Analyse Und Eliminierung Von System- Und Messprozessbedingten Bildartefakten in Der Radialen Magnetresonanztomographie
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Home > Science, Technology & Agriculture > Technology: general issues > Engineering: general > Analyse Und Eliminierung Von System- Und Messprozessbedingten Bildartefakten in Der Radialen Magnetresonanztomographie
Analyse Und Eliminierung Von System- Und Messprozessbedingten Bildartefakten in Der Radialen Magnetresonanztomographie

Analyse Und Eliminierung Von System- Und Messprozessbedingten Bildartefakten in Der Radialen Magnetresonanztomographie


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About the Book

Inhaltsangabe: Zusammenfassung: Bei der medizinischen Kernspintomographie, auch unter dem Begriff Magnetresonanztomographie (MRT) bekannt, handelt es sich um ein computergestutztes bildgebendes Verfahren, das virtuelle Schnittbilder des menschlichen Korpers erzeugt. Die MRT als Schnittbildverfahren in der medizinischen Diagnostik zeichnet sich in erster Linie als nicht-invasive Untersuchungsmethode durch ein vielseitiges Kontrastvermogen von Weichteilgewebe aus. Es basiert auf dem Prinzip der Kernspinresonanz, bei dem der magnetische Spin der Wasserstoffkerne gezielt durch Magnetfelder beeinflusst wird. In der MRT gibt es viele verschiedene Verfahren und Methoden, um das zu messende Signal zu erhalten und daraus ein Bild zu erzeugen. Die radiale Bildgebung ist vom Prinzip ein schon bekanntes Verfahren, welches zu Beginn der Entwicklung der MRT in den 70er Jahren wegen der Ahnlichkeit zu anderen tomographischen Verfahren bevorzugt eingesetzt wurde, aber dann von den kartesischen Verfahren verdrangt wurde. Heutzutage findet man die radialen Verfahren wieder in neueren MRT-Geraten, besonders wegen der hohen Orts- und Zeitauflosung, der Robustheit gegenuber Bewegungsartefakten und der guten Darstellung von Gewebe mit sehr kurzer T2-Zeit. Dies macht die radiale Bildgebung interessant fur spezielle Untersuchungen und Anwendungen, wie zum Beispiel in der Herzdiagnostik. Da die Hard- und Software der jetzigen klinischen MRT-Gerate primar fur kartesische Bildgebung optimiert sind, enthalten die radial aufgenommen Bilder momentan noch Bildartefakte, die durch unvollstandige Steuerung des Messprozesses entstehen. Diese Ungenauigkeiten sind auch bei den kartesischen Messungen prasent, erzeugen aber dort keine Artefakte, da ihre Auswirkung bei kartesischer Bildgebung vernachlassigbar ist. Um die radiale Bildgebung auf klinischen MRT-Geraten konkurrenzfahig zu machen ist es notig, ihre Bildqualitat weiter zu verbessern und die vorhandenen Bildartefakte zu eliminieren. Die vorlieg"


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Product Details
  • ISBN-13: 9783836650984
  • Publisher: Diplom.de
  • Publisher Imprint: Diplom.de
  • Height: 210 mm
  • No of Pages: 110
  • Spine Width: 7 mm
  • Width: 148 mm
  • ISBN-10: 3836650983
  • Publisher Date: 16 Jan 2007
  • Binding: Paperback
  • Language: German
  • Returnable: N
  • Weight: 154 gr


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Analyse Und Eliminierung Von System- Und Messprozessbedingten Bildartefakten in Der Radialen Magnetresonanztomographie
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