A lesion of the lower lip is to be treated with 100 kV X rays using an 8x8 cm2 applicator at 21 cm SSD with a cut-out 6x6 cm. The output in air for 8x8 cm2 applicator is 285 cGy/min at 20 cm SSD. If 4500 cGy in 18 fractions is prescribed to the surface, the timer setting should be:

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Author:Robert L. Boylestad
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A lesion of the lower lip is to be treated with 100
kV X rays using an 8x8 cm2 applicator at 21 cm
SSD with a cut-out 6x6 cm. The output in air for
8x8 cm2 applicator is 285 cGy/min at 20 cm
SSD. If 4500 cGy in 18 fractions is prescribed to
the surface, the timer setting should be:
Transcribed Image Text:A lesion of the lower lip is to be treated with 100 kV X rays using an 8x8 cm2 applicator at 21 cm SSD with a cut-out 6x6 cm. The output in air for 8x8 cm2 applicator is 285 cGy/min at 20 cm SSD. If 4500 cGy in 18 fractions is prescribed to the surface, the timer setting should be:
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