نتایج جستجو برای: 2d and 3d dimensional radiotherapy

تعداد نتایج: 16973860  

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...

alireza Amouheidari parvaneh shokrani, Somayeh karimi

Introduction: The purpose of this study was to develop a statistical model for prediction of radiation induced sensorineural hearing loss (SNHL) induced by radiotherapy in patients with brain tumors.   Materials and Methods: CT scan of 18 patients (10 males and 8 females) with brain tumor who were referred to Radiation Center of Milad Hospital in Isfahan in 2...

Journal: :international journal of hematology-oncology and stem cell research 0
seyed hadi mousavi phd student of hematology, department of hematology and blood banking, faculty of medical sciences, tarbiat modares university, tehran, iran. saeid abroun associated professor of hematology, department of hematology and blood banking, faculty of medical sciences, tarbiat modares university, tehran, iran. masoud soleimani associated professor of hematology, department of hematology and blood banking, faculty of medical sciences, tarbiat modares university, tehran, iran. seyed javad mowla associated professor of genetic, department of molecular genetics, faculty of biological sciences, tarbiat modares university, tehran, iran.

allogeneic hematopoietic stem cell transplantation is used in the treatment of patients suffering from hematologic and non-hematologic disorders, but the application is limited by the identification of a suitable donor. umbilical cord blood (ucb) is an alternative source of hematopoietic stem cell (hsc) transplantation. despite all advantages, the limited cell dose is one of the  major obstacle...

جلالی, تهمینه , محمدی, احمد ,

The accuracy of improved two dimensional finite difference time domain method (2D FDTD) is verified by comparing with 3D FDTD method and experimental data. The optimized 60° photonic crystal waveguide bend, used in this study as a test case, is composed of InPGaAs/InP material and air holes and TE polarization is considered. The photonic crystal waveguide bend transmission data was measured...

اصفهانی, مهبد , حداد, پیمان , سمیعی, فرهاد , عصمتی, ابراهیم , عقیلی, مهدی , مشتاقی, مریم , ندائی, حسنعلی ,

Background: The current standard of adjuvant management for gastric cancer after curative resection based on the results of intergroup 0116 is concurrent chemoradiation. Current guidelines for designing these challenging fields still include two-dimensional simulation with simple AP-PA parallel opposed design. However, the implementation of radiotherapy (RT) remains a concern. Our objective was...

2016
Xiaodong Wu Alan Pollack

Purpose: Two-dimensional (2D) high-dose GRID radiotherapy has shown effective tumor control in the clinical setting, and radiobiological data suggest potent bystander/abscopal effects with this technique. We present a new technical concept using modern radiation therapy instrumentation to advance traditional GRID treatment to modern three-dimensional (3D) high-dose LATTICE radiotherapy (LRT). M...

2016
Elton Trigo Teixeira Leite Rafael Tsuneki Ugino Marco Antônio Santana Denis Vasconcelos Ferreira Maurício Russo Lopes Edilson Lopes Pelosi João Luis Fernandes da Silva Heloisa de Andrade Carvalho

OBJECTIVE To evaluate incidental irradiation of the internal mammary lymph nodes (IMLNs) through opposed tangential fields with conventional two-dimensional (2D) or three-dimensional (3D) radiotherapy techniques and to compare the results between the two techniques. MATERIALS AND METHODS This was a retrospective study of 80 breast cancer patients in whom radiotherapy of the IMLNs was not indi...

Ebrahimi B Fatehi R, Favayedi R Sadr Z, Shahhoseini M

Background: Setting up an in vitro follicle culture system that resembles in vivo ovary condition has high value in research. Additionally, expression evaluation of folliculogenesis involved genes could lead us to the designing of better culture system. Materials and Methods: ovaries of 12-day-old female NMRI mice were removed, 100-130 μm pre-antral follicles were mechanically isolated from fre...

امیری زاده, ناصر, حفیظی, مریم, سلیمانی, مسعود, فروزنده مقدم, مهدی, هاشمی, زهراالسادات,

Background: Bone Marrow Transplantations (BMT) are limited by low CD34+ cell counts in umbilical cord blood (UCB) and these cells need to be expanded for success in such procedures. To achieve this goal, ex vivo expansion of hematopoietic stem cells (HSCs) by enhancing their self-renewal activity on demineralized bone matrix (DBM) scaffold coated with mesenchymal progenitor cells (MPCs) and unr...

Journal: :Journal of the Egyptian National Cancer Institute 2009
Nesreen Ahmad Gerges Attia Ehsan El-Ghoneimy Aida Radwan Samy El-Badawy

OBJECTIVES In pediatric radiotherapy, the enhanced radiosensitivity of the developing tissues combined with the high overall survival, raise the possibility of late complications. The present study aims at comparing two dimensional (2D) and three dimensional (3D) planning regarding dose homogeneity within target volume and dose to organs at risk (OARs) to demonstrate the efficacy of 3D in decre...

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