BioMed Research International / 2018 / Article / Tab 2

Research Article

The Dosimetric Impact of Shifts in Patient Positioning during Boron Neutron Capture Therapy for Brain Tumors

Table 2

Mean tumor dose () and 80 % dose () with a lateral shift (LS) of the patient head model parallel to the beam exit surface and with an outward shift (OS) with an air gap between the patient head model and the beam exit surface.

Tumor
depth & dose
Baseline
Gy-Eq
LS1
Gy-Eq
(± SD)
LS2
Gy-Eq
(± SD)
LS3
Gy-Eq
(± SD)
LS1 vs. Baseline
P-value
LS2 vs. Baseline
P-value
LS3 vs. Baseline
P-value
OS1
Gy-Eq
(± SD)
OS2
Gy-Eq
(± SD)
OS3
Gy-Eq
(± SD)

24.4524.10
(± 0.23)
23.13
(± 0.34)
21.73
(± 0.24)
0.02< 0.001< 0.00123.3021.8420.74
20.0019.92
(± 0.19)
18.72
(± 0.62)
17.84
(± 0.19)
0.220.01< 0.00119.3318.3417.15

20.6820.55
(± 0.24)
19.93
(± 0.34)
18.85
(± 0.44)
0.170.010.00219.7018.9218.08
20.0019.89
(± 0.24)
18.74
(± 0.84)
17.83
(± 0.51)
0.120.030.00219.1118.2817.47

D: dose; LS1: 1 cm lateral shift; LS2: 2 cm lateral shift; LS3: 3 cm lateral shift; OS1: 1 cm outward shift; OS2: 2 cm outward shift; OS3: 3 cm outward shift. The mean doses reported for LS1, LS2, and LS3 represent the mean values of the doses for left/right and superior/inferior shifts.

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