Dataset Information

Cross correlation-based misregistration correction for super resolution T₂ -weighted spin-echo images: application to prostate.

ABSTRACT:

Purpose

The purpose is to develop a retrospective correction for subtle slice-to-slice positional inconsistencies that can occur when overlapped slices are acquired for super resolution in T₂ -weighted spin-echo multislice imaging.

Methods

Spin-echo acquisition of overlapped slices is typically done using multiple passes. After the passes are assembled into the final slice set, consecutive slices are correlated due to their overlap. Cross correlation was used to measure slice-to-slice displacement. After Z-dependent filtering to preserve true object shape, the displacements were used to correct slice position. The method was tested in a phantom moved slowly (0.16-0.63 mm/pass) under computer control and in vivo in 16 patients having prostate MRI.

Results

Over the motion range, the correlation method had an accuracy within 0.03 mm/pass and precision ± 0.20 mm (ie, subpixel). Corrected images visually resemble the true object. Over the patient studies, the mean range of motion in the anterior-posterior direction was 1.63 mm. Motion-corrected axial images and the sagittal reformats were evaluated as significantly superior over those formed without motion correction.

Conclusion

The retrospective correlation-based motion-correction method provides significant improvement in the slice-to-slice registration necessary for effective super resolution using overlapped slices.

SUBMITTER: Borisch EA

PROVIDER: S-EPMC7718320 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature

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Publications

Cross correlation-based misregistration correction for super resolution T<sub>2</sub> -weighted spin-echo images: application to prostate.

Borisch Eric A EA Grimm Roger C RC Kargar Soudabeh S Kawashima Akira A Rossman Phillip J PJ Riederer Stephen J SJ

Magnetic resonance in medicine 20200924 3

<h4>Purpose</h4>The purpose is to develop a retrospective correction for subtle slice-to-slice positional inconsistencies that can occur when overlapped slices are acquired for super resolution in T<sub>2</sub> -weighted spin-echo multislice imaging.<h4>Methods</h4>Spin-echo acquisition of overlapped slices is typically done using multiple passes. After the passes are assembled into the final slice set, consecutive slices are correlated due to their overlap. Cross correlation was used to measure ...[more]

PMID: 32970892

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Dataset Information

Cross correlation-based misregistration correction for super resolution T₂ -weighted spin-echo images: application to prostate.

Purpose

Methods

Results

Conclusion

Publications

Cross correlation-based misregistration correction for super resolution T<sub>2</sub> -weighted spin-echo images: application to prostate.

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OmicsDI is part of the ELIXIR infrastructure

Tweets

Dataset Information

Cross correlation-based misregistration correction for super resolution T2 -weighted spin-echo images: application to prostate.

Purpose

Methods

Results

Conclusion

Publications

Cross correlation-based misregistration correction for super resolution T<sub>2</sub> -weighted spin-echo images: application to prostate.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Cross correlation-based misregistration correction for super resolution T₂ -weighted spin-echo images: application to prostate.