1. What do x-rays form part of? The electromag- netic spectrum 2. What sort of waves are x-rays? Transverse (their oscillations are perpendicular to the direction of en- ergy transfer) 3. What are the properties of x-rays? -they have a very short wavelength (about the same size as the diame- ter of...
1 what do x rays form part of the electromag netic spectrum 2 what sort of waves are x rays transverse their oscillations are perpendicular to the direction of en ergy transfer 3 what are the
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Medical Physics Applications
Medical Physics Applications
Medical Physics Applications
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Medical applications of physics
Study online at
https://quizlet.com/_2tegkj
1. What do x-rays form part of? The
electromag-
netic
spectrum
2. What sort of waves are x-rays? Transverse
(their
oscillations are
perpendicular
to the direction
of en- ergy
transfer)
3. What are the properties of x-rays? -they have a
very short
wavelength
(about the
same size as
the diame- ter
of an atom
-they have a
very high
frequency
-they cause
ionisa- tion
(adding or re-
moving
electrons in
atoms and mol-
ecules)
-they affect
photo- graphic
film in the
same way as
visi- ble light
(turning it
black)
-they are
absorbed by
1
, Medical applications of physics
Study online at
https://quizlet.com/_2tegkj metal and bone
-they are
trans- mitted
by healthy
body tissue
4. What are some uses of x-rays? -Form images
of bones on
photo-
graphic film
-Dental
problems
5. What is used in modern x-ray devices instead of Charged
pho- tographuc film? Coupled
Devices
(CCD's)
2
, Medical applications of
physics
6. How do CCD's work? They convert
lights to
electrical sig-
nals which can
be recorded in a
com- puters
memory
7. Why is using A CCD sometimes better than The image is
using photographic film? saved onto a
com- puter
8. How is a CT scan different from a normal x-ray -CT takes
image? Why is this useful in diagnosing some images that
medical condi- tions? are slices
through the
body
-They can be
reconstructed
to make a 3D
image of the
body
-This is useful
be- cause it
produces a
clearer image
9. What does radiotherapy treat? Cancer
10.What is the difference between x-rays used in They x-rays
diagno- sis and the x-rays in radiotherapy? used in
radiotherapy
provide a higher
dose of
radiation than
those used in
diagnosis
11. How does radiotherapy affect cells? -Ionising
3
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