Comparison Between 3-Dimensional Multiple-Echo Recombined Gradient Echo Magnetic Resonance Imaging and Arthroscopic Findings for the Evaluation of Acetabular Labrum Tear

Higashihira, Shota; Kobayashi, Naomi; Oishi, Takayuki; Choe, Han-Cheol; Ike, Hiroyuki; Tezuka, T.; Inaba, Yutaka

doi:10.1016/j.arthro.2019.05.006

Cited by 9 publications

(24 citation statements)

References 30 publications

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“…The combination of the MERGE sequence with radial plane multiplanar reconstruction improves the ability "to accurately capture the full circumference of the labrum" while eliminating the potential risk and patient discomfort associated with arthrography. 4 The findings of this study are quite interesting. For a cohort of 71 hips, the anterolateral region was the most common location for labral tears.…”

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confidence: 60%

“…In "Comparison Between 3-Dimensional Multiple-Echo Recombined Gradient Echo Magnetic Resonance Imaging and Arthroscopic Findings for the Evaluation of Acetabular Labrum Tear," 4 Higashihira, Kobayashi, Oishi, Choe, Ike, Tezuka, and Inaba explore the utility of a novel MRI technique in the identification of labral tears. This subject matter is particularly relevant, given the specific diagnostic challenge that preoperative evaluation of intra-articular hip pathology presents.…”

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confidence: 99%

“…The MERGE MRI sequence is notable for its "wide-band acquisition," which is "suitable for the visualization of cartilage and soft tissue." 4 Moreover, the use of multiplanar reconstruction allowed for reconfiguration of the acquired axial images into the radial plane. The combination of the MERGE sequence with radial plane multiplanar reconstruction improves the ability "to accurately capture the full circumference of the labrum" while eliminating the potential risk and patient discomfort associated with arthrography.…”

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confidence: 99%

“…1,2,10 In their investigation, Schleich et al 9 found sensitivity, specificity, and accuracy of 98%, 76.2%, and 95.9%, respectively, for the detection of labral tears. A large part of what makes the study by Higashihira et al 4 unique, and ultimately compelling, is the description of labral tear frequency relative to acetabular location. In my opinion, therein lies the potential for this line of study to truly enhance clinical practice.…”

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confidence: 99%

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Editorial Commentary: Advances in 3-Dimensional Imaging are the Key to Improving our Surgical Precision in Hip Arthroscopy and Beyond

Owusu-Akyaw

2019

Arthroscopy: The Journal of Arthroscopic & Related Surgery

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Section: See Related Article On Page 2857mentioning

confidence: 60%

Section: See Related Article On Page 2857mentioning

confidence: 99%

Section: See Related Article On Page 2857mentioning

confidence: 99%

Section: See Related Article On Page 2857mentioning

confidence: 99%

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Editorial Commentary: Advances in 3-Dimensional Imaging are the Key to Improving our Surgical Precision in Hip Arthroscopy and Beyond

Owusu-Akyaw

2019

Arthroscopy: The Journal of Arthroscopic & Related Surgery

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“…Specifically, an oblique axial plane vertical to the femoral neck axis was reconstructed such that the most anterior slice was identified at 9 o'clock and the most lateral slice was identified at 12 o'clock, according to a previously described method. 9 Figure 2 shows the method for measurements of the alpha angle on radial MRI. Briefly, the alpha angle was measured at each clockface position with the same method used for the radiographic alpha angle as described above.…”

Section: Mri and Measurement Of Radial Alpha Angle And Signal Intensitymentioning

confidence: 99%

Correlations and Reproducibility Between Radiographic and Radial Alpha Angles in the Evaluation of Cam Morphology

