CAJ | 학술논문

目的：（1）探讨CT值平均值与骨密度值之间的关系；（2）探索一种新的图像分割方法快速准确求解不同年龄段人群腰椎CT值。方法随机采集202例腰椎薄层CT扫描数据为实验材料，按照性别及每10岁为一个年龄段进行分组。各组数据输入至Mimics14.0通过新的图像分割方法分割腰椎为各个独立蒙板文件，进行空洞填补并直接读取其蒙板文件的CT值平均值、最大值及最小值。结果（1）男性21~70岁各年龄组的CT值平均值分别为424.94±52.23、405.59±53.60、361.76±53.50、344.17±47.76、332.88±58.33 Hu；女性组分别为439.89±50.99、448.06±65.89、421.43±54.74、369.07±78.27、304.98±55.05 Hu；（2）统计学分析：男性61~70岁组与21~50岁各组比较，P<0.05，与51~60岁组比较，P>0.05；女性51~70岁各组与21~50岁年龄段各组比较，P<0.05。结论（1）CT值平均值与骨密度值具有相关性；（2）通过新的图像分割方法可以快速准确获取感兴趣区域的CT值；（3）腰椎CT值平均值具有随着年龄增大而降低的特点。
목적：（1）탐토CT치평균치여골밀도치지간적관계；（2）탐색일충신적도상분할방법쾌속준학구해불동년령단인군요추CT치。방법수궤채집202례요추박층CT소묘수거위실험재료，안조성별급매10세위일개년령단진행분조。각조수거수입지Mimics14.0통과신적도상분할방법분할요추위각개독립몽판문건，진행공동전보병직접독취기몽판문건적CT치평균치、최대치급최소치。결과（1）남성21~70세각년령조적CT치평균치분별위424.94±52.23、405.59±53.60、361.76±53.50、344.17±47.76、332.88±58.33 Hu；녀성조분별위439.89±50.99、448.06±65.89、421.43±54.74、369.07±78.27、304.98±55.05 Hu；（2）통계학분석：남성61~70세조여21~50세각조비교，P<0.05，여51~60세조비교，P>0.05；녀성51~70세각조여21~50세년령단각조비교，P<0.05。결론（1）CT치평균치여골밀도치구유상관성；（2）통과신적도상분할방법가이쾌속준학획취감흥취구역적CT치；（3）요추CT치평균치구유수착년령증대이강저적특점。
Objective To investigate the relationship between the mean CT value and bone density value and explore a rapid and accurate image segmentation method for lumbar CT values in different age groups. Methods We randomly collected thin lumbar spine CT scan data from 202 patients stratified by gender and age (at the interval of 10 years). The data of each group were imported into Mimics 14.0 software to obtain independent Mask files using the new image segmentation method. The Mask files were used to fill the empty space and calculate mean, maximum, and minimum CT values. Results In the age groups of 21-30, 31-40, 41-50, 51-60, and 61-70 years, the male subjects had mean CT values of 424.94 ± 52.23 Hu, 405.59 ± 53.60 Hu, 361.76 ± 53.50 Hu, 344.17 ± 47.76 Hu, and 332.88 ± 58.33 Hu, respectively;the values in the female group were 439.89 ± 50.99 Hu, 448.06±65.89 Hu, 421.43±54.74 Hu, 369.07±78.27 Hu, and 304.98±55.05 Hu, respectively. The mean CT value in men aged 61-70 years was significantly lower than the values in men below 50 years (P<0.05), but comparable with that in those aged 51-60 years (P>0.05); The mean CT value was significantly lower in women aged 51-70 years groups than in those aged below 50 years (P<0.05). Conclusions The mean CT values are correlated with the bone density values. The new image segmentation method allows rapid and accurate acquisition of the CT values in the regions of interest. The lumbar mean CT values tend to decrease with age.