نتایج جستجو برای: breast dose

تعداد نتایج: 547630  

Ali Neshasteh-Riz Fereshteh Koosha, Ghazale Mansorian Mostafa Robatjazi, Reza Paydar,

Introduction: One of the treatment choices in breast cancer is Intra operative electron beam radiation therapy (IOERT). Due to high dose delivery in this procedure, shielding disk is used to protect organs at risk (OARs). In this study, we evaluate the OARs dose in the breast IOERT using Monte Carlo simulation with and without shielding disk in RANDO phantom. Material and Methods: Simulation ...

ژورنال: سنجش و ایمنی پرتو 2019

Comparison of radiation shields of different thicknesses and structures (especially different particle sizes of their constituents) is helpful to select an appropriate shield for patient protection in medical imaging tests particularly CT-scan. In this study micro- and nano-powders of bismuth were mixed with silicone matrix to make composite radiation shields for breast. The shields were provid...

Mehran Yarahmadi, S Yazdani

Introduction: Breast cancer is the most common cancer among women. Radiotherapy plays an important role in the treatment of breast cancer and essential part of the standard treatment after breast-conserving surgery, routinely done to eliminate the microscopic residual cancer. The heart and lungs are one of the most important organs at risk of breast cancer radiotherapy that th...

Journal: : 2022

Liposomal nanoparticles reduce dose-dependent behavior of paclitaxel against MDA-MB 468 breast cancer

Journal: :iranian journal of medical physics 0
hamidreza shabani m.sc. student of medical physics, department of medical physics, tehran university of medical sciences, tehran, iran mahmood allahverdi associated professor, medical physics dept., tehran university of medical sciences, and radiotherapy physics dept., of the cancer institute, tehran, iran mahbod esfahani physisist of the radiotherapy physics department of the cancer institute, tehran, iran mehdi aghili associate professor, radiotherapy and oncology department of the cancer institute, imam khomeini hospital, tehran, iran abbas takavar professor, medical physics dept., tehran university of medical sciences, tehran, iran mohammd reza taghizade m.sc. of medical physics, imam khomeini medical imaging center, gilan university of medical sciences, some’e-sara, iran

introduction: delivering maximum dose to tumor and minimum dose to normal tissues is the most important goal in radiotherapy. according to icru, the maximum acceptable uncertainty in the delivered dose compared to the prescribed dose should be lower than 5%, and this is because of the relationship between absorbed dose, tumor control and normal tissue damage. absorbed dose accuracy is investiga...

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...

Yarahmdi Mehran Yazdani Sohaila

Introduction: Breast cancer is the most common cancer among women. Radiotherapy plays an important role in the treatment of breast cancer and essential part of the standard treatment after breast-conserving surgery, routinely done to eliminate the microscopic residual cancer. The heart and lungs are one of the most important organs at risk of breast cancer radiotherapy that th...

AR Shirazi, M Oshaghi M Sadeghi, SR Mahdavi

Background: Accelerated partial breast irradiation via interstitial balloon brachytherapy is a fast and effective treatment method for certain early stage breast cancers however skin, chest wall and Lung doses are correlated with toxicity in patients treated with breast brachytherapy.Objective: To investigate the percentage of the dose received by critical organ (skin), thermoluminescence detec...

2015
Vikneswary Batumalai Alexandra Quinn Michael Jameson Geoff Delaney Lois Holloway

INTRODUCTION Correct target positioning is crucial for accurate dose delivery in breast radiotherapy resulting in utilisation of daily imaging. However, the radiation dose from daily imaging is associated with increased probability of secondary induced cancer. The aim of this study was to quantify doses associated with three imaging modalities and investigate the correlation of dose and varying...

Ali Tarighatnia Mohammad Yousefi Sooteh Parinaz Mehnati, Reza Malekzadeh Yagub Khalegi Fard

Introduction: Coronary angiography (CA) is an interventional diagnostic procedure to assess cardiovascular disease. CA is performed using dedicated fluoroscopic systems equipped with either flat detector or image intensifier. There is an increase in the number of CA annually. Reducing the radiation exposure in the CA is essential, especially due to high fluoroscopy time. In ord...

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