Abstract
To analyze the diagnostic value of magnetic resonance imaging (MRI) in epiphyseal injury of adolescent children, MRI images of 26 adolescent knee joint injuries were selected. The image display before and after reconstruction based on the compressed sensing theory (CS) algorithm was compared and analyzed, so did the signal-to-noise ratio of knee MRI reconstructed images under 2D random sampling and radial sampling at different sampling rates. The results showed that the sharpness, specificity, and accuracy of images reconstructed by the CS algorithm were significantly higher than those before reconstructionP<0.05. When the sampling rates were almost the same (20%, 40%, and 60%), the signal-to-noise ratio (SNR) of the reconstructed knee MRI images by random sampling was higher than that by radial sampling (about 9%, 6%, and 3% higher, respectively), that is, the information contained by random sampling was larger than that by radial sampling. It overcame the defects of undisplaced epiphyseal injuries in children and adolescents that cannot be found by plain X-ray films and can clearly and accurately diagnose epiphyseal injuries and fracture types that cannot be seen by plain X-ray films. To sum up, the MRI image reconstruction algorithm based on compressed sensing theory can effectively improve the diagnosis effect of knee epiphyseal injury.
Highlights
One patient in type V had compression of the epiphyseal plate, and seven patients in type VI had an epiphyseal injury. ere were 5 cases of distal femoral epiphyseal injury and 2 cases of proximal tibial epiphyseal injury, which were confined to the epiphyseal and did not involve the epiphyseal plate, as shown in Table 1. e contrast images of magnetic resonance imaging (MRI) images before and after reconstruction under compressed sensing theory (CS) theory of some patients are shown in Figures 3 and 4
3 cases of distal femoral epiphyseal fracture and 2 cases of proximal tibial epiphyseal fracture, and the fracture line extended through the epiphyseal plate to the epiphyseal
MRI is increasingly used in the diagnosis of bone and joint injuries, and the application value of MRI imaging features based on the reconstruction algorithm under the compressed sensing theory in diagnosing cartilage injuries is the current focus of imaging research
Summary
En, abnormal bone growth and development is caused, which significantly affects the physical and mental health of children. Clinical imaging examination is the main way to evaluate the degree of epiphyseal injury in adolescents and children, including X-ray plain film examination, ultrasound examination, CT examination, and MRI examination [6]. For older children with osteochondral structure becoming more mature, ultrasound is limited in the range of display by bone shadow, resulting in the overlapping phenomenon and affecting the diagnosis results [7, 8]. It can carry out continuous tomography imaging in sagittal and coronal positions of bone and joint, which successfully overcomes the disadvantages of X-ray plain imaging showing overlapping and CT plain scanning axial imaging, saving
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