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We have studied the procedure commonly recommended by dosimetry protocols for the determination of the absorbed dose in water for low-energy x-rays beams, generated with potentials up to 150 kVp. X-ray beams with different spectra obtained with the XCOMP5R code were transported using the Monte Carlo code PENELOPE in order to calculate backscatter factors and mass-energy absorption coefficients. We have analyzed the uncertainty in the absorbed doses, calculated using the half-value layer to characterize the x-ray beams, due to the uncertainties in both backscatter factors and mass-energy absorption coefficients. We have found that this uncertainty is larger than 5% and can reach values above 11% for some HVL(1) values. The characterization of these doses with the homogeneity coefficient or the generating potential, in addition to the half-value layer is also studied. Using HVL(1) and the kVp, the absorbed dose to water can be reproduced to within 3% for all spectra.
U Chica, and
M Anguiano, and
A M Lallena
August 1957,
Stanford medical bulletin,
U Chica, and
M Anguiano, and
A M Lallena
November 2002,
Physics in medicine and biology,
U Chica, and
M Anguiano, and
A M Lallena
November 2020,
Medical physics,
U Chica, and
M Anguiano, and
A M Lallena
November 2021,
Medical physics,
U Chica, and
M Anguiano, and
A M Lallena
February 2016,
Physics in medicine and biology,
U Chica, and
M Anguiano, and
A M Lallena
November 1978,
Strahlentherapie,
U Chica, and
M Anguiano, and
A M Lallena
February 1980,
Strahlentherapie,
U Chica, and
M Anguiano, and
A M Lallena
November 1973,
Physics in medicine and biology,
U Chica, and
M Anguiano, and
A M Lallena
January 1981,
Medical physics,
U Chica, and
M Anguiano, and
A M Lallena
February 1997,
The British journal of radiology,
