نتایج جستجو برای: 2D Plan

تعداد نتایج: 183226  

Journal: :iranian journal of radiation research 0
z. falahatpour department of medical radiation engineering, shahid beheshti university, tehran, iran s.m.r. aghamiri department of medical radiation engineering, shahid beheshti university, tehran, iran r. anbiaee department of radiotherapy and oncology, imam hossein hospital, tehran, iran

background: tangential irradiation of intact breast is one of the most common procedures performed in any radiotherapy center. this method is performed by using 2d and 3d treatment planning. the aim of this study was to compare 2d with 3d plans in breast conserving radiotherapy. homogeneity of isodose, and lung received dose were compared. materials and methods: twenty patients with breast canc...

Journal: :iranian journal of medical physics 0
zahra falahatpour m.sc. graduate of medical radiation, nuclear engineering dept., faculty of nuclear engineering, shahid beheshti university, tehran, iran seyed mahmood reza aghamiri associate professor, nuclear engineering dept., faculty of nuclear engineering, shahid beheshti university, tehran, iran robab anbiaee assistant professor, radiotherapy and oncology dept., emam hossein hospital, shahid beheshti university, tehran, iran

introduction: breast conserving radiotherapy is one of the most common procedures performed in any radiation oncology department. a tangential parallel-opposed pair is usually used for this purpose. this technique is performed using 2d or 3d treatment planning systems. the aim of this study was to compare 2d treatment planning with 3d treatment planning in tangential irradiation in breast conse...

K Srivastava M L B Bhatt, N K Painuly N Singh, S P Mishra S Singh, Sh Srivastava,

Background: Brachytherapy treatment planning in cervix carcinoma patients using two dimensional (2D) orthogonal images provides only point dose estimates while CT-based planning provides volumetric dose assessment helping in understanding the correlation between morbidity and the dose to organs at risk (OARs) and treatment volume. Objective: Aim of present study is to compare Internationa...

2016
Guoyan Zheng Steffen Schumann Alper Alcoltekin Branislav Jaramaz Lutz-Peter Nolte

In clinical routine surgeons depend largely on 2D x‐ray radiographs and their experience to plan and evaluate surgical interventions at the knee. Numerous studies have shown that pure 2D x‐ray radiography based measurements are not accurate due to the error in determining accurate radiography magnification and the projection characteristics of 2D radiographs. Using 2D x‐ray radiographs to plan ...

R. Anbiaee, S.M.R. Aghamiri, Z. Falahatpour,

Background: Tangential irradiation of intact breast is one of the most common procedures performed in any radiotherapy center. This method is performed by using 2D and 3D treatment planning. The aim of this study was to compare 2D with 3D plans in breast conserving radiotherapy. Homogeneity of isodose, and lung received dose were compared. Materials and Methods: Twenty patients with br...

2015
Jung Ae Lee Yong Chan Ahn Do Hoon Lim Hee Chul Park Margarita S. Asranbaeva

PURPOSE The purpose of this study is to investigate the dosimetric and clinical influence of computed tomography-based (3-dimensional [3D]) simulation versus conventional 2-dimensional (2D)-based simulation in postoperative chemoradiotherapy (CRT) for patients with advanced gastric cancer in terms of parallel opposed anteroposterior-posteroanterior field arrangement. MATERIALS AND METHODS A r...

2013
Takashi Mizowaki Kenji Takayama Kazuo Nagano Yuki Miyabe Yukinori Matsuo Shuji Kaneko Masaki Kokubo Masahiro Hiraoka

The Vero4DRT (MHI-TM2000) is a newly designed unique image-guided radiotherapy system consisting of an O-ring gantry. This system can realize a new irradiation technique in which both the gantry head and O-ring continuously and simultaneously rotate around the inner circumference of the O-ring and the vertical axis of the O-ring, respectively, during irradiation. This technique creates three-di...

2011
Daniela Wagner Hilke Vorwerk

PURPOSE To verify the dose distribution and number of monitor units (MU) for dynamic treatment techniques like volumetric modulated single arc radiation therapy-Rapid Arc-each patient treatment plan has to be verified prior to the first treatment. The purpose of this study was to develop a patient related treatment plan verification protocol using a two dimensional ionization chamber array (Mat...

Journal: :Journal of surgical education 2017
Caitlin T Yeo Andrew MacDonald Tamas Ungi Andras Lasso Diederick Jalink Boris Zevin Gabor Fichtinger Sulaiman Nanji

OBJECTIVE A fundamental aspect of surgical planning in liver resections is the identification of key vessel tributaries to preserve healthy liver tissue while fully resecting the tumor(s). Current surgical planning relies primarily on the surgeon's ability to mentally reconstruct 2D computed tomography/magnetic resonance (CT/MR) images into 3D and plan resection margins. This creates significan...

2002
Kishalay Kundu Marie desJardins Penny Rheingans

Artificial Intelligence (AI) planning techniques, particularly hierarchical task network (HTN) planners, can produce very complex plans, with many sequential and parallel actions decomposed into multiple levels of abstraction. Most such planners provide only a twodimensional (2D) display of such plans which is typically limited to visualization of one layer of the plan at a time. These 2D displ...

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