title: Single- and double-plane iridium-192 interstitial implants: implantation guidelines and dosimetry.
abstract: Computerized dosimetric studies of single- and double-plane iridium-192 (Ir-192) planar implants were performed. With respect to dose homogeneity, we found that the optimal source and ribbon separation for single-plane implants was 1.0 cm. For double-plane implants, the preferred ribbon and plane separation was 1.5 cm, maintaining a 1-cm separation for the sources. Using these separations, standard dose rate curves for single- and double-plane Ir-192 implants were generated by computer calculations. These standard curves are useful for quickly and fairly accurately estimating the dose from any size planar implant, without requiring more time-consuming individual computer dosimetry. We believe that the curves will prove to be of practical clinical value to physicists and radiotherapists.
mesh_terms: D001918:Brachytherapy / Q000379:methods*; D007495:Iridium / Q000008:administration & dosage*; D011868:Radioisotopes / Q000008:administration & dosage*; D011879:Radiotherapy Dosage
chemical_list: D011868:Radioisotopes; D007495:Iridium