PO-0817: Anatomical robust optimization to deal with variation in nasal cavity filling during IMPT
نویسندگان
چکیده
منابع مشابه
A deformable template method for describing and averaging the anatomical variation of the human nasal cavity
BACKGROUND Understanding airflow through human airways is of importance in drug delivery and development of assisted breathing methods. In this work, we focus on development of a new method to obtain an averaged upper airway geometry from computed tomography (CT) scans of many individuals. This geometry can be used for air flow simulation. We examine the geometry resulting from a data set consi...
متن کاملSU-E-T-565: Effectiveness of Robust Optimization in Head and Neck IMPT Dose Distributions.
PURPOSE The effectiveness of IMPT may be significantly diminished by range and patient setup uncertainties. The purpose of this presentation is to evaluate the ability of robust optimization methods to desensitize H&N IMPT plans to uncertainties and their impact on plan optimality. METHODS We use a robust optimization method, in which the objective function value for a given iteration is comp...
متن کاملAnatomical analysis of nasal obstruction: nasal cavity of patients complaining of stuffy nose.
OBJECTIVES/HYPOTHESIS To evaluate the relationship between subjective symptoms of nasal obstruction and the corresponding nasal anatomical parameters using paranasal computed tomography (PNS CT). STUDY DESIGN Retrospective chart review at a tertiary referral center. METHODS We studied 277 patients who underwent evaluation by the Nasal Obstruction Symptom Evaluation scale and a visual analog...
متن کاملIdentify Coping Mechanisms to Deal with Stressors in Military Personnel
Background and Aim: The military personnel face many stressors. This study aimed to identify coping mechanisms in the face of stressors in military personnel. Methods: This is a cross-sectional study and the sample was 384 of staffs affiliated to Iranian Navy Force, who were selected by cluster random sampling. Data collection tools were demographic questionnaire, a military stressors questionn...
متن کاملEvaluation of Anatomical Variations of Nasal Cavity and Paranasal Sinuses with Cone Beam Computed Tomography
Material and Method: In this study, 251 patients’ nasal cavities and paranasal sinuses were evaluated using CBCT (Newtom 5G, Verona Italy) images in terms of anatomical variations. The high-resolution (voxel and slice thickness: 0.2 mm) multiplanar reformatting images (MPR) were used for the evaluation of the variations. Results: The most common anatomical variation of nasal cavity and paranasa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Radiotherapy and Oncology
سال: 2017
ISSN: 0167-8140
DOI: 10.1016/s0167-8140(17)31254-9