title: On the Feasibility of Verification of 3D Dosimetry Near Brachytherapy Sources Using PRESAGE/Optical-CT.
abstract: PURPOSE: The feasibility of using the PRESAGE/Optical-CT system for 3D dosimetry verification around a brachytherapy source is investigated.  METHOD AND MATERIALS: Brachytherapy dose distributions were obtained by irradiation of cylindrical PRESAGE volumes 6cm in diameter by 8cm height with a GammaMed 12i Ir-192 HDR unit (Varian Medical Systems). A narrow channel on the central axis was created by setting a steel catheter in the Presage during manufacture, enabling measurements close to the source (~3mm).  RESULTS: Comparison of dose line profiles shows good agreement between PRESAGE and verified calculated dose calculation, in both high and low dose regions.  CONCLUSION: The PRESAGE/Optical-CT shows good potential in verification of 3D dose distributions around brachytherapy sources.
authors.affiliation: Duke University Medical Center, Durham, NC, 27710.
authors.forename: M
authors.initials: M
authors.lastname: Pierquet
authors.forename: O
authors.initials: O
authors.lastname: Craciunescu
authors.forename: B
authors.initials: B
authors.lastname: Steffey
authors.forename: H
authors.initials: H
authors.lastname: Song
authors.forename: M
authors.initials: M
authors.lastname: Oldham