نتایج جستجو برای: heart dose

تعداد نتایج: 683169  

Journal: :Asian Pacific journal of cancer care 2022

Purpose: To compare the dose distribution of three-dimensional conformal radiation therapy (3DCRT) with intensity-modulated (IMRT) for post-mastectomy radiotherapy (PMRT) to left chest wall. Materials and Methods: 30 post-MRM female breast cancer patients histologically confirmed infiltrating ductal carcinoma unilateral without evidence distant metastasis or second malignancy were found eligibl...

Journal: :International journal of radiation oncology, biology, physics 2010
Giovanna Gagliardi Louis S Constine Vitali Moiseenko Candace Correa Lori J Pierce Aaron M Allen Lawrence B Marks

The literature is reviewed to identify the main clinical and dose-volume predictors for acute and late radiation-induced heart disease. A clear quantitative dose and/or volume dependence for most cardiac toxicity has not yet been shown, primarily because of the scarcity of the data. Several clinical factors, such as age, comorbidities and doxorubicin use, appear to increase the risk of injury. ...

Journal: :Postgraduate medical journal 1995
J G Cleland W N Hubbard J Pittard P A Poole-Wilson G C Sutton

Editorial Ace inhibitors in heart failure. What dose? The role of ACE (angiotensin converting enzyme) inhibitors in the treatment of heart failure is now well established. A large body of published work has demonstrated relief of symptoms, increased exercise performance, a reduction in hospital admissions and superiority to conventional vasodilators. Three large survival studies (CONSENSUS-1,' ...

2016
Edward A Gardner Georg A. Weidlich

In a treatment planning study, radiosurgical treatment plans designed to produce lesions on the left atrium were created using two different methodologies. In one, structures in the heart (mitral valve and coronary arteries) were designated as critical structures while this was not done in the second plan. The treatment plans that were created were compared with standards for heart dose used wh...

Journal: :International Journal of Radiation Oncology*Biology*Physics 2013

زاهد حسین خان, , علی‌رضا ماهوری, , محمد تقی بیک محمدی, ,

Background: Remifentanil is known to produce side-effects of hypotension and bradycardia. In this study, we examine the effect of low-dose ketamine infusion on the heart rate and blood pressure of patients anesthetized with remifentanil.Methods: In a randomized clinical trial, 54 patients aged 20-50 years old, with ASA physical status Ι, were studied in two groups (n=27), Ketamine- Remifentanil...

Journal: :iranian journal of medical physics 0
somayeh nourollahi m.sc.in medical physics, faculty of medicine, tehran university of medical sciences, tehran, iran mahmoud allahverdi associate professor, medical physics dept., faculty of medicine, tehran university of medical sciences, tehran, iran mahbod esfahani m.sc.in medical physics, radiotherapy dept., cancer institute, tehran university of medical sciences, tehran, iran mehdi aghili assistant professor, radiotherapy dept., cancer institute, tehran university of medical sciences, tehran, iran vahid changizi assistant professor, radiology technology dept., faculty of allied medical sciences, tehran university of medical sciences, tehran, iran

introduction: the complex geometry of breast and also lung and heart inhomogeneities near the planning target volume (ptv) result in perturbations in dose distribution. this problem can result in overdosage or underdosage in the match region of the three treatment fields. the purpose of this study is to create a homogeneous dose distribution in the match region between the supraclavicular and t...

Journal: :the iranian journal of pharmaceutical research 0
mansour esmailidehaj department of physiology, faculty of medicine, shahid sadoughi university of medical sciences, yazd, iran. seyed jalil mirhosseini cardiovascular research center, afshar hospital, shahid sadoughi university of medical sciences, yazd, iran. mohammad ebrahim rezvani department of physiology, faculty of medicine, shahid sadoughi university of medical sciences, yazd, iran. bahram rasulian razi herbal medicines research center, lorestan university of medical sciences, khorramabad, iran. mohammad hossein mosaddeghmehrjardi department of pharmacology, faculty of medicine, shahid sadoughi university of medical sciences, yazd, iran. damoon haghshenas cardiovascular research center, afshar hospital, shahid sadoughi university of medical sciences, yazd, iran.

in this study, it was surveyed to know whether an oral single dose of oleuropein could mimic the cardiac preconditioning in rats’ hearts or whether its prolonged oral administration could protect the heart against the aconitine-induced arrhythmia in rats. eighty male wistar rats were divided into two series (n = 8 in each group). in the first series, all groups (except the control (con) group) ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1392

پایان نامه حاضر در مورد امکان سنجی استفاده از مدلسازی آماری مبـتنی برbmd جهت برآورد حجم بحرانی خونریزی درایجاد مقادیر معینی از خطر مرگ ناشی از خونــریزی مــغزی غیرتروماتیک(خود به خودی) می باشد. روشbmd در رابطه با مقدار دوز یا حجم بحرانی یک وضعیت از پیش تعیین شده برای بدست آوردن بهترین پاسخ جهت ارزیابی خطرات سلامتی و بهداشتی و همچنین برآورد مقدار یا حجم بحرانی دوز می باشد. روشbmd یک روش جایگزین...

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...

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