نتایج جستجو برای: 226ra radionuclide
تعداد نتایج: 45354 فیلتر نتایج به سال:
در خاک های آهکی ایران به علت بالا بودن ph، کمبود عناصر غذایی فسفر (p) و روی (zn) شایع می باشد. ترشح اسید-های آلی با وزن مولکولی کم در ریزوسفر برخی از گونه های گیاهی، یکی از عوامل موثر در استخراج مقادیر قابل ملاحظه ای از این عناصر غذایی در خاک های آهکی می باشد. اسید های آلی علاوه بر افزایش قابلیت دسترسی عناصر غذایی، در کاهش سمیت عناصر سنگین و رادیو نوکلئید ها در خاک نیز نقش دارند. رادیوم-226 (22...
OBJECTIVE This continuing education article reviews radionuclide bone therapy agents that are available commercially and introduces agents that are being evaluated for future use. Currently these agents are used to provide pain palliation from metastases to bone. Future applications may include adjuvant therapy to surgery or external beam treatment. After reading this paper, the reader should b...
The system using X-gamma coincidence technique for the standardizing radionuclide, which present simple and complex decay scheme with X-rays of energy below 100 keV has deployed by Radionuclide Laboratory (LNMRI), Brazil. work was carried a sodium iodide detector, gamma photons, in combination high purity germanium detector X-rays. Samples 65Zn 133Ba were standardized results both radionuclides...
BACKGROUND AND PURPOSE Radiologic evaluation of CSF leaks is a diagnostic challenge that often involves multiple imaging studies with the associated expense and patient discomfort. We evaluated the use of screening noncontrast high-resolution CT in identifying the presence and site of CSF rhinorrhea and otorrhea and compared it with contrast-enhanced CT cisternography and radionuclide cisternog...
In 100 children with suspected left to right shunts the ratio of pulmonary to systemic flow was measured both by oximetry and first pass radionuclide angiography. The pulmonary time activity curve from the radionuclide study was analysed by the method of gamma variate fits. There was strong correlation between the two techniques; weaker correlation was found when the shunt was at atrial rather ...
The aim of this overview article is to present the current possibilities of radionuclide scintigraphic small intestine imaging. Nuclear medicine has a few methods-scintigraphy with red blood cells labelled by means of (99m)Tc for detection of the source of bleeding in the small intestine, Meckel's diverticulum scintigraphy for detection of the ectopic gastric mucosa, radionuclide somatostatin r...
Background: Radionuclides occur in coal combustion residues, such as fly ash and bottom ash, which are by-products of coal combustion. They pose potential radiological risks to people present in the surrounding areas. Materials and Methods: Gamma spectrometry was performed to determine the radionuclide activity concentrations in a coal-driven power plant located in the Limpopo province, South A...
Introduction Over the last 5 decades, radionuclide generators have attracted substantial attention, indeed close scrutiny of the nuclear medicine community owing to their ability to provide short-lived radioisotopes without the need for on-site nuclear reactor or cyclotron facilities for preparation of a wide variety of diagnostic and therapeutic radiopharmaceuticals [1]. The radionuclide gener...
177Lu has sprung as a promising radionuclide for targeted therapy. The low soft tissue penetration of its β- emission results in very efficient energy deposition in small-size tumours. Because of this, 177Lu is used in the treatment of neuroendocrine tumours and is also clinically approved for prostate cancer therapy. In this work, we report a separation method that achieves the challenging sep...
background: the concentrations of radionuclides like 226ra, 232th and 40k and the dose rate are measured in igneous and metamorphic rock formations in and around chickmagalur. a total of 236 samples from 13 different locations around study area were analyzed. materials and methods: the activity concentrations of the three radioactive elements were determined for mean period of 25000 s using hpg...
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