.

Women should inform their doctor if they are or may be pregnant or nursing prior to any radiological imaging. Your doctor may recommend another type of test to reduce the possible risk of exposing your baby to radiation.


X-rays are recorded on film or recorded digitally. A radiologist, who is a physician with specialized training in X-ray and other imaging tests, will analyse and interpret the results of your X-ray and then send a report to your personal physician. For non-emergency situations, it usually takes a day or so to interpret, report, and deliver the results. Contact your personal physician for information on the results of your exam.

For further info:

    An X-ray Machine

             A Hand X-ray Image