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. Author manuscript; available in PMC: 2006 Oct 18.
Published in final edited form as: Med Phys. 2003 Apr;30(4):623–634. doi: 10.1118/1.1559835

FIG. 11.

FIG. 11

Optical-CT images of the relative dose distribution delivered in a PAG after irradiation by focused photons (40-80 KeV)emitted by the x-ray lens (shown in Fig. 4). The cylindrical gel flask is ∼8 cm in diameter and the slices are 1 mm apart. The in-plane resolution is 1×1 mm2. The comprehensive 3D measurement presented here would be very difficult to achieve with conventional dosimeters because of the low energy of the radiation and the small dimensions of the field.