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Книга ISBN13 9783846503485 - Partial-Data Interpolation During Arcing of an X-Ray Tube in CT (Jaisingh Rajwade) в магазинах, библиотеках и электронных библиотеках с он-лайн чтением

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Название: Partial-Data Interpolation During Arcing of an X-Ray Tube in CT
X-ray tubes are used in computed tomography (CT) scanners as the energy source for generation of images. These tubes occasionally tend to arc, an undesired phenomenon where high current surges through the tube. During the time that the x-ray tube recovers to full voltage after an arc, image data is being collected. Normally this data, acquired at less than full voltage, is discarded and interpolation is performed over the arc duration. However, this is not ideal and some residual imperfections in images, called artifacts, still remain. Proposed here is an algorithm that corrects for improper tube voltage, allowing previously discarded data to be used for imaging. Instead of throwing away all data during the arc period, we use some of the data that is available as the voltage is rising back to its programmed value. This method reduces the length of the interpolation period, thus reducing artifacts. Results of implementation on a CT scanner show that there is an improvement in image...
Авторы: Jaisingh Rajwade
Издательство: LAP Lambert Academic Publishing
Год: 2011
Местонахождение: OZON.ru
ISBN: 9783846503485


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