A comparison of phase imaging and quantitative susceptibility mapping in the imaging of multiple sclerosis lesions at ultrahigh field
Objective The aim of this study was to compare the use of high-resolution phase and QSM images acquired at ultra-high field in the investigation of multiple sclerosis (MS) lesions with peripheral rings, and to discuss their usefulness for drawing inferences about underlying tissue composition....
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Published: |
Springer
2016
|
| Subjects: | |
| Online Access: | https://eprints.nottingham.ac.uk/37164/ |
| _version_ | 1848795405397000192 |
|---|---|
| author | Cronin, Matthew John Wharton, Samuel Al-Radaideh, Ali Constantinescu, Chris Evangelou, Nikos Bowtell, Richard W. Gowland, Penny A. |
| author_facet | Cronin, Matthew John Wharton, Samuel Al-Radaideh, Ali Constantinescu, Chris Evangelou, Nikos Bowtell, Richard W. Gowland, Penny A. |
| author_sort | Cronin, Matthew John |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Objective
The aim of this study was to compare the use of high-resolution phase and QSM images acquired at ultra-high field in the investigation of multiple sclerosis (MS) lesions with peripheral rings, and to discuss their usefulness for drawing inferences about underlying tissue composition.
Materials and methods
Thirty-nine Subjects were scanned at 7 T, using 3D T2*-weighted and T1-weighted sequences. Phase images were then unwrapped and filtered, and quantitative susceptibility maps were generated using a thresholded k-space division method. Lesions were compared visually and using a 1D profiling algorithm.
Results
Lesions displaying peripheral rings in the phase images were identified in 10 of the 39 subjects. Dipolar projections were apparent in the phase images outside of the extent of several of these lesions; however, QSM images showed peripheral rings without such projections. These projections appeared ring-like in a small number of phase images where no ring was observed in QSM. 1D profiles of six well-isolated example lesions showed that QSM contrast corresponds more closely to the magnitude images than phase contrast.
Conclusions
Phase images contain dipolar projections, which confounds their use in the investigation of tissue composition in MS lesions. Quantitative susceptibility maps correct these projections, providing insight into the composition of MS lesions showing peripheral rings. |
| first_indexed | 2025-11-14T19:31:34Z |
| format | Article |
| id | nottingham-37164 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:31:34Z |
| publishDate | 2016 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-371642020-05-04T17:48:21Z https://eprints.nottingham.ac.uk/37164/ A comparison of phase imaging and quantitative susceptibility mapping in the imaging of multiple sclerosis lesions at ultrahigh field Cronin, Matthew John Wharton, Samuel Al-Radaideh, Ali Constantinescu, Chris Evangelou, Nikos Bowtell, Richard W. Gowland, Penny A. Objective The aim of this study was to compare the use of high-resolution phase and QSM images acquired at ultra-high field in the investigation of multiple sclerosis (MS) lesions with peripheral rings, and to discuss their usefulness for drawing inferences about underlying tissue composition. Materials and methods Thirty-nine Subjects were scanned at 7 T, using 3D T2*-weighted and T1-weighted sequences. Phase images were then unwrapped and filtered, and quantitative susceptibility maps were generated using a thresholded k-space division method. Lesions were compared visually and using a 1D profiling algorithm. Results Lesions displaying peripheral rings in the phase images were identified in 10 of the 39 subjects. Dipolar projections were apparent in the phase images outside of the extent of several of these lesions; however, QSM images showed peripheral rings without such projections. These projections appeared ring-like in a small number of phase images where no ring was observed in QSM. 1D profiles of six well-isolated example lesions showed that QSM contrast corresponds more closely to the magnitude images than phase contrast. Conclusions Phase images contain dipolar projections, which confounds their use in the investigation of tissue composition in MS lesions. Quantitative susceptibility maps correct these projections, providing insight into the composition of MS lesions showing peripheral rings. Springer 2016-06-01 Article PeerReviewed Cronin, Matthew John, Wharton, Samuel, Al-Radaideh, Ali, Constantinescu, Chris, Evangelou, Nikos, Bowtell, Richard W. and Gowland, Penny A. (2016) A comparison of phase imaging and quantitative susceptibility mapping in the imaging of multiple sclerosis lesions at ultrahigh field. Magnetic Resonance Materials in Physics, Biology and Medicine, 29 (3). pp. 543-557. ISSN 1352-8661 Magnetic resonance imaging Multiple sclerosis White matter Iron Myelin http://link.springer.com/article/10.1007/s10334-016-0560-5 doi:10.1007/s10334-016-0560-5 doi:10.1007/s10334-016-0560-5 |
| spellingShingle | Magnetic resonance imaging Multiple sclerosis White matter Iron Myelin Cronin, Matthew John Wharton, Samuel Al-Radaideh, Ali Constantinescu, Chris Evangelou, Nikos Bowtell, Richard W. Gowland, Penny A. A comparison of phase imaging and quantitative susceptibility mapping in the imaging of multiple sclerosis lesions at ultrahigh field |
| title | A comparison of phase imaging and quantitative susceptibility mapping in the imaging of multiple sclerosis lesions at ultrahigh field |
| title_full | A comparison of phase imaging and quantitative susceptibility mapping in the imaging of multiple sclerosis lesions at ultrahigh field |
| title_fullStr | A comparison of phase imaging and quantitative susceptibility mapping in the imaging of multiple sclerosis lesions at ultrahigh field |
| title_full_unstemmed | A comparison of phase imaging and quantitative susceptibility mapping in the imaging of multiple sclerosis lesions at ultrahigh field |
| title_short | A comparison of phase imaging and quantitative susceptibility mapping in the imaging of multiple sclerosis lesions at ultrahigh field |
| title_sort | comparison of phase imaging and quantitative susceptibility mapping in the imaging of multiple sclerosis lesions at ultrahigh field |
| topic | Magnetic resonance imaging Multiple sclerosis White matter Iron Myelin |
| url | https://eprints.nottingham.ac.uk/37164/ https://eprints.nottingham.ac.uk/37164/ https://eprints.nottingham.ac.uk/37164/ |