目的比较磁共振T2-mapping与质子密度加权像(PDWI)成像在髌软骨军事训练伤中的早期诊断价值。方法对78例关节进行磁共振检查,数据传输到GE工作站(ADW4.6),经Functool中T2-mapping软件处理后产生髌软骨的伪彩图,选择puh thallium和3 colors,色彩范围20~80 ms,用2 ms作为增量。分析轴位PDWI和T2-mapping图像,确认软骨异常病灶,在PDWI序列上软骨损伤病灶定义为髌软骨信号强度改变,在T2-mapping上软骨病灶定义为肉眼能看到的T2值明显升高的局限性区域,将病灶和彩色尺度条比较进行分级,在T2-mapping伪彩图3 colors上将病灶分3个等级,一级蓝色(20~40 ms),二级绿色(41~60 ms),三级红色(61~80ms)。结果 T2-mapping显示髌软骨异常者78例共89个病灶,在T2-mapping伪彩图上分级,一级病灶32个,二级病灶48个,三级病灶9个。其中45个病灶在T2-mapping与PDWI上均能发现,占51%,但T2-mapping显示的深度与宽度大于PDWI。余44个病灶仅在T2-mapping上发现,占49%,其中一级病灶30个,占34%,二级病灶14个,占16%。三级病灶9个占10%,在T2-mapping与PDWI上均能发现,显示深度与宽度基本相同。结论 T2-mapping成像通过测量T2弛豫时间可发现没有发生明显形态学改变的髌软骨早期损伤的组织成分变化,从而有效指导临床早期诊断及治疗,防止软骨发生不可逆性损伤,对保证战士战斗力具有重要的军事和临床价值。 Objective To compare the early diagnostic value of magnetic resonance T2-mapping and proton density-weighted imaging (PDWI) imaging in the military training of patella cartilage. Methods Magnetic resonance imaging was performed on 78 patients. The data were transmitted to GE workstation (ADW4.6) and processed by Functool’s T2-mapping software to generate a pseudo-color map of the patellar cartilage. Puh thallium and 3 colors were selected and the color range was 20-80 ms, using 2 ms as an increment. Axial PDWI and T2-mapping images were analyzed to identify an abnormal cartilage lesion. Cartilage lesions on the PDWI sequence were defined as changes in patellofemoral signal intensity, and cartilage lesions on T2-mapping were defined as a significant increase in T2 visible to the naked eye In the limited area, the lesion was compared with the color scale, and the lesion was divided into three grades, one blue (20-40 ms), two green (41-60 ms) ), Three red (61 ~ 80ms). Results T2-mapping showed a total of 89 lesions in 78 patients with patellar cartilage abnormalities. There were 32 primary lesions, 48 ​​secondary lesions and 9 tertiary lesions on T2-mapping pseudo-color images. Forty-five lesions were found on T2-mapping and PDWI, accounting for 51% of the total, but T2-mapping showed greater depth and width than PDWI. Totally 44 lesions were found only in T2-mapping, accounting for 49%, of which 30 lesions were primary lesions (34%) and 14 secondary lesions (16%). Nine of the three lesions accounted for 10%, both in T2-mapping and PDWI can be found, showing the same depth and width. Conclusion T2-mapping imaging can detect the change of tissue components of early patellar cartilage damage without obvious morphological changes by measuring T2 relaxation time, so as to effectively guide early clinical diagnosis and treatment, prevent irreversible cartilage damage, and ensure the combat effectiveness of soldiers Important military and clinical value.