Objective: 1. Using magnetic resonance imaging conventional sequences to diagnose distal radial epiphyseal plate injury in young athletes, providing Magnetic Resonance Imaging information for sports medicine, and guiding scientific sports training. 2. By measuring the thickness of distal radial epiphyseal plate, monitoring the development of bone of young athlete, discussing long-term diving load whether is able to actively accelerate bone growth or inhibit bone growth caused by distal radial epiphyseal plate injury. 3. Discussion the application of quantitative T1ρ imaging in distal radial epiphyseal plate injury. Methods: 38 professional young diving athletes and 25 age-matched healthy volunteers (control group) underwent bilateral wrist 1.5T MRI scan. Scanning sequences comprises a conventional sequence (T1WI, FS-T2WI, 3D-FS-SPGR) and quantitative MR sequences (T1ρ). MRI conventional sequence features of distal radial epiphyseal plate were analyzed by two professor of radiologists, detection rate of the wrist distal radial epiphyseal plate injury in athletes, distal radial epiphyseal plate injury were divided into group A, no distal radial epiphyseal plate injury were divided into group B, the control group were divided into group C. T1ρ values and thickness of distal radial epiphyseal plate different areas (opposite the boat phrenology weight-bearing area, opposite the month phrenology weight-bearing area, the lateral weight-bearing area) were separately measured on T1ρ pseudo-color pictures and T1WI sequence. Completely random design anlysis of variance were applied to compared the distal radial epiphyseal plate thickness and T1ρ value between A, B, C groups, Further Bonferroni test were applied to compared to each two groups. Finally the difference of T1ρ value in different Region of Interest were statistically analyzed with one-way ANOVA . Results: 1. A total of 76 cases of athletes wrist, 29 cases (29/76, 38.15%) of distal radial epiphyseal plate injury. MRI showed epiphyseal plate irregular widening, T1WI showed slightly higher signal, FS-T2WI sequence showed a high signal, SPGR sequence showed high signal; the metaphysis metaphysis irregular thickening. 2. Group A (29 cases), B (47 cases), C (50 cases), There were statistically significant differences (P=0.000) among three groups of epiphyseal plate thickness, and group A (3.26 ± 0.76mm) were higher than group B (2.16 ± 0.55mm) than group C (1.70 ± 0.38mm). 3. T1ρ value of distal radial epiphyseal plate in group A and B lower than group C (P=0.000), there was statistically significant difference. T1ρ value of distal radial epiphyseal plate between groups A and B was not statistically significant difference (P=0.881). T1ρ value of distal radial epiphyseal plate was not statistically significant difference among regions of interest (P> 0.05). Conclusion: 1. The rate of distal radial epiphyseal plate injury in young diver was 38.15%, MRI can clearly show the epiphyseal plate injury, providing reliable imaging evidence for sports medicine. 2. The epiphyseal plate thickness of young diver wider than the control group, suggesting that athletes bone growth slowly than normal, sport can inhibit the growth of epiphyseal plate. 3. Quantitative T1ρ imaging can early detection epiphyseal plate internal ultrastructure and cell molecular level change, before MRI conventional sequences found epiphyseal plate injury morphological changes.