Three-Dimensional CT Scans Improve Accuracy in Measuring Glenoid Bone Loss

2013 ◽  
Vol 3 (2) ◽  
pp. e8 ◽  
Author(s):  
John-Erik Bell
Keyword(s):  
Bone Loss ◽  
Three Dimensional ◽  
Glenoid Bone Loss ◽  
Ct Scans ◽  
Improve Accuracy

scholarly journals Automated 3D MRI Allows for Accurate Evaluation of Glenoid Bone Loss as Compared to 3D CT

2018 ◽  
Vol 6 (7_suppl4) ◽  
pp. 2325967118S0008
Author(s):  
Drew A. Lansdown ◽  
Robert Dawe ◽  
Gregory L. Cvetanovich ◽  
Nikhil N. Verma ◽  
Brian J. Cole ◽  
...  
Keyword(s):  
Bone Loss ◽  
3D Reconstruction ◽  
Ct Scan ◽  
Glenoid Bone Loss ◽  
Ct Scans ◽  
Reconstruction Method ◽  
Slice Thickness ◽  
3D Ct ◽  
Ct Reconstruction ◽  
3D Mri

Objectives: Glenoid bone loss is frequently present in the setting of recurrent shoulder instability. The magnitude of bone loss is an important determinant of the optimal surgical treatment. The current gold-standard for measurement of glenoid bone loss is three-dimensional (3D) reconstruction of a computed tomography (CT) scan. CT scans, however, carry an inherent risk of radiation and increased cost for a second modality. Magnetic resonance imaging (MRI) offers excellent soft tissue contrast and may allow resolution of bony structures to generate 3D reconstructions without a risk of ionizing radiation. We hypothesized that automated 3D MRI reconstruction would offer similar measurements of glenoid bone loss as recorded from a 3D CT scan in a clinical setting. Methods: A retrospective review was performed for fourteen patients who had both pre-operative MRI scan and CT scan of the shoulder. All MR scans were performed on a 1.5 T scanner (Siemens) utilizing a Dixon chemical shift separation sequence and the out-of-phase images with 0.90 mm slice thickness. Reconstructions of the glenoid were performed from axial images (Figure 1A) using an open-platform image processing system (3D Slicer; slicer.org). A single point on the glenoid was selected and a standard threshold was used to build a 3D model (Figure 1B). High-resolution CT scans underwent 3D reconstruction in Slicer based on Houndsfield Unit thresholding. Glenoid bone loss on both scans was measured with the Pico method by defining a circle of best fit using the inferior 2/3 of the glenoid and determining the percent area missing from this circle. Pearson’s correlation coefficient was utilized to determine the similarity between MR and CT based measurements. Statistical significance was defined as p<0.05. Results: The correlation between 3D MR and CT-based measurements of glenoid bone loss was excellent (r = 0.95, p<0.0001). The mean bone loss as measured by the 3D MR was 13.2 +- 7.2% and was 12.5 +- 8.6% for the 3D CT reconstruction (p=0.32). Bone loss in this cohort ranged from 3.7-25.4% on 3D MR and 1.4-26.0% on 3D CT. The root-mean-square difference between measurements was 2.7%. Conclusion: There was excellent agreement between automated 3D MR and 3D CT measurements of glenoid bone loss and minimal differences between these measurements. This reconstruction method requires minimal post-processing, no manual segmentation, and is obtained with widely-available MR sequences. This method has the potential to decrease the utilization for CT scans in determining glenoid bone loss. [Figure: see text]

ROLE OF 3D CT SCAN IN QUANTIFYING GLENOID BONE LOSS IN RECURRENT UNILATERAL SHOULDER DISLOCATION

2021 ◽  
pp. 173-177
Author(s):  
Shivprasad Jaybhay ◽  
Madhuri Misal
Keyword(s):  
Bone Loss ◽  
Predictive Value ◽  
Shoulder Dislocation ◽  
False Negative ◽  
Three Dimensional ◽  
High Sensitivity ◽  
Cross Sectional Study ◽  
Glenoid Bone Loss ◽  
Cross Sectional ◽  
Recurrent Shoulder Dislocation

