![]() ![]() Each plan ( base plan ) was optimized without using the MU Objective tool, and it was re-optimized with different values of the Maximum MU ( MaxMU ) parameter of the MU Objective tool. Forty prostate plans, 20 gynecological plans and 20 head and neck plans designed with VMAT were retrospectively studied. The treatment planning system Eclipse (Varian Medical Systems, Palo Alto, CA) includes a control mechanism for the number of monitor units of volumetric modulated arc therapy (VMAT) plans, named the MU Objective tool. This work aims to achieve the highest possible monitor units (MU) reduction using the MU Objective tool included in the Eclipse treatment planning system, while preserving the plan quality. Jiménez-Puertas, Sara Sánchez-Artuñedo, David Hermida-López, Marcelino © 2012 American Association of Physicists in Medicine.Īssessment of the Monitor Unit Objective tool for VMAT in the Eclipse treatment planning system. The proposed planning and delivery simplifies the compensation and blocking to achieve uniform dose distributions and reduces the treatment time. Good agreement (<6%) between the predicted and measured doses was obtained. The feasibility of using the 'Irregular Surface Compensator' feature of Eclipse TPS for TBI treatment planning was demonstrated. OSLD measurements and the Eclipse TPS predictionswere 200.4/195.0, 162.2/168.9, and 196.1/208.9 cGy for the neck, lung and the umbilicus respectively. A single fraction of 2Gy was delivered and the in-vivo measurements were performed in the neck, lung and the umbilicus by using OSLDs. This TBI treatment technique was tested using a Rando phantom in Head First Supine position with lateral beams at SSD=250cm.The calculated fluence were edited so that the lung received <âˆ❁0Gy for 12Gy prescription. The fluence map is delivered with dynamic MLCs. We investigated the use of ISC planning feature of Eclipse TPS which is an electronic compensation method that calculates a fluence map based on the body contour from the CT image. This method presents a challenge during the treatment delivery and prolongs the treatment time due to patient setup, in-vivo on-line dosimetric monitoring and the adjustment of the compensators frequently during the treatment. ![]() To mitigate this problem, physical compensators and blocks are used during the treatment for different body parts and lungs. Another challenge is to keep the lung dose below 10Gy to avoid complications. ![]() Different body parts with different thicknesses compared to the umbilicus separation may receive higher or lower doses compared to the prescribed dose. TBI treatments require that the whole body receives within +-10% of the prescribed dose. To investigate the feasibility of using the Irregular Surface Compensator (ISC) planning feature of the Eclipse treatment planning system (TPS) for Total Body Irradiation (TBI). SU-E-T-436: Feasibility of Using the 'Irregular Surface Compensator' Planning Feature of the Eclipse TPS for Total Body Irradiation (TBI) Treatment Planning.Īyan, A Lu, L Rong, Y Cunningham, M Weldon, M Welliver, M Woollard, J Gupta, N ![]()
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