Evaluation of Lung Inhomogeneity Correction Using CT RT Planning Computer : International Session Abstracts of 45th Annual Meeting

概要

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Sections 16, 17, and 18 of Alderson Rando phantom were imaged using a Toshiba TCT 80-A CT scanner and dose distribution curves were prepared using the Toshiba TRP-02A treatment planning system of the Jose R. Reyes Memorial Medical Center. Exposures were made and doses were measured using TLDs which were then intercompared to computer calculated values. Up to 6% deviation was obtained. The lung densities of 20 patients and the densities of various materials embedded in a locally made phantom were determined from CT scan data. The density values for normal lung were found to be lower than the recommended value of 0.3g/cc and consistently lower than that of Alderson Rando phantom. Using the density values we obtained, we produced treatment plans which were compared to treatment plans produced using standard density values. The results are presented and analyzed.
公益社団法人日本放射線技術学会の論文
1989-03-01