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  • acquisition
  • Two slices per detector row are acquired, which results in a higher oversampling rate in the z axis, thereby reducing artifacts related to the spiral acquisition and improving spatial resolution down to 0.4 mm 3 . (ahajournals.org)
  • Spiral CT can achieve improved image resolution for a given radiation dose, compared to individual slice acquisition. (wikipedia.org)
  • Design
  • An alternative, short lived design, known as electron beam tomography (EBT), used electromagnetic deflection of an electron beam within a very large conical X-ray tube and a stationary array of detectors to achieve very high temporal resolution, for imaging of rapidly moving structures, for example the coronary arteries. (wikipedia.org)
  • alternative
  • With spiral CT, thrombus is directly visualized, and both mediastinal and parenchymal structures are evaluated, which may provide important alternative or additional diagnoses. (ahajournals.org)
  • test
  • In many institutions, spiral CT is becoming established as the first-line imaging test in daily clinical practice. (ahajournals.org)
  • cardiac
  • Real-time determination of the optimal re-construction phase to control ECG pulsing in spiral cardiac CT. (wikipedia.org)
  • This unique feature, which will be later named Multi-Slice Technology, allows to reduce the dose of radiation exposure, to obtain double spatial resolution, to substantially reduce by half the imaging time and to perform Computed tomography of the heart, cardiac imaging. (wikipedia.org)
  • clinical
  • The aim of this study was to obtain comprehensive data on clinical presentation, microbiology, computed tomography, surgical findings and histology in acute, sub-acute and chronic mastoiditis. (egms.de)
  • diagnostic
  • As a consequence of advances in diagnostic imaging, such as high-resolution or spiral computed tomography, thoracic surgeons encounter more often than in the past small-sized lung cancers at an earlier and potentially curable stage," said lead researcher Dr. Giulia Veronesi, MD, director of the Lung Cancer Early Detection Unit in the Division of Thoracic Surgery at the European Institute of Oncology in Milan, Italy. (medindia.net)
  • technique
  • In this letter, we describe a simple, reliable, and reproducible fabrication technique for a micron-sized spiral phase plate with high power efficiency (80%â€"90%) and good beam uniformity. (ebscohost.com)
  • often
  • In comic books in the latter half of the 20th century, there often appeared an advertisement for "X-ray Specs" which displayed the face of a smiling boy wearing glasses with spirals on the lenses looking at his hand through which he could see the bones. (wikipedia.org)
  • known
  • In ruminants, the ascending colon is known as the spiral colon. (wikipedia.org)
  • A CT scan, also known as computed tomography scan, makes use of computer-processed combinations of many X-ray measurements taken from different angles to produce cross-sectional (tomographic) images (virtual "slices") of specific areas of a scanned object, allowing the user to see inside the object without cutting. (wikipedia.org)
  • volume
  • Mastoid surgery was performed in 29 patients.Histology of mastoid tissue revealed predominantly acute inflammation in two cases.Radiologic data were evaluated retrospectively.Spiral, volume-based high-resolution CT of the temporal bone had a sensitivity of 100%, specificity of 38%, positive predictive value of 50% and negative predictive value of 100% in detecting coalescence of mastoid trabeculae. (egms.de)