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§3 Making X-ray photographs
§3
Making X-ray photographs
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Middelbare school
havo
Leerjaar 3
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§3
Making X-ray photographs
Slide 1 - Diapositive
Learning objectives
You can explain what can happen when electromegnetic radiation hits an object.
You can describe how X-ray pictures are taken.
You can list the health risks of X-rays.
You can explain how the biological damage from radiation is expressed.
You can state and explain the safety rules for working with X-rays
You can explain how the various half-value layes are used.
Slide 2 - Diapositive
Last lesson
Everything about electromagnetic radiation.
Slide 3 - Diapositive
What is not a characteristic of electromagnetic radiation?
A
Always a speed of 3,0*10^8 m/s
B
Can travel through vacuum.
C
T
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e
w
a
v
e
l
e
n
g
t
i
s
c
a
l
l
e
d
l
a
b
d
a
(
λ
)
D
Has different speeds.
Slide 4 - Quiz
Question 6:
Miriam is reading the website of Radio Rijnmond: ''Our transmissions have been on 93,4 MHz sins 1 july.''
Calculate the wavelength of the radio waves.
λ
=
f
c
Slide 5 - Question ouverte
mega = 1.000.000
Slide 6 - Diapositive
Slide 7 - Diapositive
What is a spectrum?
A
An prisma.
B
An artificial light source.
C
A range of radiation.
D
A James Bond movie.
Slide 8 - Quiz
Radiation
Absorption
=
Radiation is absorbed
Transmission
=
Radiation passes through
Reflection
=
radiation is reflected back
Absorption
Transmission
Reflection
Slide 9 - Diapositive
Absorption + Reflection
Slide 10 - Diapositive
The transparency of the atmosphere to various types of radiation
Slide 11 - Diapositive
Hazards
Slide 12 - Diapositive
X-ray
X-ray source
Detector screen
Body part
Slide 13 - Diapositive
Equivalente doses
Is a measure of the biological damage that occurs
Unit is Sievert (Sv).
1 Sv leads roughly to a 5% higher chance of ever getting cancer (20 mSv is the max).
Slide 14 - Diapositive
Half-value layer
Slide 15 - Diapositive
Protection
Distance;
Wearing an lead apron;
Lead inside walls and windows
('Lead glass')
Slide 16 - Diapositive
What do bones do with X-rays in particular?
A
Let it through
B
Absorb it
C
Reflect it
Slide 17 - Quiz
Right/wrong
Parts that are dark in an X-ray such as muscles, organs and other tissues have absorbed a lot of X-rays.
A
Right
B
Wrong
Slide 18 - Quiz
H6 §3 - 3 till 7
Slide 19 - Diapositive
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