改变参与者MRI扫描位置对背部肌肉体积测量的影响。

BJR open Pub Date : 2022-01-01 DOI:10.1259/bjro.20210051
Salman Alharthi, Jude Meakin, Chris Wright, Jonathan Fulford
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引用次数: 0

摘要

目的:肌肉体积可以反映力量和功能能力,因此是评估各种干预措施效果的一个参数。当前研究的目的是确定肌肉体积计算对参与者体位的敏感性,从而衡量纵向研究中可能出现的误差,特别是那些干预导致大肌肉变化和潜在脊柱弯曲程度的研究。方法:招募健康受试者20例(22-49岁,男10例,女10例),采用4种不同体位进行MRI成像;脊柱中性(P1),脊柱前凸减小(P2),脊柱前凸增大(P3),脊柱中性重复(P4)。在Simpleware ScanIP中分析图像,确定腰肌体积和Cobb角作为脊柱弯曲的指标。结果:体积测定比较,P1 - P2和P1 - P4无统计学差异,P2 - P3和P1 - P3有统计学差异。P2和P3代表脊柱弯曲的两个极端,Cobb角相差17°。然而,体积测定之间的平均差异仅为29 cm3。这些结果表明,肌肉体积测定的差异通常随着测量之间曲率差异的增加而增大,但总体上影响很小。结论:因此,一般而言,脊柱肌肉体积测定在参与者体位方面是可靠的。知识的进步:不同体位之间脊柱弯曲度的差异越大,肌肉体积计算的差异就越大。因此,在纵向研究中,脊柱曲度不应该对干预后的脊髓肌肉体积测定结果产生重大影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The impact of altering participant MRI scanning position on back muscle volume measurements.

The impact of altering participant MRI scanning position on back muscle volume measurements.

The impact of altering participant MRI scanning position on back muscle volume measurements.

The impact of altering participant MRI scanning position on back muscle volume measurements.

Objectives: Muscle volume may reflect both strength and functional capability and hence is a parameter often measured to assess the effect of various interventions. The aim of the current study was to determine the sensitivity of muscle volume calculations on participant postural position and hence gauge possible errors that may arise in longitudinal studies, especially those where an intervention leads to large muscle changes and potentially the degree of spinal curvature.

Methods: Twenty healthy participants (22-49 years, 10 male and 10 female), were recruited and MRI images acquired with them lying in four different positions; neutral spine (P1), decreased lordosis (P2), increased lordosis (P3) and neutral spine repeated (P4). Images were analysed in Simpleware ScanIP, and lumbar muscle volume and Cobb's angle, as an indicator of spine curvature, determined.

Results: After comparing volume determinations, no statistically significant differences were found for P1 - P2 and P1 - P4, whereas significant changes were determined for P2 - P3 and P1 - P3. P2 and P3 represent the two extremes of spinal curvature with a difference in Cobb's angle of 17°. However, the mean difference between volume determinations was only 29 cm3. These results suggest the differences in muscle volume determinations are generally greater with increasing differences in curvature between measurements, but that overall the effects are small.

Conclusions: Thus, generally, spinal muscle volume determinations are robust in terms of participant positioning.

Advances in knowledge: Differences in muscle volume calculations appear to become larger the greater the difference in spinal curvature between positions. Thus, spinal curvature should not have a major impact on the results of spinal muscle volume determinations following interventions in longitudinal studies.

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