Head-And-Neck(66Gy/33#) |
Grid Sizes(mm) |
OrgansAt Risk |
3.0 |
5.0 |
10.0 |
|
D1cc(Gy) |
Dmax(Gy) |
Mean Dose(Gy) |
D1cc(Gy) |
Dmax(Gy) |
Mean Dose(Gy) |
D1cc(Gy) |
Dmax(Gy) |
Mean Dose(Gy) |
Spinal Cord
|
|
|
|
|
|
|
|
|
|
Spinal cord PRV
|
|
|
|
|
|
|
|
|
|
Brain Stem
|
|
|
|
|
|
|
|
|
|
Brain Stem PRV
|
|
|
|
|
|
|
|
|
|
Parotid
|
|
|
|
|
|
|
|
|
|
|
(a) |
Pelvis(Carcinoma Cervix)[50Gy/25#] |
Grid Sizes(mm) |
Organs At Risk |
3.0 |
5.0 |
10.0 |
|
D1cc (Gy) |
Dmax (Gy) |
Mean Dose (Gy) |
D1cc (Gy) |
Dmax (Gy) |
Mean Dose (Gy) |
D1cc (Gy) |
Dmax (Gy) |
Mean Dose (Gy) |
Bladder
|
|
|
|
|
|
|
|
|
|
Rectum
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Lt.FH
|
|
|
|
|
|
|
|
|
|
Bowel |
D195cc(Gy) |
Dmax (Gy) |
Mean Dose (Gy) |
D195cc(Gy) |
Dmax(Gy) |
Mean Dose (Gy)
|
D195cc(Gy) |
Dmax (Gy) |
Mean Dose (Gy) |
|
|
|
|
|
|
|
|
|
|
|
(b) |
Brain(54Gy/27#) |
Grid Size (mm) |
Organs at Risk |
3 |
|
|
5 |
|
|
10 |
|
|
|
D1cc (Gy) |
Dmax (GY) |
Mean Dose(GY) |
D1cc (Gy) |
Dmax (GY) |
Mean Dose(GY) |
D1cc (Gy) |
Dmax(GY) |
Mean Dose(GY) |
optic chiasm |
|
|
|
|
|
|
|
|
|
Case1 |
20.11 |
29.32 |
|
21.13 |
26.98 |
|
21.57 |
28.36 |
|
Case2 |
53.0 |
53.82 |
|
51.39 |
55.21 |
|
51.39 |
53.69 |
|
Case3 |
51.21 |
55.23 |
|
51.39 |
55.21 |
|
51.48 |
55.33 |
|
Case4 |
35.66 |
49.65 |
|
35.74 |
46.96 |
|
35.07 |
46.96 |
|
Optic chiasm PRV |
|
|
|
|
|
|
|
|
|
Case1 |
26.62 |
35.16 |
|
27.03 |
34.37 |
|
26.97 |
30.11 |
|
Case2 |
53.69 |
55.64 |
|
55.61 |
57.68 |
|
53.69 |
57.18 |
|
Case3 |
55.25 |
56.57 |
|
55.66 |
56.34 |
|
55.39 |
55.78 |
|
Case4 |
47.36 |
53.10 |
|
46.97 |
51.87 |
|
47.88 |
47.50 |
|
BRAIN STEM |
|
|
|
|
|
|
|
|
|
CASE1 |
52.17 |
53.36 |
|
53.28 |
54.76 |
|
53.23 |
54.75 |
|
CASE2 |
52.78 |
59.10 |
|
54.23 |
55.88 |
|
55.81 |
56.95 |
|
CASE3 |
35.75 |
37.28 |
|
36.02 |
37.23 |
|
16.77 |
37.04 |
|
CASE4 |
54.00 |
54.68 |
|
53.59 |
53.98 |
|
54.69 |
55.19 |
|
BRAIN STEMPRV |
|
|
|
|
|
|
|
|
|
CASE1 |
53.92 |
55.35 |
|
54.82 |
55.93 |
|
53.75 |
55.75 |
|
CASE2 |
54.61 |
55.90 |
|
55.35 |
55.96 |
|
56.63 |
58.45 |
|
CASE3 |
50.16 |
52.15 |
|
50.63 |
51.62 |
|
50.97 |
51.79 |
|
CASE4 |
54.12 |
54.77 |
|
53.77 |
54.21 |
|
54.92 |
55.19 |
|
Rt.Eye |
|
|
|
|
|
|
|
|
|
Case1 |
|
6.27 |
4.81 |
|
7.83 |
5.66 |
|
6.56 |
5.06 |
Case2 |
|
31.08 |
14.39 |
|
28.34 |
14.32 |
|
14.04 |
26.9 |
Case3 |
|
40.29 |
22.46 |
|
38.33 |
21.96 |
|
34.15 |
22.4 |
Case4 |
|
22.64 |
7.27 |
|
22.44 |
7.31 |
|
19.78 |
7.31 |
Lt.Eye |
|
|
|
|
|
|
|
|
|
Case1 |
|
17.18 |
15.10 |
|
17.93 |
15.8 |
|
17.98 |
16.28 |
Case2 |
|
44.60 |
19.34 |
|
42.28 |
19.66 |
|
38.91 |
15.93 |
Case3 |
|
40.09 |
20.17 |
|
38.81 |
19.79 |
|
33.05 |
19.89 |
Case4 |
|
15.06 |
4.50 |
|
14.88 |
4.40 |
|
14.08 |
4.40 |
|
(c) |
Table 2: (a), (b) & (c) summarizes dose distribution changes on OAR with varying grid sizes for different sites viz. Head and Neck, Pelvis, Brain, which showed some significant variation between planning CT. |