Mantle field dosimetry comparing 4 MV with cobalt-60
1975
Three off-axis dosimetric parameters were evaluated for identical mantle fields using the Varian 4 MV linear accelerator and a Picker C8M cobalt-60 unit. These parameters were dose distribution, skin dose and integral dose. Comparisons showed higher doses in all three categories with the 4 MV accelerator when the tumor dose is specified at the central axis midline. These results emphasize the importance of off-axis dosimetry with both machines.
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