在常规临床实践中,腰椎管狭窄症(LSS)的存在是在通常使用预选的脊柱矢状角获取的轴向磁共振图像(MRI)上评估的.鉴于腰椎的自然前凸,并非所有的轴向切片都将平行于椎间盘并垂直于椎管,因此,不是评估硬膜囊横截面积(DCSA)的最佳方法。
本研究的目的是比较常规采集的临床图像与三维(3D)重建图像的DCSA测量结果。
这是一项横断面研究。
样本包括390名接受腰椎成像的患者,这些患者具有某些解剖LSS,之前没有背部手术,40岁或以上,并且具有可用的体积MR图像以允许脊柱的3D重建。
本研究感兴趣的结果是硬膜囊横截面积。
脊柱图像在椎间盘水平进行了三维重建,垂直于椎管。使用捕获的切片方向测量3D重建和常规采集的临床图像的硬脑膜囊横截面积。
在常规获取的临床图像和3D重建图像之间,下腰椎水平(L4-L5和L5-S1)的硬脑膜囊横截面积明显不同。测量标准误差为12.98和19.73mm(2),分别。
当人们对运河的大小感兴趣时,特别是当LSS影响下腰椎水平时,应考虑临床图像的3D重建。
In routine clinical practice, the presence of lumbar spinal stenosis (LSS) is assessed on axial magnetic resonance images (MRI) typically acquired using a preselected spine sagittal angle. Given the natural lordosis of the lumbar spine, not all axial slices will be parallel to the disc and perpendicular to the spinal canal and, thus, are not optimal for the assessment of dural sac cross-sectional area (DCSA).
The objective of this study was to compare DCSA measurements from routinely acquired clinical images with three-dimensional (3D)-reconstructed images.
This is a cross-sectional study.
The sample consists of 390 patients referred for lumbar imaging with some aspect of anatomical LSS found, with no prior back surgery, 40 years of age or older, and with available volumetric MR images to allow 3D reconstruction of the spine.
The outcome of interest in this study was dural sac cross sectional area.
Spine images were 3D reconstructed at the level of the disc, perpendicular to the spinal canal. Dural sac cross-sectional area was measured for both 3D-reconstructed and routinely acquired clinical images using the slice orientation captured.
Dural sac cross-sectional area for the lower lumbar levels (L4-L5 and L5-S1) was significantly different between routinely acquired clinical images and 3D-reconstructed images, with a standard error of measurement of 12.98 and 19.73 mm(2), respectively.
When canal size is of interest, particularly when LSS affecting the lower lumbar levels is of concern, 3D reconstruction of clinical images should be considered.