Magnetic resonance imaging evaluation of normal glenoid length and width: An anatomic study

Brett A. Lenart, Ryan Freedman, Geoffrey S. Van Thiel, Aman Dhawan, Kevin C. McGill, Sanjib Basu, John R. Meyer, Cdr Matthew T. Provencher, Brian J. Cole, Anthony A. Romeo, Nikhil N. Verma

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Purpose The purpose of this study was to evaluate the measured dimensions of the normal glenoid on sagittal magnetic resonance (MR) imaging to determine whether a fixed ratio of glenoid length and width can be determined. Methods MR images of 90 glenoids in 84 patients were analyzed. The mean age was 54.8 years, with 44 male and 40 female patients. Glenoid length and width at the widest dimension were measured and recorded by 3 independent examiners. The ratio of length to width and the ratio of the length of the superior pole at the widest point to the total length were calculated. Intraclass correlation coefficients, Spearman and Pearson correlations, regression analysis with cross validation, and coefficients of variation were calculated. Results The mean glenoid length was 37.5 ± 3.8 mm, whereas the mean width was 24.4 ± 2.9 mm. The mean ratio of length to width was 1.55 ± 0.1, whereas the mean ratio of the distance from the superior pole to the widest point to the total glenoid length was 0.64 ± 0.03. The calculated ratios were less variable than the absolute length and width. Cross validation of length for width showed a 95% prediction band width of 4.48 mm, with an average absolute error of prediction of 1.46 mm, and was equally specific when separated by gender. The width was equal to 0.65 times the length. Conclusions Measurement of glenoid length and width using MR imaging results in a consistent ratio of length to width independent of patient age and gender, where the width was equal to 0.65 times the length at a point two-thirds along the inferosuperior axis.

Original languageEnglish (US)
Pages (from-to)915-920
Number of pages6
JournalArthroscopy - Journal of Arthroscopic and Related Surgery
Volume30
Issue number8
DOIs
StatePublished - Jan 1 2014

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Magnetic Resonance Imaging
Magnetic Resonance Spectroscopy
Regression Analysis

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine

Cite this

Lenart, Brett A. ; Freedman, Ryan ; Van Thiel, Geoffrey S. ; Dhawan, Aman ; McGill, Kevin C. ; Basu, Sanjib ; Meyer, John R. ; Provencher, Cdr Matthew T. ; Cole, Brian J. ; Romeo, Anthony A. ; Verma, Nikhil N. / Magnetic resonance imaging evaluation of normal glenoid length and width : An anatomic study. In: Arthroscopy - Journal of Arthroscopic and Related Surgery. 2014 ; Vol. 30, No. 8. pp. 915-920.
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title = "Magnetic resonance imaging evaluation of normal glenoid length and width: An anatomic study",
abstract = "Purpose The purpose of this study was to evaluate the measured dimensions of the normal glenoid on sagittal magnetic resonance (MR) imaging to determine whether a fixed ratio of glenoid length and width can be determined. Methods MR images of 90 glenoids in 84 patients were analyzed. The mean age was 54.8 years, with 44 male and 40 female patients. Glenoid length and width at the widest dimension were measured and recorded by 3 independent examiners. The ratio of length to width and the ratio of the length of the superior pole at the widest point to the total length were calculated. Intraclass correlation coefficients, Spearman and Pearson correlations, regression analysis with cross validation, and coefficients of variation were calculated. Results The mean glenoid length was 37.5 ± 3.8 mm, whereas the mean width was 24.4 ± 2.9 mm. The mean ratio of length to width was 1.55 ± 0.1, whereas the mean ratio of the distance from the superior pole to the widest point to the total glenoid length was 0.64 ± 0.03. The calculated ratios were less variable than the absolute length and width. Cross validation of length for width showed a 95{\%} prediction band width of 4.48 mm, with an average absolute error of prediction of 1.46 mm, and was equally specific when separated by gender. The width was equal to 0.65 times the length. Conclusions Measurement of glenoid length and width using MR imaging results in a consistent ratio of length to width independent of patient age and gender, where the width was equal to 0.65 times the length at a point two-thirds along the inferosuperior axis.",
author = "Lenart, {Brett A.} and Ryan Freedman and {Van Thiel}, {Geoffrey S.} and Aman Dhawan and McGill, {Kevin C.} and Sanjib Basu and Meyer, {John R.} and Provencher, {Cdr Matthew T.} and Cole, {Brian J.} and Romeo, {Anthony A.} and Verma, {Nikhil N.}",
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Lenart, BA, Freedman, R, Van Thiel, GS, Dhawan, A, McGill, KC, Basu, S, Meyer, JR, Provencher, CMT, Cole, BJ, Romeo, AA & Verma, NN 2014, 'Magnetic resonance imaging evaluation of normal glenoid length and width: An anatomic study', Arthroscopy - Journal of Arthroscopic and Related Surgery, vol. 30, no. 8, pp. 915-920. https://doi.org/10.1016/j.arthro.2014.03.006

