Usefulness of slice encoding for metal artifact correction (SEMAC) for reducing metallic artifacts in 3-T MRI

Young Han Lee, Daekeon Lim, Eun Ju Kim, Sungjun Kim, Ho Taek Song, Jin Suck Suh

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Purpose: The purpose of the study was to assess the usefulness of slice encoding for metal artifact correction (SEMAC) in 3.0-T magnetic resonance (MR) in minimizing metallic artifacts in patients with spinal prostheses. Materials and Methods: Institutional review board approval and informed consent were obtained for this study. Twenty-seven spine MR scans were performed with metal artifact reduction SEMAC between May 2011 and July 2012 in patients with metallic devices. The MR scans were performed on a 3-T MR system (Achieva; Philips Healthcare, Best, the Netherlands) including SEMAC-corrected T2-weighted axial/sagittal images and two-dimensional fast spin echo (FSE) axial/sagittal images. The SEMAC-corrected images were compared to conventional T2-weighted FSE images. Two musculoskeletal radiologists qualitatively analyzed the images in terms of visualization of the pedicle, vertebral body, dural sac, intervertebral disc, intervertebral neural foramina, screws and metallic artifacts. The paired images were rated using a 5-point scale. P values less than .05 were considered to indicate statistically significant differences. Results: The SEMAC-corrected MR images significantly reduced the metal-related artifacts. The T2-weighted images with SEMAC sequences enabled significantly improved periprosthetic visualizations of the pedicle, vertebral body, dural sac and neural foramina, with the exception of the intervertebral disc (P<. 05). In addition, there was significant improvement in prosthesis visualization (P<. 05). Conclusion: MR images with SEMAC can reduce metal-related artifacts, providing improved delineation of the prosthesis and periprosthetic region. However, for the evaluation of the intervertebral disc, the SEMAC-corrected MR images showed no significant benefits.

Original languageEnglish
Pages (from-to)703-706
Number of pages4
JournalMagnetic Resonance Imaging
Volume31
Issue number5
DOIs
Publication statusPublished - 2013 Jan 3

Fingerprint

Magnetic resonance imaging
Artifacts
Metals
Magnetic resonance
Magnetic Resonance Spectroscopy
Intervertebral Disc
Visualization
Prostheses and Implants
Prosthetics
Research Ethics Committees
Informed Consent
Netherlands
Spine
Delivery of Health Care
Equipment and Supplies

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

Cite this

Lee, Young Han ; Lim, Daekeon ; Kim, Eun Ju ; Kim, Sungjun ; Song, Ho Taek ; Suh, Jin Suck. / Usefulness of slice encoding for metal artifact correction (SEMAC) for reducing metallic artifacts in 3-T MRI. In: Magnetic Resonance Imaging. 2013 ; Vol. 31, No. 5. pp. 703-706.
@article{17af0c61dd5b42d1a7e5e35780869b21,
title = "Usefulness of slice encoding for metal artifact correction (SEMAC) for reducing metallic artifacts in 3-T MRI",
abstract = "Purpose: The purpose of the study was to assess the usefulness of slice encoding for metal artifact correction (SEMAC) in 3.0-T magnetic resonance (MR) in minimizing metallic artifacts in patients with spinal prostheses. Materials and Methods: Institutional review board approval and informed consent were obtained for this study. Twenty-seven spine MR scans were performed with metal artifact reduction SEMAC between May 2011 and July 2012 in patients with metallic devices. The MR scans were performed on a 3-T MR system (Achieva; Philips Healthcare, Best, the Netherlands) including SEMAC-corrected T2-weighted axial/sagittal images and two-dimensional fast spin echo (FSE) axial/sagittal images. The SEMAC-corrected images were compared to conventional T2-weighted FSE images. Two musculoskeletal radiologists qualitatively analyzed the images in terms of visualization of the pedicle, vertebral body, dural sac, intervertebral disc, intervertebral neural foramina, screws and metallic artifacts. The paired images were rated using a 5-point scale. P values less than .05 were considered to indicate statistically significant differences. Results: The SEMAC-corrected MR images significantly reduced the metal-related artifacts. The T2-weighted images with SEMAC sequences enabled significantly improved periprosthetic visualizations of the pedicle, vertebral body, dural sac and neural foramina, with the exception of the intervertebral disc (P<. 05). In addition, there was significant improvement in prosthesis visualization (P<. 05). Conclusion: MR images with SEMAC can reduce metal-related artifacts, providing improved delineation of the prosthesis and periprosthetic region. However, for the evaluation of the intervertebral disc, the SEMAC-corrected MR images showed no significant benefits.",
author = "Lee, {Young Han} and Daekeon Lim and Kim, {Eun Ju} and Sungjun Kim and Song, {Ho Taek} and Suh, {Jin Suck}",
year = "2013",
month = "1",
day = "3",
doi = "10.1016/j.mri.2012.11.004",
language = "English",
volume = "31",
pages = "703--706",
journal = "Magnetic Resonance Imaging",
issn = "0730-725X",
publisher = "Elsevier Inc.",
number = "5",

}

Usefulness of slice encoding for metal artifact correction (SEMAC) for reducing metallic artifacts in 3-T MRI. / Lee, Young Han; Lim, Daekeon; Kim, Eun Ju; Kim, Sungjun; Song, Ho Taek; Suh, Jin Suck.

