Ken Weeks, Ph.D.

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Equine Brachytherapy

• Ken Weeks, Ph.D.

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Licensing

• Unique opportunity to treat opthalamic cancers in
  equine patients
• Ir 192 seeds embedded in nylon cording
• Up to 14 ribbons at one time
• Housed in former Cobalt 60 Teletherapy location

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Collaborative Project for Planning
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Collaborative Project for Planning
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Equine Application
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Radiation Safety

• ALARA
• Training
• Public Exposure
• ALARA
• Training
• Public Exposure

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Iridium seeds
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Exposure Rate Calculations from Ir-192 Seed

• the angle in radians between the exposure
  point and the ends of the line
• source.
• The seed source approximates a line source. At a
  perpendicular distance, d, from the seed midpoint
  that is at least 3 times the longest dimension of
  the seed (0.3 cm), the point source calculation
  is valid. At closer distances the point source
  calculation overestimates the true exposure rate.

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Exposure Rate Calculations from Ir-192 Seed
Example
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Exposure Rate Calculations from Ir-192 Seed
Example