PMID: 9422578Jan 9, 1998Paper

A feasibility study of automated inverse treatment planning for cancer of the prostate

International Journal of Radiation Oncology, Biology, Physics
L ReinsteinZ Fuks

Abstract

The development of automated "inverse planning," utilizing intensity-modulated radiation therapy (IMRT) raises the question of whether this new technique can provide a practical and efficient means of dose escalation in conformal treatment of cancer of the prostate. The purpose of this feasibility study was to determine a single set of inverse-planning parameters that can be used for a variety of different prostate patient geometries to automatically generate escalated dose (> or = 81 Gy) IMRT plans that satisfy normal tissue constraints for rectal and bladder walls. We studied a subset of the 46 patients who were previously treated at Memorial Sloan Kettering Cancer Center (MSKCC) to a total dose of 81 Gy using a 3D conformal approach. Six patients were selected for our study and replanned using an analytical inverse-planning algorithm (referred to as OPT3D) applied to 8 intensity modulated, co-axial radiation beams. A set of more than a dozen inverse planning parameters were adjusted by trial and error until the resulting dose distributions satisfied the critical organ dose-volume constraints imposed by our study rules (D30 < or = 75.6 Gy and D10 < or = 80 Gy for the rectal wall; D15 < or = 80 Gy for the bladder wall) for the...Continue Reading

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