Head motion detection using FID navigators
نویسندگان
چکیده
منابع مشابه
Head motion detection using FID navigators.
This work explores a concept for motion detection in brain MR examinations using high channel-count RF coil arrays. It applies ultrashort (<100 μsec) free induction decay signals, making use of the knowledge that motion induces variations in these signals when compared to a reference free induction decay signal. As a proof-of-concept, the method was implemented in a standard structural MRI sequ...
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Radiology & Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA Full list of author information is available at the end of the article Figure 1 Navigator signal (left) and T2-weighted TSE image (right) for reference (top), non-gated breathing (middle), and gated breathing (bottom) scans. The dashed line in the bottom left panel represents the gating threshold. Dyv...
متن کاملProspective head motion correction using FID-guided on-demand image navigators.
PURPOSE We suggest a motion correction concept that employs free-induction-decay (FID) navigator signals to continuously monitor motion and to guide the acquisition of image navigators for prospective motion correction following motion detection. METHODS Motion causes out-of-range signal changes in FID time series that, and in this approach, initiate the acquisition of an image navigator. Co-...
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Fig. 2 Uncorrected (black) and corrected (blue) navigator signal of an MP-RAGE measurement. Head position was changed during the period marked violet. The green bars show motion threshold at that moment, red points mark motion-corrupted TRs, which are rescanned at the end (pink bar). Cyan shows the online regression time course. Real-time Motion Detection for Structural Brain Imaging Using Mult...
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shaking; (b) Changes in volumetric measurements and image quality due to motion correction). The p-value is shown as calculated with the Wilcoxon rank-sum test when comparing the volumes with and without correction. 1417 Prospective motion correction with FID-triggered image navigators Maryna Babayeva, Pavel Falkovskiy, Tom Hilbert, Guillaume Bonnier, Bénédicte Maréchal, Reto Meuli, Jean-Philip...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2011
ISSN: 0740-3194
DOI: 10.1002/mrm.22797