Megavoltage X-Ray Imaging Based on Cerenkov Effect: A New Application of Optical Fibres to Radiation Therapy

Table 2

Detection efficiencies of CPID for three clinical beams. Statistical uncertainty for each value is ~0.8%.

d/cm	6 MV beam	10 MV beam	18 MV beam
10	39.4%	40.7%	40.2%
20	58.3%	62.0%	61.9%
30	67.1%	73.2%	73.8%