Feasibility of postoperative 3-tesla diffusion tensor imaging in cervical spondylotic myelopathy: A comparison of single-shot EPI and multi-shot EPI

Euddeum Shim, Eugene Lee, Joon Woo Lee, Yusuhn Kang, Joong Mo Ahn, Heung Sik Kang

Research output: Contribution to journalArticle

Abstract

Purpose: To explore the feasibility of postoperative high-tesla DTI in CSM and optimize its acquisition parameters using both single-shot (SS) echo-planar imaging (EPI) and multi-shot (MS) EPI, and to evaluate correlation between image degradation and operative methods. Method: We enrolled twenty-seven patients with CSM scheduled for MRI at one month after cervical operations who were divided into three groups; 11 patients in group 1; 11 in group 2; and 5 in group 3. The patient in each group underwent two sets of DTI using both SS-EPI and MS-EPI with different diffusion gradient directions. Qualitative and quantitative analysis of fractional anisotropy (FA) and color-coding maps were performed to evaluate image distortion and spinal cord visualization and were compared between SS- and MS-EPI. DTI indices, including the number of reconstructed fibers, mean apparent diffusion coefficient (ADC) values, and mean FA values, were acquired. Results: In the metallic segment, MS-EPI with 6 diffusion gradients showed significantly less distortion and better cord visualization than SS-EPI. Fiber tracking was also superior with MS-EPI sequences. Scores in the subjective motor improvement scale showed a moderately positive correlation correlated only with the mean ADC at 1 month postoperatively. Regarding the operation methods, DTI in patients who underwent anterior cervical discectomy and fusion showed the least image distortion and 100 % success rate of fiber tractography. Conclusions: Compared with SS-EPI, MS-EPI with motion correction significantly improves image distortions and increases the success rate of fiber tractography in CSM patients with metal implants.

Original languageEnglish
Article number108751
JournalEuropean Journal of Radiology
Volume122
DOIs
StatePublished - Jan 2020

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Echo-Planar Imaging
Diffusion Tensor Imaging
Spinal Cord Diseases
Anisotropy
Diskectomy
Spinal Cord
Color
Metals

Keywords

  • 3-T diffusion tensor imaging
  • Cervical spondylotic myelopathy
  • Multi-shot echo-planar imaging
  • Postoperative
  • Single-shot echo-planar imaging

Cite this

@article{3a8a8851cac14a6f936260847fb77308,
title = "Feasibility of postoperative 3-tesla diffusion tensor imaging in cervical spondylotic myelopathy: A comparison of single-shot EPI and multi-shot EPI",
abstract = "Purpose: To explore the feasibility of postoperative high-tesla DTI in CSM and optimize its acquisition parameters using both single-shot (SS) echo-planar imaging (EPI) and multi-shot (MS) EPI, and to evaluate correlation between image degradation and operative methods. Method: We enrolled twenty-seven patients with CSM scheduled for MRI at one month after cervical operations who were divided into three groups; 11 patients in group 1; 11 in group 2; and 5 in group 3. The patient in each group underwent two sets of DTI using both SS-EPI and MS-EPI with different diffusion gradient directions. Qualitative and quantitative analysis of fractional anisotropy (FA) and color-coding maps were performed to evaluate image distortion and spinal cord visualization and were compared between SS- and MS-EPI. DTI indices, including the number of reconstructed fibers, mean apparent diffusion coefficient (ADC) values, and mean FA values, were acquired. Results: In the metallic segment, MS-EPI with 6 diffusion gradients showed significantly less distortion and better cord visualization than SS-EPI. Fiber tracking was also superior with MS-EPI sequences. Scores in the subjective motor improvement scale showed a moderately positive correlation correlated only with the mean ADC at 1 month postoperatively. Regarding the operation methods, DTI in patients who underwent anterior cervical discectomy and fusion showed the least image distortion and 100 {\%} success rate of fiber tractography. Conclusions: Compared with SS-EPI, MS-EPI with motion correction significantly improves image distortions and increases the success rate of fiber tractography in CSM patients with metal implants.",
keywords = "3-T diffusion tensor imaging, Cervical spondylotic myelopathy, Multi-shot echo-planar imaging, Postoperative, Single-shot echo-planar imaging",
author = "Euddeum Shim and Eugene Lee and Lee, {Joon Woo} and Yusuhn Kang and Ahn, {Joong Mo} and Kang, {Heung Sik}",
year = "2020",
month = "1",
doi = "10.1016/j.ejrad.2019.108751",
language = "English",
volume = "122",
journal = "European Journal of Radiology",
issn = "0720-048X",
publisher = "Elsevier Ireland Ltd",

