Validity and reliability of computerized measurement of lumbar intervertebral disc height and volume from magnetic resonance images

Neubert, Aleš; Fripp, Jürgen; Engstrom, Craig; Gal, Yaniv; Crozier, Stuart; Kingsley, Michael

doi:10.1016/j.spinee.2014.05.023

Cited by 20 publications

(27 citation statements)

References 44 publications

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“…Furthermore, recently presented validation studies showed a good reproducibility and validity of automated measurements obtained with the same segmentation techniques [22,49]. Most importantly, the automated measures were equivalent to manual measures in detecting acute morphological IVD changes in response to exercise [49]. Finally, obtaining accurate location, size and scoring in a CAD (the goal of the present study) does not necessarily require 'perfect' morphological segmentations.…”

Section: Real Data 321 Image Segmentationmentioning

confidence: 56%

“…Although comparison between 2D and 3D techniques that were validated on diverse datasets is complicated, the presented segmentation results are comparable to those presented in recent literature. Furthermore, recently presented validation studies showed a good reproducibility and validity of automated measurements obtained with the same segmentation techniques [22,49]. Most importantly, the automated measures were equivalent to manual measures in detecting acute morphological IVD changes in response to exercise [49].…”

Section: Real Data 321 Image Segmentationmentioning

confidence: 84%

“…In each sagittal slice, a line linearly connecting corners of adjacent vertebral bodies was defined (see [49] for more details). The IVD material posteriorly overpassing this line was quantified by its volume (absolute and relative to the whole IVD) and the distribution among sagittal slices (mean, variance, skewness and kurtosis) (Fig.…”

Section: Descriptive Statistics Of the Posterior Ivd Region (N = 6)mentioning

confidence: 99%

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Statistical shape model reconstruction with sparse anomalous deformations: Application to intervertebral disc herniation

Neubert

Fripp

Engstrom

et al. 2015

Computerized Medical Imaging and Graphics

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Please cite this article as: Aleš Neubert, Jurgen Fripp, Craig Engstrom, Daniel Schwarz, Marc-André Weber, Stuart Crozier, Statistical shape model reconstruction with sparse anomalous deformations: application to intervertebral disc herniation, Computerized Medical Imaging and Graphics (2015), http://dx.doi.org/10. 1016/j.compmedimag.2015.05.002 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractMany medical image processing techniques rely on accurate shape modeling of anatomical features. The presence of shape abnormalities challenges traditional processing algorithms based on strong morphological priors. In this work, a sparse shape reconstruction from a statistical shape model is presented. It combines the advantages of traditional statistical shape models (defining a 'normal' shape space) and previously presented sparse shape composition (providing localized descriptors of anomalies). The algorithm was incorporated into our image segmentation and classification software. Evaluation was performed on simulated and clinical MRI data from 22 sciatica patients with intervertebral disc herniation, containing 35 herniated and 97 normal discs. Moderate to high correlation (R = 0.73) was achieved * Corresponding author Room 512, General Purpose South Building (78 A c c e p t e d M a n u s c r i p t between simulated and detected herniations. The sparse reconstruction provided novel quantitative features describing the herniation morphology and MRI signal appearance in three dimensions (3D). The proposed descriptors of local disc morphology resulted to the 3D segmentation accuracy of 1.07±1.00 mm (mean absolute vertex-to-vertex mesh distance over the posterior disc region), and improved the intervertebral disc classification from 0.888 to 0.931 (area under receiver operating curve). The results show that the sparse shape reconstruction may improve computer-aided diagnosis of pathological conditions presenting local morphological alterations, as seen in intervertebral disc herniation.

