نتایج جستجو برای: radiation dosage
تعداد نتایج: 339057 فیلتر نتایج به سال:
As commonly used, most radioactive isotopes are ingested or injected in soluble form and subsequently deposited with a greater or lesser degree of selectivity in various cells and organs. In the event of a single administration, the number of radioactive atoms present at any particular site will increase at first (as they are drawn from the circulation along with their stable isotopes), it will...
The objective of this study is to prepare a super absorbent hydrogel based on polyacrylic acid and an environmentally friendly material such as shellac remove malachite green dye from aqueous solution using gamma radiation. adsorption (MG) dyes (PAA)/shellac (SH) hydrogels was studied. These were prepared by mixing solutions PAA SH at differing molecular ratios (10%, 20%, 30% content in the fin...
conclusions evaluation of iranian traditional dosage forms like vaginal and rectal types could be an attractive topic of research and the current study can briefly represent the iranian traditional pharmaceutical knowledge on vaginal and rectal drug delivery. objectives the aim of this study is the investigation about iranian traditional pharmaceutical dosage forms of vaginal and rectal medicat...
In revising cancer risk assessment guidelines, the U.S. Environmental Protection Agency (EPA) analyzed animal cancer bioassay data over different periods of life. In this article, we report an improved analysis of these data (supplemented with some chemical carcinogenesis observations not included in the U.S. EPA's original analysis) and animal bioassay studies of ionizing radiation. We use lik...
The Nonnegative Least Squares (NNLS) formulation arises in many important regression problems. We present a novel coordinate descent method which differs from previous approaches in that we do not explicitly maintain complete gradient information. Empirical evidence shows that our approach outperforms a state-of-the-art NNLS solver in computation time for calculating radiation dosage for cancer...
Localization of the placenta by means of technetium-99m and a portable scintillation counter and ratemeter proved to be both simple and accurate. It could be performed by resident obstetric staff with minimal technical knowledge, and the radiation dosage was low.
The following tissue damage has been described after whole body X-radiation: destruction of the intestinal mucosal lining with ulceration and hemorrhage, destruction of lymphoid tissue and of bone marrow, severe leucopenia and thrombocytopenia, and damage to capillary endothelium (1, 2). The observations on germfree animals by Gordon and Scruggs at the Lobound Institute have shown that if the r...
BACKGROUND Accurate assessment of intra- as well as extra-cardiac malformations and radiation dosage concerns are especially crucial to infants and children with interrupted aortic arch (IAA). The purpose of this study is to investigate the value of prospective electrocardiogram (ECG)-triggered dual-source computed tomography (DSCT) angiography with low-dosage techniques in the diagnosis of IAA...
The possibility of using long film-focus distance radiography as a new screening method for lung cancer diagnosis was investigated. Long-film focus distance radiography produced exceptionally superior image sharpness suitable for use as clinical photographs, at a distance of about FFD (Film-Focus Distance) 20 m. The effective energy was increased by narrowing the radiation spectrum via an air-f...
Overview Chemotherapy-induced (or radiotherapy-induced) vomiting (emesis) and nausea can significantly affect a patient’s quality of life, leading to poor compliance with further chemotherapy or radiation therapy treatment. Nausea and vomiting can also result in metabolic imbalances, degeneration of self-care and functional ability, nutrient depletion, anorexia, decline of performance status an...
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