}

TY - JOUR

T1 - Feasibility of postoperative 3-tesla diffusion tensor imaging in cervical spondylotic myelopathy

T2 - A comparison of single-shot EPI and multi-shot EPI

AU - Shim, Euddeum

AU - Lee, Eugene

AU - Lee, Joon Woo

AU - Kang, Yusuhn

AU - Ahn, Joong Mo

AU - Kang, Heung Sik

PY - 2020/1

Y1 - 2020/1

N2 - Purpose: To explore the feasibility of postoperative high-tesla DTI in CSM and optimize its acquisition parameters using both single-shot (SS) echo-planar imaging (EPI) and multi-shot (MS) EPI, and to evaluate correlation between image degradation and operative methods. Method: We enrolled twenty-seven patients with CSM scheduled for MRI at one month after cervical operations who were divided into three groups; 11 patients in group 1; 11 in group 2; and 5 in group 3. The patient in each group underwent two sets of DTI using both SS-EPI and MS-EPI with different diffusion gradient directions. Qualitative and quantitative analysis of fractional anisotropy (FA) and color-coding maps were performed to evaluate image distortion and spinal cord visualization and were compared between SS- and MS-EPI. DTI indices, including the number of reconstructed fibers, mean apparent diffusion coefficient (ADC) values, and mean FA values, were acquired. Results: In the metallic segment, MS-EPI with 6 diffusion gradients showed significantly less distortion and better cord visualization than SS-EPI. Fiber tracking was also superior with MS-EPI sequences. Scores in the subjective motor improvement scale showed a moderately positive correlation correlated only with the mean ADC at 1 month postoperatively. Regarding the operation methods, DTI in patients who underwent anterior cervical discectomy and fusion showed the least image distortion and 100 % success rate of fiber tractography. Conclusions: Compared with SS-EPI, MS-EPI with motion correction significantly improves image distortions and increases the success rate of fiber tractography in CSM patients with metal implants.

AB - Purpose: To explore the feasibility of postoperative high-tesla DTI in CSM and optimize its acquisition parameters using both single-shot (SS) echo-planar imaging (EPI) and multi-shot (MS) EPI, and to evaluate correlation between image degradation and operative methods. Method: We enrolled twenty-seven patients with CSM scheduled for MRI at one month after cervical operations who were divided into three groups; 11 patients in group 1; 11 in group 2; and 5 in group 3. The patient in each group underwent two sets of DTI using both SS-EPI and MS-EPI with different diffusion gradient directions. Qualitative and quantitative analysis of fractional anisotropy (FA) and color-coding maps were performed to evaluate image distortion and spinal cord visualization and were compared between SS- and MS-EPI. DTI indices, including the number of reconstructed fibers, mean apparent diffusion coefficient (ADC) values, and mean FA values, were acquired. Results: In the metallic segment, MS-EPI with 6 diffusion gradients showed significantly less distortion and better cord visualization than SS-EPI. Fiber tracking was also superior with MS-EPI sequences. Scores in the subjective motor improvement scale showed a moderately positive correlation correlated only with the mean ADC at 1 month postoperatively. Regarding the operation methods, DTI in patients who underwent anterior cervical discectomy and fusion showed the least image distortion and 100 % success rate of fiber tractography. Conclusions: Compared with SS-EPI, MS-EPI with motion correction significantly improves image distortions and increases the success rate of fiber tractography in CSM patients with metal implants.

KW - 3-T diffusion tensor imaging

KW - Cervical spondylotic myelopathy

KW - Multi-shot echo-planar imaging

KW - Postoperative

KW - Single-shot echo-planar imaging

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