X-ray filmsYuen-Jung Chang

Medical ImageBefore the invention of an x-ray, doctors would sometimes be forced to do exploratory surgery to diagnose some injuries and diseases. Now, an x-ray is a quick and painless procedure that has become a common occurrence is just about every doctor‘s office and hospital in the civilized worldCheap, Fast, Easy, Painless

Baggage scanFor more than 100 years X-ray technology has been instrumental in exposing details hidden from the human eyeX-Ray machines are a perfect solution for the quick but thorough inspection of baggage and other materials for firearms and other weapons.

Decoration & Art

How it works When x-rays penetrate the body, they are absorbed in varying amounts by different parts of

the organ ex: skin tissue does not absorb the wave. However, denser objects such as bones, tendons and ligaments may absorb the x-rays. The soft tissue around the bones is much less dense and attenuates or absorbs far less x-ray energy

X-RAY GENERATORS

Sticky tape generates X-rays (triboluminescence)

Radiography X-rays through a patient to a capture device then converted into an image for diagnosis

Fluoroscopy Special applications of X-ray imaging, in which a fluorescent screen and image intensifier tube

is connected to a closed-circuit television system. This allows real-time imaging of structures in motion

CT scanning

Reconstructed into 3D images

Safe? Radiation dosage ? A study into the risk of developing cancer from exposure to

medical X-ray tests has estimated that 0.6% of all cancers diagnosed in the UK are due to medical X-rays.

" Background" radiation exposure We are exposed to radiation from natural sources all the

time. The average person in the U.S. receives an effective dose of about 3 mSv per year from naturally occurring radioactive materials and cosmic radiation from outer space The added dose from cosmic rays during a coast-to-coast round trip flight in a commercial airplane is about 0.03 mSv

X-ray safety

Because different tissues and organs have varying sensitivity to radiation exposure. The term effective dose is used when referring to the radiation risk averaged over the entire body.

CERN typically delivers about 0.01 mSv of effective dose of radiation to someone residing in the local area per year. This is less than 1% of the total annual dose of 3.7 mSv that individuals

already receive on average

Conclusion

Help doctor quickly diagnose some injuries and diseases.

Reduce the risk of terrorist attacks on aircraft & save inspection time.

As with other medical procedures, x-ray are safe when used with care.