Purpose: Patients with recurrent shoulder instability often present with osseous injury to the glenoid and humeral head. Glenoid bone loss can easily be quantied on a three-dimensional computed tomography scan by modeling the inferior portion of the glenoid contour as a true circle on an en face view. This study investigated the accuracy of CT in determining the presence and severity of glenoid bone loss in patients with unilateral recurrent shoulder dislocation. Methodology: This prospective cross-sectional study was done among patients with unilateral recurrent shoulder dislocation. Forty patients with anterior shoulder dislocation underwent shoulder CT examination before arthroscopy. Results: Glenoid bone loss was evident in 38 (95%) of the 40 patients at arthroscopy. Compared with arthroscopy, CT had sensitivity in detecting glenoid bone loss of 92.1%; specicity, 100%; positive predictive value, 100%; and negative predictive value, 40.0%. Three false-negative CT assessments had 5%, 5%, and 20% glenoid bone loss, respectively, at arthroscopy. There was a strong correlation between CT and arthroscopy with respect to the severity of glenoid bone loss (r = 0.73). Conclusion: CT has both a high sensitivity and a high specicity for detecting glenoid bone loss, and agreement with arthroscopy regarding the severity of glenoid bone loss is good. CT can be used to assess glenoid bone loss and the need for bone augmentation surgery.

Quantitative analysis of glenoid bone loss in osteoarthritis using three-dimensional computed tomography scans

2008 ◽  
Vol 17 (2) ◽  
pp. 328-335 ◽  
Author(s):  
Jason J. Scalise ◽  
Jason Bryan ◽  
Joshua Polster ◽  
John J. Brems ◽  
Joseph P. Iannotti
Keyword(s):  
Computed Tomography ◽  
Quantitative Analysis ◽  
Bone Loss ◽  
Three Dimensional ◽  
Glenoid Bone Loss ◽  
Computed Tomography Scans

scholarly journals Three-dimensional MRI Bone Models of the Glenohumeral Joint Using Deep Learning: Evaluation of Normal Anatomy and Glenoid Bone Loss

2020 ◽  
Vol 2 (5) ◽  
pp. e190116
Author(s):  
Tatiane Cantarelli Rodrigues ◽  
Cem M. Deniz ◽  
Erin F. Alaia ◽  
Natalia Gorelik ◽  
James S. Babb ◽  
...  
Keyword(s):  
Deep Learning ◽  
Bone Loss ◽  
Glenohumeral Joint ◽  
Three Dimensional ◽  
Glenoid Bone Loss ◽  
Normal Anatomy ◽  
Learning Evaluation

scholarly journals State-of-the art treatment of bony defects in anterior shoulder instability—the European perspective

2020 ◽  
Author(s):  
Philipp Moroder
Keyword(s):  
Bone Loss ◽  
Three Dimensional ◽  
Activity Level ◽  
Glenoid Bone Loss ◽  
Patient Specific ◽  
Anterior Shoulder Instability ◽  
Specific Factors ◽  
Tissue Stabilization ◽  
Glenoid Reconstruction ◽  
Augmentation Procedure

AbstractDepending on their size, all glenoid defects lead to a certain amount of loss of glenohumeral stability and therefore may represent a risk factor for the recurrence of instability after soft tissue stabilization procedures. The degree of loss of stability depends not only on the extent of the defect but also on differences in individual constitutional shape, which need to be analyzed in a three-dimensional context. Additionally, patient-specific factors such as age and activity level have a significant influence on the clinical effect of glenoid bone loss. Therefore, when treating a patient with glenoid bone loss, a bony glenoid reconstruction surgery in the form of a free bone graft transfer or Latarjet should be considered based on the extent of the defect, native glenoid shape, age, and activity level. Furthermore, in the presence of a relevant Hill–Sachs defect, the addition of a remplissage to a Bankart procedure should be considered or the use of a bony glenoid augmentation procedure instead.

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