proton therapy
Post on 16-Jul-2015
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Welcome to our
presentation
Huynh Trong An
Ngo Trung
Nguyen Hoang Phi Yen
Tran Huu Loc
Outline
1. Definition
2. History
3. Mechanism
4. Applications
5. Others2
1. Definition
3
Proton therapy is a
type of particle
therapy which uses a
beam
of protons to irradiate
diseased tissue, most
often in the treatment
of cancer
2. History
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1941, Robert R. Wilson
suggested that energetic
protons could be an
effective treatment
method.
1954-1957, the first treatment was
performed at Berkeley Radiation
Laboratory
1961, Harvard Cyclotron
Lab and Massachusetts
General Hospital pursue
proton therapy
By 2010, these facilities were joined by
an additional seven regional hospital-
based proton therapy centers in the
United States alone, and many more
worldwide.
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3. Mechanism
The New York Times and University of Florida Proton Therapy Institute
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Cyclotron and synchrotron accelerators
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Both the cyclotron and synchrotron are type of
particle accelerators
And both are used as a particle source
for high-energy collisions
Cyclotron Synchrotron
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But they each use different designs to accelerate particles.
However, they bot reply on two principles,
electricity and magnetism.
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Cyclotron
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Synchrotron
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Cyclotron Synchrotron
Constant magnetic field
and a constant frequency
electric field
Varying electric and
magnetic fields
A cylindrical or spherical
chamber.
A torus shaped tube
Its curve becomes larger A constant radius circle
250MeV 6.84TeV
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How can the proton therapy damage tumor?
O O
PROTON BEAM
O: :O+
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4. Applications
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The chief advantage of proton therapy
• Same tumor killing properties as X-rays
• Decreased dose to normal tissues, side effects and complications
• Treating tumors close to critical organs
• Increasing the safe dose delivered to tumors, cure rates
• Ability to re-treat tumors after recurrences
General example.
Brain tumors and inoperable brain lesions
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Tumors near the optic apparatus
Pediatric tumors (to reduce the
risk of secondary malignancies,
and to avoid the irradiation of
growth plates)
Comparison with other treatment options
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5. Others
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Cost
- For treatment
around £90,000 per person
$34,000 for eight weeks (medicare)
- For proton therapy machine:
$144 million to build
a cyclotron--220 tons
100-ton motorized gantry spins
Treatment centers
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5.3. Sum up
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