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Level 1: Basic Understanding
Level 2: Double Trouble
Level 3: Safety Zone
Level 4: Brachytherapy Planning
Level 5: Speed Round
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Measurements
Distance
3.00 cm
Relative Intensity
11.1%
The Math
I = I₀ / r²
I = 1 / 3.00²
I = 1 / 9.00
I = 0.1111
Quick Reference
1 cm
100%
2 cm
25%
3 cm
11.1%
5 cm
4%
Key Rule: Double the distance = Quarter the intensity
Measurements
Distance
3.00 cm
Relative Intensity
11.1%
The Math
I = I₀ / r²
I = 1 / 3.00²
I = 1 / 9.00
I = 0.1111
Quick Reference
1 cm
100%
2 cm
25%
3 cm
11.1%
5 cm
4%
Why This Matters
In brachytherapy, dose drops incredibly fast near the source. 1cm → 2cm cuts dose by 75%!
For radiation safety, every step back significantly reduces exposure.
Challenges
0
points
0 / 11 completed
All Challenges
Level 1: Basic Understanding
Level 2: Double Trouble
Level 3: Safety Zone
Level 4: Brachytherapy Planning
Level 5: Speed Round