منابع مشابه
Epileptogenic effects of radiographic contrast agents: experimental study.
Electrical activity in cells directly exposed to water-soluble radiographic contrast agents was investigated by intracellular recordings from neurons of the abdominal ganglia of Aplysia. Measurements of membrane resting potential, membrane conductance, synaptic and action potential configuration, and spontaneous electrical activity were performed. Test solutions included sodium diatrizoate, meg...
متن کاملContrast Agents
MRI has become a very important tool for clinical diagnosis of disease as well as in biomedical studies for the noninvasive three-dimensional imaging of living subjects and specimens. It can distinguish between various parts of soft tissue water based on differences in the longitudinal relaxation time (T1), the transverse relaxation time (T2), the apparent transverse relaxation time (T2*) and t...
متن کاملRadiographic and magnetic resonances contrast agents: Essentials and tips for safe practices
With extended and continued expansion of medical imaging utilization in modern medical practice over last decade, radiologists as well as other faculty staff dealing with radiographic and magnetic resonances contrast media (CM) have to be well oriented with their potential hypersensitivity reactions and recognize high-risk groups liable to develop it and enable early recognition. Radiologists a...
متن کاملImpact of contrast agents on dose algorıthms of planning systems
Background: Use of contrast agents (CAs) during CT simulation for treatment planing system leads to changes in electron density. In this study we aimed to investigate the effect on calculated dose of various concentrations of CAs on treatment planing systems in different dose calculation algorithms. Materials and Methods: Contrast agent (0.769 mg/ml Iopromid) - water mixtures at con...
متن کاملDevelopment of Radiographic Contrast-Enhancement Masks
Radiographic contrast-enhancement mask (RCM) algorithms were developed to overcome some limitations of general digital radiography (DR). Large attenuation differences of some anatomical regions result in exit radiation having a wide dynamic range. In general radiography, this results in anatomy not being fully visualised in the image or being displayed with suboptimal contrast. Physical tissue ...
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ژورنال
عنوان ژورنال: Gastroenterology
سال: 1978
ISSN: 0016-5085
DOI: 10.1016/0016-5085(78)90892-2