665 / 1674
Technical Considerations
•
CW Shield
Rationale : Protection of healthy tissues
Shield thickness: [3 to 5 g/cm²]
High Z material alone : too much backscattered electrons
Low Z material alone : too thick
A composite shield is needed
Our shield designs (4,46 and 4,28 g/cm²):
4 mm
Al
3 mm
Pb
4 mm
Al
4 mm
Steel