1114 / 1544
DMLC tracking
80
100
Gel in motion
Static gel
PTW in motion
Static PTW
2D Array in motion
atic 2D Array
Overall, the measurements carried out using a 2D ion chamber array
agreed well with the gel measurements (Figure 17). However, due to the
limited spatial resolution of the 2D array a detailed comparison was not
possible.
80
100
Static gel
Static PTW
Tracked gel
Tracked PTW
dose [%]
2D Array in motion
Static 2D Array
2D Array
a)
b)
c)
Figure 16.
Dose distributions measured using gel dosimetry with and without the
DMLC-tumour tracking connected.
-30 -20 -10 0 10 20 30
20
40
60
80
100
Gel in motion
Static gel
PTW in motion
Static PTW
Motion extent [mm]
2D Array in motion
tic 2D Array
Overall, the measurements carried out using a 2D ion chamber array
agreed well with the gel measurements (Figure 17). However, due to the
limited spatial resolution of the 2D array a detailed comparison was not
possible.
a)
b)
Figure 17.
Relative absorbed dose profiles extracted from nPAG (lines) and 2D ion
chamber array (dots) measurement data, performed with the detectors in motion or in a
-30 -20 -10 0 10 20 30
20
40
60
80
100
Static gel
Static PTW
Tracked gel
Tracked PTW
Relative absorbed dose [%]
Motion extent [mm]
2D Array in motion
Static 2D Array
2D Array
a)
b)
c)
Figure 16.
Dose distributions measured using gel dosimetry with and without the
DMLC-tumour tracking connected.
This thesis is based on the following papers, hereafter referred to by their
roman numerals:
I
Dose integration characteristics in normoxic polymer gel
dosimetry investigated using sequential beam irradiation
Anna Karlsson, Helen Gustavsson*, Sofie Månsson**, Kim B
McCauley and Sven Å.J. Bäck
Phys. Med. Biol. 52: 4697-4706, 2007
II
Verification of dynamic radiotherapy: the potential for 3D
dosimetry under respiratory-like motion using polymer gel
Sofie Ceberg, Anna Karlsson, Helen Gustavsson, Lena Wittgren
and Sven Å.J. Bäck
Phys. Med. Biol. 53: N387–N396, 2008
Ceberg et al