Loading...
Please wait, while we are loading the content...
Similar Documents
Volumetric navigators for prospective motion correction and selective reacquisition in neuroanatomical MRI
| Content Provider | Scilit |
|---|---|
| Author | Tisdall, M. Dylan Hess, Aaron T. Reuter, Martin Meintjes, Ernesta M. Fischl, Bruce van der Kouwe, André J. W. |
| Copyright Year | 2011 |
| Description | Journal: Magnetic Resonance in Medicine We introduce a novel method of prospectively compensating for subject motion in neuroanatomical imaging. Short three-dimensional echo-planar imaging volumetric navigators are embedded in a long three-dimensional sequence, and the resulting image volumes are registered to provide an estimate of the subject's location in the scanner at a cost of less than 500 ms, ~ 1% change in contrast, and ~3% change in intensity. This time fits well into the existing gaps in sequences routinely used for neuroimaging, thus giving a motion-corrected sequence with no extra time required. We also demonstrate motion-driven selective reacquisition of k-space to further compensate for subject motion. We perform multiple validation experiments to evaluate accuracy, navigator impact on tissue intensity/contrast, and the improvement in final output. The complete system operates without adding additional hardware to the scanner and requires no external calibration, making it suitable for high-throughput environments. |
| Related Links | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3320676/pdf |
| Ending Page | 399 |
| Page Count | 11 |
| Starting Page | 389 |
| e-ISSN | 15222594 |
| DOI | 10.1002/mrm.23228 |
| Journal | Magnetic Resonance in Medicine |
| Issue Number | 2 |
| Volume Number | 68 |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2011-12-28 |
| Access Restriction | Open |
| Subject Keyword | Journal: Magnetic Resonance in Medicine Radiology, Nuclear Medicine and Imaging Prospective Motion Correction Brain Morphometry |
| Content Type | Text |
| Resource Type | Article |
