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Magn Reson Med. 2015 Dec;74(6):1574-86. doi: 10.1002/mrm.25546. Epub 2014 Dec 2.

Wavelet-space correlation imaging for high-speed MRI without motion monitoring or data segmentation.

Author information

1
Imaging Research Center, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.

Abstract

PURPOSE:

This study aims to (i) develop a new high-speed MRI approach by implementing correlation imaging in wavelet-space, and (ii) demonstrate the ability of wavelet-space correlation imaging to image human anatomy with involuntary or physiological motion.

METHODS:

Correlation imaging is a high-speed MRI framework in which image reconstruction relies on quantification of data correlation. The presented work integrates correlation imaging with a wavelet transform technique developed originally in the field of signal and image processing. This provides a new high-speed MRI approach to motion-free data collection without motion monitoring or data segmentation. The new approach, called "wavelet-space correlation imaging", is investigated in brain imaging with involuntary motion and chest imaging with free-breathing.

RESULTS:

Wavelet-space correlation imaging can exceed the speed limit of conventional parallel imaging methods. Using this approach with high acceleration factors (6 for brain MRI, 16 for cardiac MRI, and 8 for lung MRI), motion-free images can be generated in static brain MRI with involuntary motion and nonsegmented dynamic cardiac/lung MRI with free-breathing.

CONCLUSION:

Wavelet-space correlation imaging enables high-speed MRI in the presence of involuntary motion or physiological dynamics without motion monitoring or data segmentation.

KEYWORDS:

correlation imaging; data correlation function; high-speed MRI

PMID:
25470230
PMCID:
PMC4452472
DOI:
10.1002/mrm.25546
[Indexed for MEDLINE]
Free PMC Article

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