There are quite few different radiation delivery techniques besides the standard fractionization. Even with standard fractions, I don't think it's the same delivery over the course of the 7 weeks of treatment. One reason is radiation declines in tumor kill rate after 25 treatments or 5 weeks, due to tumor regeneration, oxygenation, and more is needed to kill the tumor, and that why you see treatments for 6 and 5 7 weeks that are shorter in durstion, and more effective in some studies, and hardly any for 8 weeks, which more is not better. How this is done in fractions, volume, percentage, other, I don't know. Only the wizard does smile

Altered fractionization
Concomitant boost
Split course
Hyperfractionization
Hypofractionation
Others

10/09 T1N2bM0 Tonsil
11/09 Taxo Cisp 5-FU, 6 Months Hosp
01/11 35 IMRT 70Gy 7 Wks
06/11 30 HBO
08/11 RND PNI
06/12 SND PNI LVI
08/12 RND Pec Flap IORT 12 Gy
10/12 25 IMRT 50Gy 6 Wks Taxo Erbitux
10/13 SND
10/13 TBO/Angiograph
10/13 RND Carotid Remove IORT 10Gy PNI
12/13 25 Protons 50Gy 6 Wks Carbo
11/14 All Teeth Extract 30 HBO
03/15 Sequestromy Buccal Flap ORN
09/16 Mandibulectomy Fib Flap Sternotomy
04/17 Regraft hypergranulation Donor Site
06/17 Heart Attack Stent
02/19 Finally Cancer Free Took 10 yrs