低剂量螺旋CT三维重建在骨骺损伤早期诊断中的临床价值探讨

摘要

目的：研究低剂量螺旋CT三维重建在骨骺损伤中的成像质量及其对临床治疗的价值。方法随机选择16岁以下儿童骨骺损伤病例30例作为实验组，早期选择普通X线摄片和低剂量螺旋CT三维重建，根据低剂量螺旋CT三维重建确定骨骺损伤类型，指导临床治疗，随访2年，对疗效进行评估，选择经常规剂量CT检查患儿30例作为对照组，对两组CTDIvol值、DLP值、图像噪声、及图像质量评分均值，用t检验进行比较。结果通过30例患儿随访2年观察考核指标，两组CTDIvol 值分别为（9．6）和（2．4）mGy，DLP值分别为（156．60±4．30）和（25．40±7．99）mGy．cm，低剂量组较常规组下降约61．68％，两者差异有统计学意义（P＜0．05），低剂量组噪声均值略高于常规组（分别为11．36±2.95和16．42±2．96），t ＝－7．199，P＝0．000，但两组图像质量平均评分分别为（4．85±0．41）分和（4．81±0．44）分，差异无统计学意义（t＝0．465，P＞0．05）。结论低剂量螺旋CT三维重建技术可降低辐射剂量，且所得图像质量不影响诊断，可对骨骺损伤准确诊断，具有较高的临床价值。%Objective To explore the image quality and clinical value of dimensional reconstruction of Low-dose Multislice CT. Methods 30 cases of children with epiphyseal injuries who were under 16 years old randomly were selected as the experimental group.The group of X-ray radiography and dimensional reconstruc-tion of Low-dose Multislice CT were choosed respectivly to determine the type of epiphyseal injuries and take appropriate therapeutic measures.The efficacy of this treatment with 2-year follow-up was evaluated.30 chil-dren with epiphyseal injuries who were evaluated by the conventional dose CT examination were selected as a control group.With images quality score including CTDIvol,DLP being double-blinded,the image noise and quality score of the images were anlysed by t-test to assess its clinical value. Results The CTDIvol of two groups were (9.6)and (2.4)mGy,DLP were (156.60 ±4.30)and (25.40 ±7.99)mGy.cm.Group of low-dose declined about 61.68% compares with group of conventional-dose.Difference between two groups showed statistically significant(P<0.05).The average of noise was higher in group of low-dose compared with group of conventional-dose (each was 11.36 ±2.95 and 16.42 ±2.96),t =-7.199,P=0.000.But the mean image quality score〔(4.85 ±0.41)points and (4.81 ±0.44)points〕,have no statistically significant difference (t=0.465,P>0.05).From these appraisal indexes,we improved that dimensional reconstruction of Low-dose Multislice CT can parting epiphyseal injury precisely,also assist clinical diagnosis and treatment ef-fectively,and the result was satisfactory. Conclusion Dimensional reconstruction of Low-dose Multislice CT can reduce dose without influence diagnostics,It can dignose epiphyseal injuries correctly and have a high clini-cal value.