Download Radiology

BMI review
 Bob has a height of 187 cm and has a weight of
85 kg. What is his BMI.
Mr. C’s Joke/Riddle of the day
Introduction
 Radiology is the branch
of medicine that deals
with imaging technology
for diagnosing and
treating illness and
disease.
What types of radiology exist?
Introduction
 Radiology is the branch
of medicine that deals
with imaging technology
for diagnosing and
treating illness and
disease.
 It includes X-Rays, MRIs,
CT scans, PET scans,
Ultrasound and Nuclear
Imaging.
X-Rays
 Radiographs are the pictures created once X-Rays are
passed through a patient and captured on
photographic film.
 The X-Ray process is extremely inefficient as much
of the energy is actually lost as heat.
X-Rays
 Wilhelm Rontgen
discovered X-Rays on
November 8th, 1895 at
Wolfsburg University in
Germany.
 He called the radiation he
discovered X-radiation
because he did not know
its origin.
 He won the Nobel Prize in
Physics for his discovery.
X-Rays
 Rontgen discovered that
X-Rays could have a
benefit to the medical
community when he saw
a picture of his wife’s
hand on a photographic
plate after being exposed
to X-Rays.
How are X-rays Produced
 http://www.youtube.com/watch?v=IRBKN4h7u80
X-Rays
 We are a little more careful
today with our use of Xrays.
 X-rays are a high energy
radiation and the patient is
required to wear a lead
lined apron covering the
parts of their body not to
be X-rayed to prevent cell
damage.
 There is also a limit to how
much radiation a patient
(and a technologist) can be
exposed to.
X-Ray Procedure
1) The technologist aims
the X-ray generator at
the patient.
2) X-rays are sent through
the patient and
captured on a film
plate.
3) The film is developed
and the results are
analyzed.
X-Rays
 Nowadays some hospitals
have redefined the
capture screen for x-rays
so that the image is
produced on a computer
screen.
 However, the “old”
method is still the first
one chosen for any
suspected lung, heart or
skeletal abnormalities.
What are x-rays used for?
What are X-rays Used for?
What are X-rays used for
http://www.youtube.com/watch?v=umnnA50IDIY
What are X-rays used for
http://www.youtube.com/results?search_query=sword+x+ray
Dangers of X-rays
Ultrasound
 Ultrasound is cyclic sound pressure above the limits of
human hearing.
 The medical applications are called ultrasonography of
which, developing a picture of a fetus in the womb is
the most well-known.
What is Ultrasound
 http://www.youtube.com/watch?v=YQ5KXDYNHFc
Ultrasound
 Sonography is deemed
safe, because it does not
use radiation.
 The quality of the images
of ultrasound is based
mainly on the skill or the
performing technician
(sonographer).
Ultrasound
 It is used primarily to
look at soft tissues,
because it cannot pass
through air spaces in the
body (i.e. lungs, bone,
bowels…)
Ultrasound
 The main use of
ultrasound is in
examining fetal
development.
 Many problems can be
detected early and
corrected.
Ultrasound
 Other uses of ultrasound
include monitoring of
soft tissue injuries to
important organs such as
the liver, kidneys and
spleen, where a bleed out
can lead to severe
problems including
death!
Ultrasound Video
 http://www.youtube.com/watch?v=wDP95-wgUzU
Other Uses?
Other Uses
http://www.youtube.com/watch?v=2QTFEyZZAGo
Ultrasound
 There have been studies
done on cattle that have
shown that exposure to
more than 30 minutes of
ultrasound may lead to
cell damage.
 Thankfully, most
procedures take between
10-30 minutes.
Homework
What is radiology? Provide three examples.
2. Compare Ultrasound technology and X-ray
technology in terms of safety, what they can diagnose
and ease of use.
3. Describe three injuries/diseases that would be easy
to diagnose with X-Rays.
4. Describe three areas of the body that ultrasound
could be used to check for injury/disease.
1.