Bewegungsartefakte und Sequenzoptimierung im MRT

Wer mit dem MRT arbeitet, muss sich auch mit den Problemen dieser Untersuchungsmethode beschäftigen. Dem herausragenden Vorteil des hohen Gewebekontrasts stehen Nachteile gegenüber: Artefakte. Ziel dieses Artikels ist, die häufigen Bewegungsartefakte und die Sequenzoptimierung zu deren Reduktion zu erläutern. Neben Tipps und Tricks der Lagerung werden hier viele praxisnahe Möglichkeiten erläutert.

Abstract

Anyone who works with magnetic resonance tomographs knows their advantages as well as their disadvantages. Artifacts are part of the daily work. One of the most common artifacts is the motion artifact. Getting rid of it is very difficult and to date there is no method that 100% effective. There are many approaches, both technical and physiological. There are a lot of articles dealing with physics. A simple change in the parameters can lead to a massive change in the image. Anatomical and pathological structures can be completely lost. It is essential to know the individual parameters in the MRI and their effect on the image otherwise it is not possible to adapt and optimize an examination to the individual patient. The human factor is and remains the most common reason for this. Several methods will be discussed in this article, also the reassuring way to prepare and position the patient and communication before and during the examination. Good education can make all the difference. In addition to tips and tricks for positioning, many practical options are explained.

Schlüsselwörter

Bewegungsartefakt - Sequenzoptimierung - Kommunikation - Lagerung - MRT

Key word

Motion artifact - sequence optimization - communication - storage - magnetic resonance imaging

Publication History

Article published online:
08 September 2023

• Literatur

• 1 Petersen D. MRT-Einstelltechnik und Protokolle. Stuttgart: Thieme; 2022