Wikimd logo


COVID-19 portal | Vitamin D | CDC | Vaccine | Keto | W8MD Diet

WikiMD is world's largest health encyclopedia with
28,579 pages, 3,996,643 edits & 34,459,473 views.

Unbiased health & wellness info for free & for all!

X-ray

From WikiMD's free health, diet & wellness encyclopedia
Jump to navigation Jump to search
x-ray
An X-ray photograph of a person's lungs.

X-radiation is a kind of electromagnetic radiation.

Physics

Characteristics

X-rays can go through many solid materials. For this reason, taking photograms with X-rays is used in medicine in order to see bones and other things inside the body. Sometimes the term "X-Ray" means these pictures instead of the radiation that makes them.

Clinical use

  • X-ray imaging creates pictures of the body in different shades of black and white.
  • This is because different tissues absorb different amounts of radiation.
  • Calcium in bones absorbs x-rays the most, so bones look white.
  • Fat and other soft tissues absorb less and look gray. Air absorbs the least, so lungs look black.
  • The most familiar use of x-rays is checking for fractures (broken bones), but x-rays are also used in other ways.
  • For example, chest x-rays can spot pneumonia. Mammograms use x-rays to look for breast cancer.
  • When you have an x-ray, you may wear a lead apron to protect certain parts of your body.
  • The amount of radiation you get from an x-ray is small.
  • For example, a chest x-ray gives out a radiation dose similar to the amount of radiation you're naturally exposed to from the environment over 10 days.
X-ray of bimalleolar fracture
X-ray of bimalleolar fracture

CAT scan

Also known as Chest CT, X Ray Computed Tomography (x ray CT), computed axial tomography scan (CAT scan)

A chest CT scan is a more detailed type of chest x ray that takes many detailed pictures of your lungs and the inside of your chest.

Risks

  • There is a slight risk of cancer, particularly in growing children, because the test uses radiation.
  • Although the amount of radiation from one test is usually less than the amount of radiation you are naturally exposed to over three years, patients should not receive more radiation based imaging than the number that clinical guidelines recommend.
CT chest in pneumonia with abscesses caverns and effusions
CT chest in pneumonia with abscesses caverns and effusions

Other forms of imaging

The X-ray images do not show skin and muscle, however, because these tissues are transparent enough for the X-rays to pass through them without being absorbed too much. To detect tumors, other imaging devices are used; such as magnetic resonance imaging.

  • A computed tomography scanner combines an X-ray machine and computer to construct a three dimensional (3D) picture.
  • This has some ability to see other things besides bone.
  • X-rays are made by hitting metal with fast-moving electrons.
  • They are photons, tiny packets of energy that can move atoms and change chemicals in the body.
  • They are ionizing radiation but the things they do depend on the wavelength of the X-rays (or how much energy they have).
  • X-rays with smaller energies ("soft" x-rays) cause the photoelectric effect.
  • Mid-level energies cause Compton scattering. High-level energies ("hard" X-rays) cause pair production.
  • X-rays used for making pictures of people have low to medium energy. Radiation therapy that treats cancer uses Compton scattering and sometimes Pair production.
  • There are small amounts of X-rays in the air.
  • Like other energy in the air, X-rays can change living cells.
  • Exposing the human body to high doses of X-rays for a long time is dangerous.

Related pages

References



edit 

WikiMD Resources - X-ray

Latest research (Pubmed)

PubMed


Join WikiMD as a freelancer or paid editor and help improve the page X-ray or others.
X-ray is part of WikiMD's Physician reviewed^ articles available 4free, 4all, 4ever!
Medicine: Health - Encyclopedia‏‎‏‎ - Topics‏‎ -‏‎ Diseases‏‎ - Cancer - Rare diseases - Random Page Navigation: Drugs - Wellness - Obesity‏‎ - Diet - Ketogenic diet - W8MD weight loss diet - Editors: Recently Edited Pages - Alphabetical Order - Sponsors - USMLE The content on or accessible through WikiMD is for informational purposes only. WikiMD is not a substitute for professional medical advice. ^See full Disclaimers
W8MD weight loss logo

Ad. Tired of being overweight?. W8MD's insurance Weight loss program can HELP*