摘要
ＯｂｊｅｃｔｉｖｅｓＴｏｅｓｔａｂｌｉｓｈｔｈｅｎｏｒｍａｌｐａｔｅｒｎｓｏｆｌｕｍｂａｒｖｅｒｔｅｂｒａｌｍａｒｏｗｉｎｎｏｒｍａｌＣｈｉｎｅｓｅ，ｔｏｄｅｔｅｒｍｉｎｅｉｔｓｎｏｒｍａｌｖａｌｕｅｏｆｒｅｌａｘａｔｉｏｎｔｉｍｅｓ（Ｔ１ａｎｄＴ２...
Objectives To establish the normal patterns of lumbar vertebral marrow in normal Chinese, to determine its normal value of relaxation times (T1 and T 2), and to investigate the relationship between relaxation time and age or sex Methods 320 of 1000 cases (sampled randomly) received MR imaging Acco r ding to the MRI findings of sagittal T1WI, marrow patterns were established 2 68 cases were studied quantitatively (T1 and T2 measurements) Results The normal bone marrow patterns of lumbar vertebra were divided into four main patterns (six subgroups) The normal values of relaxation times (T1 and T2) were measured T1 or T2 value decreased with aging No sig ni ficant difference in T1 value between two sexes (<40 years old: u=04307, P >050; 40 years old: u=0554, P >005) No signi ficant difference was seen in T2 value between two sexes before 40 years old ( u=13628, P >010), but significant difference after 40 years old ( u=21498, P <005) Conclusions To establish the normal patterns of lumbar vertebral marrow and determine its normal values of relaxation times have important clinical val ue in the diagnosis of bone marrow diseases
