نتایج جستجو برای: external radiation

تعداد نتایج: 420496  

Objective(s): The aim of this study was to determine whether high-dose radioactive iodine (Na131I) outpatient treatment of patients with thyroid carcinoma is a pragmatically safe approach, particularly for the safety of caregivers. Methods: A total of 79 patients completed the radiation-safety questionnaires prior to receiving high-dose radioactive iodine treatment. The questionnaire studied th...

ژورنال: سنجش و ایمنی پرتو 2020

Radiation damage depends on energy absorption, and is approximately proportional to the absorbed energy density in the tissue. In external radiation consideration with a certain energy flux, the amount of absorbed dose in each point of the tissue depends on the type of radiation, the radiation energy, the depth of the place of receipt, and the main components of the absorber environment. The ab...

Journal: :asia oceania journal of nuclear medicine and biology 0
mohammad eftekhari research center for nuclear medicine, tehran university of medical sciences, tehran, iran robabeh anbiaei anbiaei department of radiation oncology, imam hossein hospital, shahid beheshti university of medical sciences, tehran, iran hanie zamani research center for nuclear medicine, tehran university of medical sciences, tehran, iran babak fallahi research center for nuclear medicine, tehran university of medical sciences, tehran, iran davood beiki research center for nuclear medicine, tehran university of medical sciences, tehran, iran ahmad ameri department of radiation oncology, imam hossein hospital, shahid beheshti university of medical sciences, tehran, iran

objective(s): radiation therapy for breast cancer can induce myocardial capillary injury and increase cardiovascular morbidity and mortality. a prospective cohort was conducted to study the prevalence of myocardial perfusion abnormalities following radiation therapy of left-sided breast cancer patients as compared to those with right–sided cancer. methods: to minimize potential confounding fact...

2005
Shizuo Nakane

In this note, the dynamics of a regular polynomial map of C 2 is investigated. Especially, landing points of the external rays are completely characterized.

2003
Markus Förster Dierk Schleicher

We investigate the set of parameters κ ∈ C for which the singular orbit (0, eκ, . . .) of Eκ(z) := exp(z + κ) converges to ∞. These parameters are organized in smooth curves in parameter space called parameter rays.

Journal: :Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology 2003
Alfons C M van den Bergh Robin P F Dullaart Marjanke A Hoving Thera P Links Cees A ter Weeme Ben G Szabó Jan Willem R Pott

For diagnosing radiation optic neuropathy (RON) ophthalmological and imaging data were evaluated from 63 acromegalic patients, irradiated between 1967 and 1998. Two patients developed RON: one patient in one optic nerve 10 years and another patient in both optic nerves 5 months after radiation therapy. RON is a rare complication after external beam radiation therapy for acromegaly, which can oc...

Journal: :iranian journal of radiation research 0
m.b. tavakoli department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran g.h fallah mohammadi department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran z. fallah mohammadi department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran z. shaneh department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran

background: high level radiation areas have been recognized on various parts of the earth. mahallat hot spring region is one of these areas. study of exposure in these areas can be helpful in investigating the effects of ionizing radiation. internal and external exposure to the staff was studied. materials and methods: used materials and instruments include: rss-112 ionizing chamber for environ...

ژورنال: سنجش و ایمنی پرتو 2014

All building materials contain various amounts of natural radioactive nuclides. Materials derived from rock and soil contain mainly natural radionuclides of the uranium (238U) and thorium (232Th) series, and the radioactive isotope of potassium (40K). Radiation exposure due to building materials can be divided into external and internal exposure. The external exposure is caused by direct gamma ...

Azadeh Soleimani Elyas Sanaei Marjaneh Mir-Sadraee Mohammad Mohammadi, Mohammad Taghi Batiar,

Introduction: Rectal and bladder cancer are the most common disease among young man. Although External Radiotherapy (EBRT) is one of the most effective treatment options introduced so far, the testis undesired radiation dose increases the risk of infertility and hormonal malfunctioning. The testicles are usually outside of the radiation field, but they can be exposed either to ...

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