176 / 1161
Equivalent Uniform Dose - EUD
•
For tumours ‘a’ is negative
➢
Typical range -5 (‘less malignant’) – meningioma
➢
to -15 (‘more malignant’) - chordoma
•
For normal tissues ‘a’ is positive
➢
Parallel - near 1
➢
Serial – larger e.g. up to 20 for spinal cord
➢
‘a’ = 1/n in the LKB formulation