Deep learning method for segmentation of rotator cuff muscles on MR images.
Skeletal Radiol
; 50(4): 683-692, 2021 Apr.
Article
em En
| MEDLINE
| ID: mdl-32939590
ABSTRACT
OBJECTIVE:
To develop and validate a deep convolutional neural network (CNN) method capable of (1) selecting a specific shoulder sagittal MR image (Y-view) and (2) automatically segmenting rotator cuff (RC) muscles on a Y-view. We hypothesized a CNN approach can accurately perform both tasks compared with manual reference standards. MATERIAL ANDMETHODS:
We created 2 models model A for Y-view selection and model B for muscle segmentation. For model A, we manually selected shoulder sagittal T1 Y-views from 258 cases as ground truth to train a classification CNN (Keras/Tensorflow, Inception v3, 16 batch, 100 epochs, dropout 0.2, learning rate 0.001, RMSprop). A top-3 success rate evaluated model A on 100 internal and 50 external test cases. For model B, we manually segmented subscapularis, supraspinatus, and infraspinatus/teres minor on 1048 sagittal T1 Y-views. After histogram equalization and data augmentation, the model was trained from scratch (U-Net, 8 batch, 50 epochs, dropout 0.25, learning rate 0.0001, softmax). Dice (F1) score determined segmentation accuracy on 105 internal and 50 external test images.RESULTS:
Model A showed top-3 accuracy > 98% to select an appropriate Y-view. Model B produced accurate RC muscle segmentations with mean Dice scores > 0.93. Individual muscle Dice scores on internal/external datasets were as follows subscapularis 0.96/0.93, supraspinatus 0.97/0.96, and infraspinatus/teres minor 0.97/0.95.CONCLUSIONS:
Our results show overall accurate Y-view selection and automated RC muscle segmentation using a combination of deep CNN algorithms.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Manguito Rotador
/
Aprendizado Profundo
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article