Schematic representation of experimental configuration.
Ratio of measurements without to with carbon fiber in the beam expressed as a function of angle of incidence for values measured experimentally and predicted theoretically.
Axial CT scan of the carbon fiber couch insert with signal intensity profile positions.
Average of ten signal intensity profiles taken at three positions across the couch insert in the axial CT scan.
Dose plan for a sarcoma patient at Cookridge Hospital, using the posterior oblique field through the carbon fiber couch insert, gantry angle .
The problem of potential overdose to tissue that is irradiated by the unattenuated field with the application of a correction factor.
Attenuation correction factors for the replicated clinical example with lateral couch insert displacements, where denotes a shift away from the gantry and denotes a shift towards the gantry.
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