Normal Vertebral Body Dimensions: A New Measurement Method Using MRI

Cyteval, C.; Thomas, E; Picot, M.-C.; Derieffy, P.; Blotman, F; Taourel, P.

doi:10.1007/s001980200056

Cited by 13 publications

(9 citation statements)

References 17 publications

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“…The volume of the cavity, inclusive of the interface elements, was 13.4% of the total volume of the vertebral body, which is comparable with the reported proportional filling of vertebral bodies with bone cement. 25,41,42 Material and element properties (ie, thickness of shells) were extracted from the published studies for bone (endplate, cancellous, and cortical), degenerated disc, and bone cement. The material properties, thickness of shells (where applicable), and types of elements are listed in Table 1.…”

Section: Methodsmentioning

confidence: 99%

The Biomechanical Effects of Kyphoplasty on Treated and Adjacent Nontreated Vertebral Bodies

Villarraga¹,

Bellezza²,

Harrigan³

et al. 2005

Journal of Spinal Disorders &Amp; Techniques

100

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It remains unclear whether adjacent vertebral body fractures are related to the natural progression of osteoporosis or if adjacent fractures are a consequence of augmentation with bone cement. Experimental or computational studies have not completely addressed the biomechanical effects of kyphoplasty on adjacent levels immediately following augmentation. This study presents a validated two-functional spinal unit (FSU) T12-L2 finite element model with a simulated kyphoplasty augmentation in L1 to predict stresses and strains within the bone cement and bone of the treated and adjacent nontreated vertebral bodies. The findings from this multiple-FSU study and a recent retrospective clinical study suggest that changes in stresses and strains in levels adjacent to a kyphoplasty-treated level are minimal. Furthermore, the stress and strain levels found in the treated levels are less than injury tolerance limits of cancellous and cortical bone. Therefore, subsequent adjacent level fractures may be related to the underlying etiology (weakening of the bone) rather than the surgical intervention.

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Section: Methodsmentioning

confidence: 99%

The Biomechanical Effects of Kyphoplasty on Treated and Adjacent Nontreated Vertebral Bodies

Villarraga¹,

Bellezza²,

Harrigan³

et al. 2005

Journal of Spinal Disorders &Amp; Techniques

100

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“…MRI studies where the dimensional accuracy was important have been reported by a number of authors [6][7][8][9][10]. Accuracy depends on numerous factors, including scanning parameters and segment size.…”

Section: Introductionmentioning

confidence: 99%

Magnetic resonance imaging technology in transtibial socket research: A pilot study

Buis¹,

Condon²,

Brennan³

et al. 2006

JRRD

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Abstract-Investigations into the shape and volume of transtibial prosthetic sockets are complicated because of the difficulty in establishing an accurate reference grid. Magnetic resonance imaging (MRI) presents a possible solution to this problem. However, the reliability of MRI in defining the residual-limb/cast interface depends on the scanned image not being distorted by the materials present. We investigated the potential of MRI technology to establish the desired reference grid. Distortion from the so-called "chemical shift" may influence the MRI when certain materials are used during the casting process. These materials include plaster of paris (POP) and silicone (in the form of an interface liner). POP is commonly used to capture the shape of the residual limb. However, if the casting technique requires the use of a silicone liner, the liner is placed over the residual limb first and then the POP is applied over the liner. Experimental results indicate that the materials used do not distort or interfere with the scanned image. The object segmentation process that extracts the bone and skin from an MRI scan and enables the establishment of the required reference grid was explored. Results show that extracting the bone structure and using it as the reference grid to quantify the differences in volume and shape of the soft tissues of the residual limb is feasible.

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“…However, there is a note of caution, the material used for the tested phantoms is not a representation for soft tissue. Cyteval et al [21] measured vertebral body dimensions using MRI, in order to compare the MRI measurement of vertebral area and volume with direct cadaver measurements. In their study, water displacement was used for volume measurement of cadaver vertebra.…”

Section: Discussionmentioning

confidence: 99%

Accuracy Verification of Magnetic Resonance Imaging (MRI) Technology for Lower-Limb Prosthetic Research: Utilising Animal Soft Tissue Specimen and Common Socket Casting Materials

Safari

Rowe

Buis

2012

The Scientific World Journal

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Lower limb prosthetic socket shape and volume consistency can be quantified using MRI technology. Additionally, MRI images of the residual limb could be used as an input data for CAD-CAM technology and finite element studies. However, the accuracy of MRI when socket casting materials are used has to be defined. A number of six, 46 mm thick, cross-sections of an animal leg were used. Three specimens were wrapped with Plaster of Paris (POP) and the other three with commercially available silicone interface liner. Data was obtained by utilising MRI technology and then the segmented images compared to corresponding calliper measurement, photographic imaging, and water suspension techniques. The MRI measurement results were strongly correlated with actual diameter, surface area, and volume measurements. The results show that the selected scanning parameters and the semiautomatic segmentation method are adequate enough, considering the limit of clinical meaningful shape and volume fluctuation, for residual limb volume and the cross-sectional surface area measurements.

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Normal Vertebral Body Dimensions: A New Measurement Method Using MRI

Cited by 13 publications

References 17 publications

The Biomechanical Effects of Kyphoplasty on Treated and Adjacent Nontreated Vertebral Bodies

The Biomechanical Effects of Kyphoplasty on Treated and Adjacent Nontreated Vertebral Bodies

Magnetic resonance imaging technology in transtibial socket research: A pilot study

Accuracy Verification of Magnetic Resonance Imaging (MRI) Technology for Lower-Limb Prosthetic Research: Utilising Animal Soft Tissue Specimen and Common Socket Casting Materials

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