The effect of sagittal rotation of the glenoid on axial glenoid width and glenoid version in computed tomography scan imaging

Daniel J. Gross, Petar Golijanin, Guillaume D. Dumont, Stephen Arthur Parada, Bryan G. Vopat, Steven E. Reinert, Anthony A. Romeo, CDR Matthew T. Provencher

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Background: Computed tomography (CT) scans of the shoulder are often not well aligned to the axis of the scapula and glenoid. The purpose of this paper was to determine the effect of sagittal rotation of the glenoid on axial measurements of anterior-posterior (AP) glenoid width and glenoid version attained by standard CT scan. In addition, we sought to define the angle of rotation required to correct the CT scan to optimal positioning. Methods: A total of 30 CT scans of the shoulder were reformatted using OsiriX software multiplanar reconstruction. The uncorrected (UNCORR) and corrected (CORR) CT scans were compared for measurements of both (1) axial AP glenoid width and (2) glenoid version at 5 standardized axial cuts. Results: The mean difference in glenoid version was 2.6% (2° ± 0.1°; P =.0222) and the mean difference in AP glenoid width was 5.2% (1.2 ± 0.42 mm; P =.0026) in comparing the CORR and UNCORR scans. The mean angle of correction required to align the sagittal plane was 20.1° of rotation (range, 9°-39°; standard error of mean, 1.2°). Conclusion: These findings demonstrate that UNCORR CT scans of the glenohumeral joint do not correct for the sagittal rotation of the glenoid, and this affects the characteristics of the axial images. Failure to align the sagittal image to the 12-o'clock to 6-o'clock axis results in measurement error in both glenoid version and AP glenoid width. Use of UNCORR CT images may have notable implications for decision-making and surgical treatment.

Original languageEnglish (US)
Pages (from-to)61-68
Number of pages8
JournalJournal of Shoulder and Elbow Surgery
Volume25
Issue number1
DOIs
StatePublished - Jan 1 2016
Externally publishedYes

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Tomography
Scapula
Shoulder Joint
Decision Making
Software

Keywords

  • 3D
  • Computed tomography
  • glenohumeral
  • glenoid
  • scapula
  • shoulder
  • version

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

The effect of sagittal rotation of the glenoid on axial glenoid width and glenoid version in computed tomography scan imaging. / Gross, Daniel J.; Golijanin, Petar; Dumont, Guillaume D.; Parada, Stephen Arthur; Vopat, Bryan G.; Reinert, Steven E.; Romeo, Anthony A.; Provencher, CDR Matthew T.

In: Journal of Shoulder and Elbow Surgery, Vol. 25, No. 1, 01.01.2016, p. 61-68.

Research output: Contribution to journalArticle

Gross, Daniel J. ; Golijanin, Petar ; Dumont, Guillaume D. ; Parada, Stephen Arthur ; Vopat, Bryan G. ; Reinert, Steven E. ; Romeo, Anthony A. ; Provencher, CDR Matthew T. / The effect of sagittal rotation of the glenoid on axial glenoid width and glenoid version in computed tomography scan imaging. In: Journal of Shoulder and Elbow Surgery. 2016 ; Vol. 25, No. 1. pp. 61-68.
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abstract = "Background: Computed tomography (CT) scans of the shoulder are often not well aligned to the axis of the scapula and glenoid. The purpose of this paper was to determine the effect of sagittal rotation of the glenoid on axial measurements of anterior-posterior (AP) glenoid width and glenoid version attained by standard CT scan. In addition, we sought to define the angle of rotation required to correct the CT scan to optimal positioning. Methods: A total of 30 CT scans of the shoulder were reformatted using OsiriX software multiplanar reconstruction. The uncorrected (UNCORR) and corrected (CORR) CT scans were compared for measurements of both (1) axial AP glenoid width and (2) glenoid version at 5 standardized axial cuts. Results: The mean difference in glenoid version was 2.6{\%} (2° ± 0.1°; P =.0222) and the mean difference in AP glenoid width was 5.2{\%} (1.2 ± 0.42 mm; P =.0026) in comparing the CORR and UNCORR scans. The mean angle of correction required to align the sagittal plane was 20.1° of rotation (range, 9°-39°; standard error of mean, 1.2°). Conclusion: These findings demonstrate that UNCORR CT scans of the glenohumeral joint do not correct for the sagittal rotation of the glenoid, and this affects the characteristics of the axial images. Failure to align the sagittal image to the 12-o'clock to 6-o'clock axis results in measurement error in both glenoid version and AP glenoid width. Use of UNCORR CT images may have notable implications for decision-making and surgical treatment.",
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AU - Provencher, CDR Matthew T.

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AB - Background: Computed tomography (CT) scans of the shoulder are often not well aligned to the axis of the scapula and glenoid. The purpose of this paper was to determine the effect of sagittal rotation of the glenoid on axial measurements of anterior-posterior (AP) glenoid width and glenoid version attained by standard CT scan. In addition, we sought to define the angle of rotation required to correct the CT scan to optimal positioning. Methods: A total of 30 CT scans of the shoulder were reformatted using OsiriX software multiplanar reconstruction. The uncorrected (UNCORR) and corrected (CORR) CT scans were compared for measurements of both (1) axial AP glenoid width and (2) glenoid version at 5 standardized axial cuts. Results: The mean difference in glenoid version was 2.6% (2° ± 0.1°; P =.0222) and the mean difference in AP glenoid width was 5.2% (1.2 ± 0.42 mm; P =.0026) in comparing the CORR and UNCORR scans. The mean angle of correction required to align the sagittal plane was 20.1° of rotation (range, 9°-39°; standard error of mean, 1.2°). Conclusion: These findings demonstrate that UNCORR CT scans of the glenohumeral joint do not correct for the sagittal rotation of the glenoid, and this affects the characteristics of the axial images. Failure to align the sagittal image to the 12-o'clock to 6-o'clock axis results in measurement error in both glenoid version and AP glenoid width. Use of UNCORR CT images may have notable implications for decision-making and surgical treatment.

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