MR techniques promise improved lung imaging.Two new noninvasive magnetic resonance magnetic resonance, in physics and chemistry, phenomenon produced by simultaneously applying a steady magnetic field and electromagnetic radiation (usually radio waves) to a sample of atoms and then adjusting the frequency of the radiation and the strength of the techniques that image the lungs in motion could provide early detection of diseases such as emphysema emphysema (ĕmfĭsē`mə), pathological or physiological enlargement or overdistention of the air sacs of the lungs. A major cause of pulmonary insufficiency in chronic cigarette smokers, emphysema is a progressive disease that commonly before they become evident on other modes of imaging. Watching lungs function in real time has been limited by the low resolution of conventional imaging methods, according to researchers at the University of Pennsylvania School of Medicine The University of Pennsylvania's School of Medicine, presently located in the University City section of Philadelphia, Pennsylvania, was the United States's first school of medicine, founded at the College of Philadelphia, as the University was then called. in Philadelphia. The researchers developed a method of using hyperpolarized helium gas to observe the lung as gas flows in and out, providing them high-resolution images of human ventilation. In this technique, patients inhale helium gas that has been exposed to a laser light to make all of the atoms spin in the same direction, creating the polarized A one-way direction of a signal or the molecules within a material pointing in one direction. helium. This polarization allows the atoms to have a strong signal for sharper images on MR. By combining several techniques, the researchers can measure the rate of diffusion of these helium gas molecules, which reflect the size of the air sacs air sacs sacs that communicate with the respiratory, air-filled membranous system in birds and primates. avian air sacs there are eight air sacs in the chicken: an unpaired cervical, an unpaired clavicular, a pair of cranial in the lung. This, in turn, allows for detection of very early emphysema, even before it is evident on computed tomography. The information could help physicians provide diagnoses and offer treatment. University of Pennsylvania (body, education) University of Pennsylvania - The home of ENIAC and Machiavelli. http://upenn.edu/. Address: Philadelphia, PA, USA. researchers are working on another MR technique that one day could enable them to image the human lung at the cellular and intracellular level. The technique relies on the injection of polarized carbon 13, which breaks down and releases energy once in the body. What this flagged molecule converts into could tell researchers whether the cell is normal or abnormal, and help pinpoint the location of disease. The University of Pennsylvania researchers have been studying the technique in animal models and hope to translate it for use in humans before the end of 2007. |
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