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- W4249388081 abstract "A technique for manufacturing precise custom blocks is described. Using the tracing stylus of the mold making machine, reference markers are cut into the lateral borders of the polystyrene mold after the cavities for the blocks have been made. These markers are aligned with the central ray cross hair of the shadow tray when the blocks are mounted on the tray. The ability of the technique to enhance precision has been verified in laboratory tests by intentionally introducing small imperfections into a mold making machine and checking the positional accuracy of the mounted blocks. The clinical performance has been tested by evaluating 47 check films of blocks for 16 randomly selected patients. The average positional error of individual blocks, projected to the isocenter, was less than one mm. The average time needed to cut the reference markers was 25 seconds. Implementing the technique required only minor modifications of a commercial mold making machine. PACS number(s): 87.53.–j, 87.56.–v" @default.
- W4249388081 created "2022-05-12" @default.
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- W4249388081 date "2001-07-01" @default.
- W4249388081 modified "2023-10-11" @default.
- W4249388081 title "A self-correcting method for improving the precision of beam blocks" @default.
- W4249388081 doi "https://doi.org/10.1120/1.1383088" @default.
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