Zusammenfassung
Im Fokus der Weiterentwicklung in der MSCT stehen aktuell neue Anwendungen und die
Softwareentwicklung. Ein wichtiges Thema ist dabei die Multispektrenbildgebung, die
unter Verwendung von mindestens 2 verschiedenen Energiestufen eine Gewebedifferenzierung
erlaubt. Neben der Differenzierung von Kalk und Jod für die CT-Angiografie und für
onkologische Fragestellungen findet sie zunehmendes Interesse auch in anderen Anwendungsfeldern.
Durch die ultraschnelle Bildgebung werden Atem- und Pulsationsartefakte weitgehend
eliminiert, sodass eine Untersuchung auch bei mangelnder Compliance des Patienten
meist ohne Sedierung oder Narkose möglich wird. Perfusionsuntersuchungen können durch
große Detektorbreiten oder durch die sog. Shuffle-Technik auf ganze Körperregionen
ausgedehnt werden. Neue Softwareentwicklungen umfassen iterative Rekonstruktionsalgorithmen
und die organspezifische Dosismodulation für die Dosisreduktion.
Abstract
Progress in MSCT is focused on new applications and software development. A hot topic
is multispectral imaging which allows for tissue differentiation using at least two
energy-levels. Besides differentiation of calcification and jodine in CT-angiography
and oncologic imaging, there is also increasing interest in other application fields.
Ultrafast imaging nearly eliminates breathing and pulsation artifacts allowing examination
of non-compliant patients without sedation or anesthesia. Perfusion can now be extended
to large body regions using large detectors or applying shuffle-techniques. New software
developments include iterative reconstruction and organ specific dose modulation allowing
for dose reduction and for protection of radiosensitive organs.
Keywords
MSCT - multi detector row CT - new developments
Kernaussagen
-
In der MSCT liegt der Fokus der Weiterentwicklungen auf neuen Anwendungen und der
Softwareentwickung – weniger auf der weiteren Zunahme der Zeilenzahl.
-
Die Multispektrenbildgebung (Dual Energy) erlaubt die Analyse von Gewebezusammensetzungen.
-
Durch die ultraschnelle Bildgebung werden auch bei mangelnder Compliance des Patienten
Untersuchungen ohne Sedierung oder Intubation möglich.
-
Die iterativen Rekonstruktionsalgorithmen und die organspezifische Dosismodulation
haben das Potenzial, die Dosis zu reduzieren bzw. strahlensensible Organe zu schonen.
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Priv.-Doz. Dr. med. Hoen-oh Shin
Medizinische Hochschule Hannover
Institut für Radiologie
Carl-Neuberg-Straße 1
30625 Hannover
Phone: 0511 532-3421
Fax: 0511 532-3885
Email: shin.hoen-oh@mh-hannover.de
