A dose table describing fractions of peripheral volume for 125I volume implants.

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Abstract
A dose table that provides the dose as a function of fractions of peripheral volume for 125I implants [for cancer radiotherapy] is presented. The table is based on seed distributions from 50 actual patient implants. Computer dosimetry was used to determine peripheral doses and dose ranges within implant volumes. The effects of seed distribution were also examined. The patient data and a study of computer-generated randomized seed coordinates within a given volume suggest that matched doses do not depend strongly on the exact position of each seed. The table provides the means for planning an implant to obtain a desired peripheral dose that can be directly compared with the postimplant computer dose calculation.

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