Lumbar Spine Anatomy in Supine versus Weight- Bearing Magnetic Resonance Imaging: Detecting Significant Positional Changes and Testing Reliability of Quantification.

IF 2.3 Q2 ORTHOPEDICS Asian Spine Journal Pub Date : 2024-02-01 Epub Date: 2024-01-30 DOI:10.31616/asj.2023.0203
Niladri Kumar Mahato, Paramanand Maharaj, Brian C Clark
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Abstract

Study design: Testing between and within group differences and assessing reliability of measurements.

Purpose: To study and compare lumbar spine morphology in supine and weight-bearing (WB) magnetic resonance imaging (MRI).

Overview of literature: Upright lumbar MRI may uncover anatomical changes that may escape detection when using conventional supine imaging. This study quantified anatomical dimensions of the lumbar spine in the supine and WB MRI, compared specific morphometric differences between them, and tested the intra-rater reliability of the measurements. Repeated measures analysis was used to compare within- and between-session measurements performed on the supine and WB images. Reliability and agreement were assessed by calculating intraclass correlation (ICC) coefficient.

Methods: Data from 12 adults without any history of back pain were used in this study. Sagittal T2-weighted images of the lumbar spine were acquired in the supine and WB positions twice (in two separate sessions scheduled within a week). Linear, angular dimensions, and cross-sectional areas (CSAs) were measured using proprietary software. Supine and WB data acquired from the two imaging sessions were tested for intra-rater reliability. Quantified data were normalized for each session to test the significance of differences. ICC was calculated to test the reliability of the measurements.

Results: Linear, angular, and CSA measurements demonstrated strong within-position (supine and WB) correlations (r -values, 0.75-0.97). Between-position (supine vs. WB) differences were significant for all measured dimensions (p<0.05). Between-session measurements demonstrated a strong correlation (r -values, 0.64-0.83). Calculated ICC showed strong agreement among the measurements.

Conclusions: Anatomical dimensions of the lumbar spine may demonstrate consistent and significant differences between supine and WB MRI for specific structural parameters.

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仰卧与负重磁共振成像中的腰椎解剖:检测显著的位置变化并测试量化的可靠性。
研究设计目的:研究并比较仰卧和负重(WB)磁共振成像(MRI)中的腰椎形态:文献综述:直立腰椎磁共振成像可发现传统仰卧位成像无法发现的解剖学变化。本研究量化了仰卧位磁共振成像和WB磁共振成像中腰椎的解剖尺寸,比较了两者之间的具体形态差异,并测试了测量结果的评分者内部可靠性。重复测量分析用于比较在仰卧和腹部图像上进行的会内和会间测量。通过计算类内相关系数(ICC)来评估可靠性和一致性:本研究使用了 12 名无背痛病史的成年人的数据。在仰卧位和卧床位两次采集腰椎矢状位 T2 加权图像(分别在一周内进行两次)。使用专有软件测量线性、角度尺寸和横截面积(CSA)。对两次成像所获得的仰卧位和卧位数据进行了评分者内部可靠性测试。对每个疗程的量化数据进行归一化处理,以检验差异的显著性。计算 ICC 以检验测量结果的可靠性:结果:线性、角度和 CSA 测量值在体位内(仰卧和 WB)显示出很强的相关性(r 值为 0.75-0.97)。所有测量尺寸在体位间(仰卧与俯卧)差异显著(p结论:就特定结构参数而言,腰椎的解剖尺寸在仰卧位和腹部 MRI 之间可能存在一致且显著的差异。
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来源期刊
Asian Spine Journal
Asian Spine Journal ORTHOPEDICS-
CiteScore
5.10
自引率
4.30%
发文量
108
审稿时长
24 weeks
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