Department of Ultrasound, First Affiliated Hospital of Anhui Medical University, Hefei, China.
Department of Ultrasound, First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen Second People's Hospital, Shenzhen, China.
J Ultrasound Med. 2024 May;43(5):863-872. doi: 10.1002/jum.16416. Epub 2024 Jan 19.
To investigate the application value of shear wave dispersion (SWD) in healthy adults with the lumbar multifidus muscle (LMM), to determine the range of normal reference values, and to analyze the influences of factors on the parameter.
Ninety-five healthy volunteers participated in the study, from whom 2-dimensional, shear wave elastography (SWE), and SWD images of the bilateral LMM were acquired in three positions (prone, standing, and anterior flexion). Subcutaneous fat thickness (SFH), SWE velocity, and SWD slope were measured accordingly for analyses.
The mean SWD slope of the bilateral LMM in the prone position was as follows: left: 14.8 ± 3.1 (m/second)/kHz (female) and 13.0 ± 2.5 (m/second)/kHz (male); right: 14.8 ± 3.7 (m/second)/kHz (female) and 14.2 ± 3.4 (m/second)/kHz (male). In the prone position, there was a weak negative correlation between the bilateral LMM SWD slope of activity level 2 and level 1 (β = -1.5 (2 versus 1, left), -1.9 (2 versus 1, right), all P < .05), and between the left SWD slope of activity level 3 and level 1 (β = -2.3 [3 versus 1, left], P < .05). The correlation between SWE velocity and SWD slope value changed with the position: there was a weak positive correlation in the prone position (r = 0.3 [left], 0.37 [right], both P < .05), and a moderate positive correlation in the standing and anterior flexed positions (r = 0.49-0.74, both P < .001). SFH was moderately negatively correlated with bilateral SWD slope values in the anterior flexion (left: r = -0.4, P = .01; right: r = -0.7, P < .01).
SWD imaging can be used as an adjunct tool to aid in the assessment of viscosity in LMM. Further, activity level, and position are influencing factors that should be considered in clinical practice.
研究剪切波弥散度（SWD）在健康腰多裂肌（LMM）中的应用价值，确定正常参考值范围，并分析各参数的影响因素。
95 名健康志愿者参与研究，分别在俯卧位、站立位和前屈位对双侧 LMM 进行二维、剪切波弹性成像（SWE）和 SWD 成像，测量相应的皮下脂肪厚度（SFH）、SWE 速度和 SWD 斜率。
俯卧位时双侧 LMM 的平均 SWD 斜率如下：左侧：14.8±3.1（m/秒）/kHz（女性）和 13.0±2.5（m/秒）/kHz（男性）；右侧：14.8±3.7（m/秒）/kHz（女性）和 14.2±3.4（m/秒）/kHz（男性）。在俯卧位时，双侧 LMM 的活动水平 2 与水平 1 的 SWD 斜率呈弱负相关（β=-1.5（2 比 1，左侧），-1.9（2 比 1，右侧），均 P<0.05），左侧 LMM 活动水平 3 与水平 1 的 SWD 斜率呈弱负相关（β=-2.3[3 比 1，左侧]，P<0.05）。SWE 速度与 SWD 斜率值之间的相关性随体位而变化：俯卧位时呈弱正相关（r=0.3[左侧]，0.37[右侧]，均 P<0.05），站立位和前屈位时呈中高度正相关（r=0.49-0.74，均 P<0.001）。SFH 与前屈位双侧 SWD 斜率值呈中度负相关（左侧：r=-0.4，P=0.01；右侧：r=-0.7，P<0.01）。
SWD 成像可作为一种辅助工具，用于评估 LMM 的粘度。此外，活动水平和体位是临床实践中应考虑的影响因素。