Kobayashi

Sumi

Higashihira

et al. 2020

Orthopaedic Journal of Sports Medicine

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Background: The alpha angle used to evaluate cam morphology can be determined on different imaging views; however, 2-dimensional (2D) imaging can present limitations in terms of the reproducibility of the radial alpha angle. Recent developments in 3-dimensional (3D) high-resolution magnetic resonance imaging (MRI) have allowed detailed evaluations of the radial alpha angle. Purpose: To determine whether there are any correlations or discrepancies between the 2D alpha angle on plain radiography and the maximum radial alpha angle on 3D MRI. Study Design: Cohort study (diagnosis); Level of evidence, 2. Methods: A total of 42 hips from 39 patients (19 males, 20 females) were analyzed, including 22 hips with femoroacetabular impingement (FAI; mean age, 41 years) and 20 hips with borderline developmental dysplasia of the hip (BDDH; mean age, 43 years). Radial images were reconstructed from 3D multiple echo recombined gradient echo (MERGE) MRI. Differences in the maximum radial alpha angle on MRI between hips with FAI and BDDH were evaluated. Correlations and discrepancies between the maximum radial alpha angle on MRI and alpha angles on the anteroposterior, cross-table lateral, and 45° Dunn views of radiography were also evaluated. Results: The maximum radial alpha angle was significantly higher for hips with FAI than for hips with BDDH. On average, the greatest alpha angle on radial MRI was higher than the alpha angle on each of the 3 radiographic views for both FAI and BDDH. The 45° Dunn view revealed the smallest discrepancy for both FAI ( P = .005) and BDDH ( P = .002). The cross-table lateral view had the highest correlation with the maximum radial alpha angle for BDDH ( P < .001). Conclusion: We reconfirmed the utility of the 45° Dunn view, with it presenting the best reproducibility for the maximum radial alpha angle in the evaluation of cam morphology, while the cross-table lateral view revealed the best correlation with the maximum radial alpha angle, particularly for hips with BDDH.

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A Deep Learning Approach for MRI in the Diagnosis of Labral Injuries of the Hip Joint

Wen

Chen

et al. 2022

Magnetic Resonance Imaging

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Background:The diagnosis of labral injury on MRI is time-consuming and potential for incorrect diagnoses. Purpose: To explore the feasibility of applying deep learning to diagnose and classify labral injuries with MRI. Study Type: Retrospective. Population: A total of 1016 patients were divided into normal (n = 168, class 0) and abnormal labrum (n = 848) groups. The abnormal group consisted of n = 111 with class 1 (degeneration), n = 437 with class 2 (partial or complete tear), and n = 300 with unclassified injury. Patients were randomly divided into training, validation, and test cohort according to the ratio of 55%:15%:30%. Field Strength/Sequence: Fat-saturation proton density-weighted fast spin-echo sequence at 3.0 T. Assessment: Convolutional neural network-6 (CNN-6) was used to extract, discriminate, and detect oblique coronal (OCOR) and oblique sagittal (OSAG) images. Mask R-CNN was used for segmentation. LeNet-5 was used to diagnose and classify labral injuries. The weighting method combined the models of OCOR and OSAG. The output-input connection was used to correlate the whole diagnosis/classification system. Four radiologists performed subjective diagnoses to obtain the diagnosis results. Statistical Tests: CNN-6 and LeNet-5 were evaluated by area under the receiver operating characteristic (ROC) curve and related parameters. The mean average precision (MAP) evaluated the Mask R-CNN. McNemar's test was used to compare the radiologists and models. A P value < 0.05 was considered statistically significant. Results: The area under the curve (AUC) of CNN-6 was 0.99 for extraction, discrimination, and detection. MAP values of Mask R-CNN for OCOR and OSAG image segmentation were 0.96 and 0.99. The accuracies of LeNet-5 in the diagnosis and classification were 0.94/0.94 (OCOR) and 0.92/0.91 (OSAG), respectively. The accuracy of the weighted models in the diagnosis and classification were 0.94 and 0.97, respectively. The accuracies of radiologists in the diagnosis and classification of labrum injuries ranged from 0.85 to 0.92 and 0.78 to 0.94, respectively. Data Conclusion: Deep learning can assist radiologists in diagnosing and classifying labrum injuries.

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Comparison Between 3-Dimensional Multiple-Echo Recombined Gradient Echo Magnetic Resonance Imaging and Arthroscopic Findings for the Evaluation of Acetabular Labrum Tear

Cited by 9 publications

References 30 publications

Editorial Commentary: Advances in 3-Dimensional Imaging are the Key to Improving our Surgical Precision in Hip Arthroscopy and Beyond

Editorial Commentary: Advances in 3-Dimensional Imaging are the Key to Improving our Surgical Precision in Hip Arthroscopy and Beyond

Correlations and Reproducibility Between Radiographic and Radial Alpha Angles in the Evaluation of Cam Morphology

A Deep Learning Approach for MRI in the Diagnosis of Labral Injuries of the Hip Joint

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