PO-0951: What CTV-to-PTV margins are required for esophageal cancer radiotherapy?
نویسندگان
چکیده
منابع مشابه
Planning Margins to CTV for Image-Guided Whole Pelvis Prostate Cancer Intensity-Modulated Radiotherapy
Purpose: We investigated the margin recipes with different alignment techniques in the image-guided intensity-modulated radiotherapy (IMRT) of whole pelvis prostate cancer patients. Materials and Methods: Forty-eight computed tomography (CT) scans of eight prostate cancer patients were investigated. Each patient had an initial planning CT scan and 5 consecutive serial CT scans during the course...
متن کاملRetrospective evaluation of CTV to PTV margins using CyberKnife in patients with thoracic tumors
The objectives of this study were to estimate global uncertainty for patients with thoracic tumors treated in our center using the CyberKnife VSI after placement of fiducial markers and to compare our findings with the standard CTV to PTV margins used to date. Datasets for 16 patients (54 fractions) treated with the CyberKnife and the Synchrony Respiratory Tracking System were analyzed retrospe...
متن کاملThe heterogeneous CTV-PTV margins should be given for different parts of tumors during tomotherapy
Objective The purpose of this study was to evaluate CTV-PTV margins of tumors for tomotherapy. Methods Setup errors were analyzed for 151 patients receiving helical tomotherapy treatment. 53 patients had head and neck tumors, 45 had thoracic tumors, 20 had abdominal tumors, and 33 had pelvic tumors. The setup errors were calculated in six directions, i.e. +X (left), -X (right), +Y (head), -Y ...
متن کاملA novel CBCT-based method for derivation of CTV-PTV margins for prostate and pelvic lymph nodes treated with stereotactic ablative radiotherapy
BACKGROUND Traditional CTV-PTV margin recipes are not generally applicable in the situation of stereotactic ablative radiotherapy (SABR) treatments of multiple target volumes with a single isocentre. In this work, we present a novel geometric method of margin derivation based on CBCT-derived anatomical data. METHODS Twenty patients with high-risk localized prostate cancer were selected for re...
متن کاملLong-term experience with reduced planning target volume margins and intensity-modulated radiotherapy with daily image-guidance for head and neck cancer.
BACKGROUND The purpose of this study was to compare outcomes among patients treated by intensity-modulated radiotherapy (IMRT) with daily image-guided radiotherapy (IGRT) for head and neck cancer according to the margins used to expand the clinical target volume (CTV) to create a planning target volume (PTV). METHODS Three hundred sixty-seven consecutive patients were treated with IMRT for sq...
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ژورنال
عنوان ژورنال: Radiotherapy and Oncology
سال: 2018
ISSN: 0167-8140
DOI: 10.1016/s0167-8140(18)31261-1