2015
DOI: 10.1002/mrm.25830
|View full text |Cite
|
Sign up to set email alerts
|

Reverse retrospective motion correction

Abstract: Purpose One potential barrier for using Prospective Motion Correction (PMC) in the clinic is the unpredictable nature of a scan because of the direct interference with the imaging sequence. We demonstrate that a second set of “de-corrected” images can be reconstructed from a scan with PMC that show how images would have appeared without PMC enabled. Theory and Methods For 3D scans, the effects of PMC can be undone by performing a retrospective reconstruction based on the inverse of the transformation matrix … Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

0
20
0

Year Published

2016
2016
2024
2024

Publication Types

Select...
7
2

Relationship

0
9

Authors

Journals

citations
Cited by 18 publications
(20 citation statements)
references
References 26 publications
0
20
0
Order By: Relevance
“…Also, compressed sensing (53,54); Controlled Aliasing in Parallel Imaging Results in Higher Acceleration (32); or multiband, multislice imaging (55) could further decrease the scan duration. Potential residual motion artifacts due to large motion (gradient and static magnetic field inhomogeneity, relative changes in coil sensitivity profiles) or imperfect motion correction (crosscalibration errors, latency, pseudo motion) could be addressed retrospectively (35,(56)(57)(58)(59). In less experienced cohorts, large motion could increase residual artifacts due to, for example, relative changes in the receiver sensitivity profiles or gradient nonlinearities, which cannot be corrected by PMC.…”
Section: Discussionmentioning
confidence: 99%
“…Also, compressed sensing (53,54); Controlled Aliasing in Parallel Imaging Results in Higher Acceleration (32); or multiband, multislice imaging (55) could further decrease the scan duration. Potential residual motion artifacts due to large motion (gradient and static magnetic field inhomogeneity, relative changes in coil sensitivity profiles) or imperfect motion correction (crosscalibration errors, latency, pseudo motion) could be addressed retrospectively (35,(56)(57)(58)(59). In less experienced cohorts, large motion could increase residual artifacts due to, for example, relative changes in the receiver sensitivity profiles or gradient nonlinearities, which cannot be corrected by PMC.…”
Section: Discussionmentioning
confidence: 99%
“…One of the more irksome practical problems is that no “uncorrected” images can be extracted from an experiment if data were acquired with prospective correction. Although an approximation of undoing the effects of prospective correction has been recently proposed (Zahneisen et al, 2016) it can only be used for demonstration purposes and is not relevant to typical fMRI protocols. Therefore, a major constraint exists in performing validation studies, as separate runs are required for scans with and without prospective motion correction, whereas the conditions involving involuntarily motions are not reproducible by definition.…”
Section: Common Pitfalls Associated With Prospective Motion Correctionmentioning
confidence: 99%
“…Reverting to uncorrected data is not possible. However, the corrected data may be ‘de-corrected’ by reverse retrospective reconstruction (Zahneisen et al 2015). Higher order effects such as changing B 0 inhomogeneities and gradient imperfections cannot be corrected by PMC.…”
Section: Prospective Motion Correctionmentioning
confidence: 99%