TY - JOUR

T1 - A three-Gaussian fit of phantom scatter correction data

AU - Van Gasteren, J. J M

AU - Van der Laarse, R.

AU - Venselaar, J. L M

AU - Heukelom, S.

AU - Jager, H. N.

AU - Van Kleffens, H. J.

AU - Westermann, C. F.

PY - 1998/3/31

Y1 - 1998/3/31

N2 - The phantom scatter correction factor S(p), of megavoltage photon beams can be accurately described using a three-Gaussian fit. The model leads to six parameters, with which S(p),(r) is described as a smooth function of the field radius r for beam qualities in the range from 60Co up to 25 MV. The parameters allow S(p), values to be calculated at intermediate beam energies and for any field shape. Calculated S(p)(X, Y) values for rectangular fields (X, Y) can be subsequently used as reference values to compare with measured S(p),(X, Y) values, for example when appraising a new beam.

AB - The phantom scatter correction factor S(p), of megavoltage photon beams can be accurately described using a three-Gaussian fit. The model leads to six parameters, with which S(p),(r) is described as a smooth function of the field radius r for beam qualities in the range from 60Co up to 25 MV. The parameters allow S(p), values to be calculated at intermediate beam energies and for any field shape. Calculated S(p)(X, Y) values for rectangular fields (X, Y) can be subsequently used as reference values to compare with measured S(p),(X, Y) values, for example when appraising a new beam.

UR - http://www.scopus.com/inward/record.url?scp=0031905806&partnerID=8YFLogxK

U2 - 10.1088/0031-9155/43/3/009

DO - 10.1088/0031-9155/43/3/009

M3 - Article

C2 - 9533136

AN - SCOPUS:0031905806

VL - 43

SP - 577

EP - 585

JO - Physics in Medicine and Biology

JF - Physics in Medicine and Biology

SN - 0031-9155

IS - 3

ER -