نتایج جستجو برای: 192ir

تعداد نتایج: 176  

Journal: :Asian Pacific journal of cancer prevention : APJCP 2014
Bidhu Kalyan Mohanti Puja Sahai Alok Thakar Kapil Sikka Suman Bhasker Atul Sharma Seema Sharma Sudhir Bahadur

AIMS To describe our institutional experience with high dose rate (HDR) interstitial brachytherapy (IBT) compared with previously reported results on the low dose rate (LDR) practice for head and neck cancer. MATERIALS AND METHODS Eighty-four patients with oral cavity (n=70) or oropharyngeal cancer (n=14) were treated with 192Ir HDR-IBT. Seventy-eight patients had stage I or II tumour. The pa...

2017
Ivan M. Buzurovic Desmond A. O’Farrell Mandar S. Bhagwat Jorgen L. Hansen Thomas C. Harris Scott Friesen Robert A. Cormack Phillip M. Devlin

PURPOSE In this study, we present the treatment of the psoriatic nail beds of patients refractory to standard therapies using high-dose-rate (HDR) brachytherapy. The custom-made micro applicators (CMMA) were designed and constructed for radiation dose delivery to small curvy targets with complicated topology. The role of the HDR brachytherapy treatment was to stimulate the T cells for an increa...

Journal: :Circulation 2003
Edouard Cheneau Michael C John Jana Fournadjiev Rosanna C Chan Han-Soo Kim Laurent Leborgne Rajbabu Pakala Hamid Yazdi Andrew E Ajani Renu Virmani Ron Waksman

BACKGROUND Late total occlusion after vascular brachytherapy (VBT) continues to be a serious complication. Delayed reendothelialization was suggested as a pivotal cause, but the time course for complete healing is unknown. METHODS AND RESULTS Seventy-two rabbit iliac arteries underwent stent implantation and were treated with gamma-radiation using 192Ir. The prescribed doses were 0 Gy (contro...

Journal: :Medical physics 2010
Yun Yang Mark J Rivard

PURPOSE Both the AccuBoost D-shaped and round applicators have been dosimetrically characterized and clinically used to treat patients with breast cancer. While the round applicators provide conformal dose coverage, under certain clinical circumstances the breast skin dose may be higher than preferred. The purpose of this study was to modify the round applicators to minimize skin dose while not...

Journal: :Journal of Analytical Oncology 2022

The aim of this study was to investigate the antitumor efficacy radiodynamic therapy (RDT) with a chlorin-based photosensitizer (PS) in an vivo experiment.
 Material and Methods: performed 35 white outbred rats weighing 180±30 g. Subcutaneously transplanted Pliss lymphosarcoma (PLS) used as tumor model. Chlorin-based PS «Photolon» (RUE «Belmedpreparaty», Republic Belarus) injected intraven...

Journal: :Onkourologiâ 2021

Background . Prostate cancer (PCa) is one of the most common malignant diseases in men worldwide, with over 1.1 million cases PCa reported annually. In Russian Federation, proportion patients stage I—II from 2008 to 2018 increased 37.6 % 56 %, which turn allows more and perform radical treatment methods. However, it should be noted that number both recurrent after radiation therapy (external be...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی شاهرود - دانشکده فیزیک 1391

مقدار انرژی ذخیره شده در واحد جرم یک ماده به عوامل متفاوتی از قبیل نوع ترکیب سازنده ی آن ماده، انرژی پرتوها، نحوه پرتودهی، مدت زمان پرتودهی و ابعاد ناحیه پرتو دیده بستگی دارد. یکی از پارامترهای بسیار مهم که علاوه بر موارد بیان شده دارای اهمییت بسیار بالایی است، بدست آوردن این مقدار انرژی در ابعاد میلی، میکرو و نانو متر می باشد که کاربرد بسیار زیاد در پزشکی و محافظت در برابر پرتوها دارد. دزیمتری...

Introduction: Long-term teletherapy program is not suitable for old and working patients and those living in areas where little access to primary health care is available. Accelerated partial breast irradiation (APBI) using high dose rate (HDR) brachytherapy is an appropriate alternative for these patients due to its limited number of fractions. The AccuBoost is a system for delivering APBI. Th...

Journal: :Medical Physics 2021

Purpose Brachytherapy (BT) deals with high gradient internal dose irradiation made up of a complex system where the source is placed nearby tumor to destroy cancerous cells. A primary concern clinical safety in BT quality assurance ensure best matches between delivered and prescribed doses targeting small volume tumors sparing surrounding healthy tissues. Hence, purpose this study evaluate perf...

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