Magnetic resonance imaging evaluation of normal glenoid length and width : An anatomic study. / Lenart, Brett A.; Freedman, Ryan; Van Thiel, Geoffrey S.; Dhawan, Aman; McGill, Kevin C.; Basu, Sanjib; Meyer, John R.; Provencher, Cdr Matthew T.; Cole, Brian J.; Romeo, Anthony A.; Verma, Nikhil N.

In: Arthroscopy - Journal of Arthroscopic and Related Surgery, Vol. 30, No. 8, 01.01.2014, p. 915-920.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Magnetic resonance imaging evaluation of normal glenoid length and width

T2 - An anatomic study

AU - Lenart, Brett A.

AU - Freedman, Ryan

AU - Van Thiel, Geoffrey S.

AU - Dhawan, Aman

AU - McGill, Kevin C.

AU - Basu, Sanjib

AU - Meyer, John R.

AU - Provencher, Cdr Matthew T.

AU - Cole, Brian J.

AU - Romeo, Anthony A.

AU - Verma, Nikhil N.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Purpose The purpose of this study was to evaluate the measured dimensions of the normal glenoid on sagittal magnetic resonance (MR) imaging to determine whether a fixed ratio of glenoid length and width can be determined. Methods MR images of 90 glenoids in 84 patients were analyzed. The mean age was 54.8 years, with 44 male and 40 female patients. Glenoid length and width at the widest dimension were measured and recorded by 3 independent examiners. The ratio of length to width and the ratio of the length of the superior pole at the widest point to the total length were calculated. Intraclass correlation coefficients, Spearman and Pearson correlations, regression analysis with cross validation, and coefficients of variation were calculated. Results The mean glenoid length was 37.5 ± 3.8 mm, whereas the mean width was 24.4 ± 2.9 mm. The mean ratio of length to width was 1.55 ± 0.1, whereas the mean ratio of the distance from the superior pole to the widest point to the total glenoid length was 0.64 ± 0.03. The calculated ratios were less variable than the absolute length and width. Cross validation of length for width showed a 95% prediction band width of 4.48 mm, with an average absolute error of prediction of 1.46 mm, and was equally specific when separated by gender. The width was equal to 0.65 times the length. Conclusions Measurement of glenoid length and width using MR imaging results in a consistent ratio of length to width independent of patient age and gender, where the width was equal to 0.65 times the length at a point two-thirds along the inferosuperior axis.

AB - Purpose The purpose of this study was to evaluate the measured dimensions of the normal glenoid on sagittal magnetic resonance (MR) imaging to determine whether a fixed ratio of glenoid length and width can be determined. Methods MR images of 90 glenoids in 84 patients were analyzed. The mean age was 54.8 years, with 44 male and 40 female patients. Glenoid length and width at the widest dimension were measured and recorded by 3 independent examiners. The ratio of length to width and the ratio of the length of the superior pole at the widest point to the total length were calculated. Intraclass correlation coefficients, Spearman and Pearson correlations, regression analysis with cross validation, and coefficients of variation were calculated. Results The mean glenoid length was 37.5 ± 3.8 mm, whereas the mean width was 24.4 ± 2.9 mm. The mean ratio of length to width was 1.55 ± 0.1, whereas the mean ratio of the distance from the superior pole to the widest point to the total glenoid length was 0.64 ± 0.03. The calculated ratios were less variable than the absolute length and width. Cross validation of length for width showed a 95% prediction band width of 4.48 mm, with an average absolute error of prediction of 1.46 mm, and was equally specific when separated by gender. The width was equal to 0.65 times the length. Conclusions Measurement of glenoid length and width using MR imaging results in a consistent ratio of length to width independent of patient age and gender, where the width was equal to 0.65 times the length at a point two-thirds along the inferosuperior axis.

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U2 - 10.1016/j.arthro.2014.03.006

DO - 10.1016/j.arthro.2014.03.006

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JO - Arthroscopy - Journal of Arthroscopic and Related Surgery

JF - Arthroscopy - Journal of Arthroscopic and Related Surgery

SN - 0749-8063

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