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Q:
Centre X uses
“BT schedule of 4x7 Gy to CTV HR”
.
What is
prescribed dose
/ fraction to CTV HR in their patients?
A:
A. 10 Gy, according to Linear Quadratic model
B. 7 Gy
C. 28 Gy
D. I can’t tell, but all of the above answers are likely wrong.
Prescribing, Recording & Reporting of D & V
Prescription – achieved D
V
and V
D
parameters after planning
Planning aims – desired D
V
and V
D
parameters
Delivered treatment –D
V
and V
D
parameters delivered
…the term “4 x 7 schedule” doesn’t tell us much…
D90 > 10 Gy EQD2
D90 = 10.4 +/- 0.6 Gy EQD2
???
i. e.
i. e.
i. e.