Transcript Chain of Survival and EMSC

RADT 1303
Principles of Radiographic Exposure I
Class one of a two part physics, exposure,
radiographic technique series
This semester we learn the basics, next
semester we learn the details
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
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Chapter 1
Radiation and Its Discovery
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
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Objectives
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Describe the events surrounding the
discovery of x-rays.
Describe the dual nature of x-ray energy.
State the characteristics of electromagnetic
radiation.
List the properties of x-rays.
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
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Discovery of X-rays
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X-rays were discovered on November 8,
1895, by Dr. Wilhelm Conrad Roentgen.
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Accidental discovery
First radiograph of Mrs. Roentgen's hand
Roentgen received the first Nobel Prize presented
for physics in 1901.
Public viewed discovery as a novelty
Radiographic imaging and therapy important to
the medical sciences
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
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X-rays as Energy
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A form of electromagnetic
radiation
Behave both like waves
and like particles
Move in waves that have
wavelength and
frequency
Wavelength and
frequency are inversely
related
X-rays also behave like
particles and move as
photons
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
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Properties of X-rays
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X-rays are invisible.
X-rays are electrically neutral.
X-rays have no mass.
X-rays travel at the speed of light in a
vacuum.
X-rays cannot be optically focused.
X-rays form a polyenergetic or heterogeneous
beam.
X-rays can be produced in a range of
energies.
X-rays travel in straight lines.
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
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Properties of X-rays (cont.)
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X-rays can cause some substances to
fluoresce.
X-rays cause chemical changes to occur in
radiographic and photographic film.
X-rays can penetrate the human body.
X-rays can be absorbed or scattered by
tissues in the human body.
X-rays can produce secondary radiation.
X-rays can cause chemical and biologic
damage to living tissue.
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
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Standard Radiographic Room
Copyright © 2013, 2009, 2004, 2000 by Mosby, an imprint of Elsevier Inc.
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