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SHR Neuro Cancer Cardio Lipid Metab Microb

Oechsner, M; Pracht, ED; Staeb, D; Arnold, JFT; Kistler, H; Hahn, D; Beer, M; Jakob, PM.
Lung Imaging Under Free-Breathing Conditions
Magn Reson Med. 2009; 61(3):723-727 Doi: 10.1002/mrm.21846
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Co-authors Med Uni Graz: Beer Meinrad
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Abstract:: Respiratory motion and pulsatile blood flow can generate artifacts in morphological and functional lung imaging. Total acquisition time, and thus the achievable signal to noise ratio, is limited when performing breath-hold and/or electrocardiogram-triggered imaging. To overcome these limitations, imaging during free respiration can be performed using respiratory gating/triggering devices or navigator echoes. However, these techniques provide only poor gating resolution and can induce saturation bands and signal fluctuations into the lung volume. In this work, acquisition schemes for nonphase encoded navigator echoes were implemented into different sequences for morphological and functional lung imaging at 1.5 Tesla (T) and 0.2T. The navigator echoes allow monitoring of respiratory motion and provide an ECG-trigger signal for correction of the heart cycle without influencing the imaged slices. Artifact free images acquired during free respiration using a 3D GE, 2D multislice TSE or multi-Gradient Echo sequence for oxygen-enhanced T(2)(*) quantification are presented.
Find related publications in this database (using NLM MeSH Indexing): Algorithms -; Artifacts -; Humans -; Image Enhancement - methods; Image Interpretation, Computer-Assisted - methods; Imaging, Three-Dimensional - methods; Lung - anatomy and histology; Magnetic Resonance Imaging - methods; Motion -; Pattern Recognition, Automated - methods; Reproducibility of Results -; Respiratory Mechanics -; Respiratory-Gated Imaging Techniques - methods; Sensitivity and Specificity -
Find related publications in this database (Keywords): free-breathing; lung imaging; respiration triggering; navigator echo