Outlines of the head and neck computational phantoms in 3D with examples of imaging FOVs: (a) ICRP reference male phantom with FOV170×120, (b) ICRP female phantom with FOV145×75, (c) Zubal phantom with FOV100×100, and (d) VCH phantom with FOV60×60.
The reconstructed axial image of the ionization chamber in the water phantom as obtained during the Monte Carlo dose normalization measurement with (a) Accuitomo FOV170×120 and (b) Scanora FOV145×75. The small circle with metal-like intensity present outside of the phantom is the connection cable and the waterproof sleeve of the chamber.
Organ absorbed doses calculated for different phantoms with the large and the medium FOV of the Accuitomo (upper) and the Scanora (lower) at 90 kV. “ET” and “RBM” stand for the extrathoracic tissue and the red bone marrow, respectively.
Organ absorbed doses calculated for different phantoms with FOV60×60 of the two CBCT systems at 90 kV.
Comparison of the organ absorbed dose for the reference male phantom calculated with different FOVs of the Accuitomo at 90 kV.
Calculated effective doses with Accuitomo FOV170×120 at different tube potentials.
The effective doses calculated for the reference male and the VCH phantom with the half-rotation mode of the Accuitomo at 90 kV from different initial angles.
Voxel dose distributions calculated for a typical axial plane of the Zubal phantom with (a) Accuitomo FOV170×120, (b) Scanora FOV145×75, (c) Accuitomo FOV60×60, and (d) Scanora FOV60×60 at 90 kV.
Organ masses (g) of the computational head and neck phantoms.
Protocols to position the imaging FOV in oral and maxillofacial CBCT.
Tissue weighting factors for use in calculation of the effective dose.
The Monte Carlo dose normalization factors for selected exposure settings.
Effective doses (μSv mAs−1) calculated for the phantoms with selected FOVs of the two systems at 90 kV.
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