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Section: Real Data 321 Image Segmentationmentioning

confidence: 56%

Section: Real Data 321 Image Segmentationmentioning

confidence: 84%

Section: Descriptive Statistics Of the Posterior Ivd Region (N = 6)mentioning

confidence: 99%

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Statistical shape model reconstruction with sparse anomalous deformations: Application to intervertebral disc herniation

Neubert

Fripp

Engstrom

et al. 2015

Computerized Medical Imaging and Graphics

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“…Before starting the analysis, we performed a preliminary comparison of the L5-S1 angle in some subjects (n = 28) that had undergone standard radiographs and an MRI less than 24 hours apart and found minor differences between the two techniques in this regard. In addition, it has been shown that MRI measurements of lumbar disc height and volume have sufficient validity and reliability [30]. …”

Section: Discussionmentioning

confidence: 99%

Revisiting Radiographic L5-S1 Parallelism Using MRI T1 Mapping

Galley

Balagué

2018

Journal of the Belgian Society of Radiology

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Purpose:Thirty years ago, we reported that parallel aspect of the L5-S1 disc on a lateral view of the spine might be considered to be an initial stage of disk degeneration. The current study represents an attempt to increase the validity of parallel sign on conventional radiograph using MR real T1 mapping.Methods:Forty-four young asymptomatic volunteers (mean age 21.6 ± 2.3) underwent lumbar spine MRI, twice the same day, morning and afternoon. Dedicated sequences using the inversion-recovery technique were used to calculate the T1 relaxation time. A region of interest (ROI) representing the nucleus pulposus was defined in each disk. The volunteers were stratified according to the presence or absence of a parallel morphology of L5-S1. Correlation between endplates angles, sacral slopes and T1 values were then evaluated.Results:L5-S1 space looks parallel for angles <10° (mean value 6.9° ± 1.4°). Sacral slope was lower in parallel disks (31.7 ± 4.9° vs. 40.1 ± 5.6°), showing a significant difference of 8.4° (p < 0.05). The T1 relaxation values show a significant difference between the two groups (p < 0.05) with a difference of 96 ms for the morning (1090.9 ± 33.3 ms for the parallel group and 1186.9 ± 41.2 ms for the non-parallel) and 121.9 ms for the afternoon (respectively 1004.7 ± 22.2 ms and 1126.6 ± 12.9 ms).Conclusion:The difference between the two groups suggests that parallel morphology of the L5-S1 disk is associated with lower water content.

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“…7 In another study, there was no significant relationship between the presence of disc herniation and spinal ganglion size. 8 In seven healthy asymptomatic men, Neubert et al 9 performed lumbar spine examinations using sagittal T2-weighted fast spin echo images with a 1.5 Tesla MRI scanner before and after exercise. Similar studies to evaluate diurnal variation were also made using T1 relaxation time.…”

Section: Discussionmentioning

confidence: 99%

The estimation of lumbar intervertebral disc volumes before and after exercise using the Cavalieri method

Özdikici

2018

MOJAP

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Purpose: Our aim in this study is to determine the volume differences of the lumbar intervertebral discs by using the Cavalieri method. Subjects and methods: In our study, lumbar magnetic resonance imaging (MRI) was performed on 20 male (mean age, 22 years; age range, 19-25 years) athletes without any known disease on the lumbar vertebra and discs immediately after resting and after a 50-minute loading exercise. The lumbar intervertebral disc volumes were measured by Cavalieri method and compared after resting and after exercise. Statistical analyses of the results were carried out to evaluate changes in the disc volume. Results: The mean volume of the three lower lumbar intervertebral discs (L2-L3, L3-L4, L4-L5) was 17 centimetres cube after resting and 15 centimetres cube after exercise. Total volume decreased from 51 centimetres cube to 45 centimetres cube. After a 50-minute loading exercise, a 12% reduction was detected (p<0.05). Conclusion: The reduction in the lumbar intervertebral disc volumes after exercise may be useful in providing predictive short-term information through the Cavalieri method.

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Validity and reliability of computerized measurement of lumbar intervertebral disc height and volume from magnetic resonance images

Abstract: Conclusions 15The presented semi-automated method provides an alternative to time-and expertise-intensive 16 manual procedures for analysis of larger cross-sectional, interventional and longitudinal MR studies 17 for morphometric analyses of lumbar IVDs. 18

Cited by 20 publications

References 44 publications

Statistical shape model reconstruction with sparse anomalous deformations: Application to intervertebral disc herniation

Statistical shape model reconstruction with sparse anomalous deformations: Application to intervertebral disc herniation

Revisiting Radiographic L5-S1 Parallelism Using MRI T1 Mapping

The estimation of lumbar intervertebral disc volumes before and after exercise using the Cavalieri method

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