呼吸时相及探测深度对肝弹性测量值的影响

摘要

Purpose To investigate the effect of respiration and detection depth on liver elasticity measurement by Supersonic shear wave elasticity imaging (SSI). Materials and Methods A total of 121 male volunteers were included in the study. A shear-wave elasto-sonography (AixPlorer model, Supersonic Imagine, Aix en Provence, France) coupled with a convex array probe (1-6MHz) was used to measure and compare the elasticity in the end of inspiration with that in the end of expiration at the detection depth of 2-4cm and 6-8cm. Results At the detection depth of 2-4cm ,the elasticity modulus of liver was 6.026+1.482 kPa in the end of expiration and 6.097+1.628 kPa in the end of inspiration. At the depth of 6-8cm, the elasticity modulus of liver was 6.758+2.035 kPa in the end of expiration and 6.976+2.142 kPa in the end of inspiration. Compare the elasticity modulus in the end of inspiration with that in the end of expiration, the difference has no statistical significance (P > 0.05). In the end of inspiration, the elasticity modulus of liver was 6.097+1.682 kPa at the depth of 2-4cm and 6.976+2.142 kPa at the depth of 6-8cm. In the end of expiration, the elasticity modulus of liver was 6.026+1.482 kPa at the depth of 2-4cm and 6.758+2.035 kPa at the depth of 6-8cm. These differences were statistically significant (P < 0.05). Conclusion Respiratory status has no effect on the liver elasticity measurements. With increase of the detection depth, the elasticity modulus increases.%目的 评价探测深度及呼吸时相对Supersonic剪切波弹性成像技术(SSI)测量肝弹性值的影响.资料与方法 121例男性志愿者均使用SupersonicImagine公司AixPlore型实时定量剪切波超声弹性成像超声诊断仪,1-6MHz凸阵探头.嘱受检者深呼吸,分别在吸气末和呼气末于肝右叶2-4cm、6-8cm深度测量肝弹性模量值并进行比较.结果深度为2-4cm处测量,呼气末肝弹性模量值为6.026±1.482kPa,吸气末肝弹性模量值为6.097±1.628kPa;深度为6～8cm处测量,呼气末肝弹性模量值为6.758±2.035kPa,吸气末肝弹性模量值为6.976±2.142kPa.呼气末与吸气末肝弹性模量值比较,差异无统计学意义P>0.05;2-4cm深度与6-8cm深度肝弹性模量值比较,差异有统计学意义P<0.05.结论 运用SSI测量肝弹性模量值时,受检者呼吸时相对肝弹性模量值测量无影响;测量深度影响肝弹性模量值的测量,随着深度的增加,肝弹性模模量有所增加.