Abstract
In an earlier paper we investigated the influence of the crossing needle location on the dose distribution of radium implants with one uncrossed end (Doss and Richman, 1979). It was found that in all cases considered the optimum coverage of radiation dose occurred when the crossing needle was either at or slightly beyond the physical ends of the parallel needles. The quality of the implant was judged by plotting the fraction of the implant area receiving 85% of the maximum dose against the distance of the crossing needle beyond the physical ends. Implant geometries which achieve a dosage of 6000 cGy (rad) in seven days were sought.
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