In: Magnetic Resonance Imaging, Vol. 31, No. 5, 03.01.2013, p. 703-706.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Usefulness of slice encoding for metal artifact correction (SEMAC) for reducing metallic artifacts in 3-T MRI

AU - Lee, Young Han

AU - Lim, Daekeon

AU - Kim, Eun Ju

AU - Kim, Sungjun

AU - Song, Ho Taek

AU - Suh, Jin Suck

PY - 2013/1/3

Y1 - 2013/1/3

N2 - Purpose: The purpose of the study was to assess the usefulness of slice encoding for metal artifact correction (SEMAC) in 3.0-T magnetic resonance (MR) in minimizing metallic artifacts in patients with spinal prostheses. Materials and Methods: Institutional review board approval and informed consent were obtained for this study. Twenty-seven spine MR scans were performed with metal artifact reduction SEMAC between May 2011 and July 2012 in patients with metallic devices. The MR scans were performed on a 3-T MR system (Achieva; Philips Healthcare, Best, the Netherlands) including SEMAC-corrected T2-weighted axial/sagittal images and two-dimensional fast spin echo (FSE) axial/sagittal images. The SEMAC-corrected images were compared to conventional T2-weighted FSE images. Two musculoskeletal radiologists qualitatively analyzed the images in terms of visualization of the pedicle, vertebral body, dural sac, intervertebral disc, intervertebral neural foramina, screws and metallic artifacts. The paired images were rated using a 5-point scale. P values less than .05 were considered to indicate statistically significant differences. Results: The SEMAC-corrected MR images significantly reduced the metal-related artifacts. The T2-weighted images with SEMAC sequences enabled significantly improved periprosthetic visualizations of the pedicle, vertebral body, dural sac and neural foramina, with the exception of the intervertebral disc (P<. 05). In addition, there was significant improvement in prosthesis visualization (P<. 05). Conclusion: MR images with SEMAC can reduce metal-related artifacts, providing improved delineation of the prosthesis and periprosthetic region. However, for the evaluation of the intervertebral disc, the SEMAC-corrected MR images showed no significant benefits.

AB - Purpose: The purpose of the study was to assess the usefulness of slice encoding for metal artifact correction (SEMAC) in 3.0-T magnetic resonance (MR) in minimizing metallic artifacts in patients with spinal prostheses. Materials and Methods: Institutional review board approval and informed consent were obtained for this study. Twenty-seven spine MR scans were performed with metal artifact reduction SEMAC between May 2011 and July 2012 in patients with metallic devices. The MR scans were performed on a 3-T MR system (Achieva; Philips Healthcare, Best, the Netherlands) including SEMAC-corrected T2-weighted axial/sagittal images and two-dimensional fast spin echo (FSE) axial/sagittal images. The SEMAC-corrected images were compared to conventional T2-weighted FSE images. Two musculoskeletal radiologists qualitatively analyzed the images in terms of visualization of the pedicle, vertebral body, dural sac, intervertebral disc, intervertebral neural foramina, screws and metallic artifacts. The paired images were rated using a 5-point scale. P values less than .05 were considered to indicate statistically significant differences. Results: The SEMAC-corrected MR images significantly reduced the metal-related artifacts. The T2-weighted images with SEMAC sequences enabled significantly improved periprosthetic visualizations of the pedicle, vertebral body, dural sac and neural foramina, with the exception of the intervertebral disc (P<. 05). In addition, there was significant improvement in prosthesis visualization (P<. 05). Conclusion: MR images with SEMAC can reduce metal-related artifacts, providing improved delineation of the prosthesis and periprosthetic region. However, for the evaluation of the intervertebral disc, the SEMAC-corrected MR images showed no significant benefits.

UR - http://www.scopus.com/inward/record.url?scp=84877140927&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84877140927&partnerID=8YFLogxK

U2 - 10.1016/j.mri.2012.11.004

DO - 10.1016/j.mri.2012.11.004

M3 - Article

VL - 31

SP - 703

EP - 706

JO - Magnetic Resonance Imaging

JF - Magnetic Resonance Imaging

SN - 0730-725X

IS - 5

ER -