x-ray films
DESCRIPTION
X-ray films. Yuen-Jung Chang. Medical Image. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/1.jpg)
X-ray filmsYuen-Jung Chang
![Page 2: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/2.jpg)
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
![Page 3: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/3.jpg)
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.
![Page 4: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/4.jpg)
Decoration & Art
![Page 5: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/5.jpg)
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
![Page 6: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/6.jpg)
X-RAY GENERATORS
Sticky tape generates X-rays (triboluminescence)
![Page 7: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/7.jpg)
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
![Page 8: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/8.jpg)
CT scanning
Reconstructed into 3D images
![Page 9: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/9.jpg)
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
![Page 10: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/10.jpg)
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.
![Page 11: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/11.jpg)
![Page 12: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/12.jpg)
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
![Page 13: X-ray films](https://reader035.vdocuments.site/reader035/viewer/2022062520/56815f43550346895dce1de4/html5/thumbnails/13.jpg)
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.