Quantitative morphometric study of thoracic spine A preliminary parameters statistical analysis (original) (raw)
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Thoracic Pedicle Morphometry Study on Cadaver and CT Scan with Its Clinical Applications
International Journal of Anatomy and Research
Background: Morphometric measurements of a spine in the particular geographical area will help in proper implant selection during spinal surgeries, designing of best suited implant, understanding the biomechanics and pathoanatomy of the spine, precise clinical diagnosis and management of the population under consideration. Methods: In this study sample size was 100 [58 male and 42 female] embalmed and preserved thoracic spine [T1 to T12] aged 35 to 80 years at the time of death. Chord length [CL]: Measured from the posterior cortical entry point of the pedicle to the anterior vertebral cortex along the axis of the pedicle. All the linear measurements like Vertical interpedicular distance [VIPD], Transverse interpedicular distance [TIPD], Sagital angle [SA] measured using digital vernier calipers with resolution [0.01mm]. Result: In pedicle width however there was no significance difference [p > 0.05] between direct measurement and CT measurement in T1, T2 and T10 and other vertebral level there was significance difference [p < 0.05] between DM and CT. Pedicle Hight of the thoracic spine showed no significant difference [p > 0.05] between the direct measurement and the CT measurement in T3 and T8, but in other vertebral level there is significant difference [p < 0.05] between direct measurement and CT. A significant difference [p < 0.05] between direct measurement and CT measurement sagital angle values in all the vertebral levels was observed. Conclusion: Pedicle morphometry shows significant correlations in different parameters in most of the vertebral levels in direct measurement and in CT measurements. Also the multiple linear regressions was performed to obtain prediction equation taking direct measurement as dependant variable and CT scan measurements, age and gender as independent variables. The results of the present study can help in designing implants and instrumentations, understanding spine pathologies; and management of spinal disorder in this ethnic group.
Volumetric determination of normal and scoliotic vertebral bodies
European Spine Journal, 1998
Vertebral growth is a determining factor for the configuration of the spine in health and disease. There are several reports on vertebral growth per se and in relation to clinical aspects of idiopathic scoliosis (IS) , in Scheuermann's disease and in relation to the pathomechanism in experimental scoliosis . There are also reports on vertebral growth asymmetry during developement of scoliosis and still others vertebral growth after posterior spinal fusion or after spinal in-Abstract A new method is presented for stereological evaluation of the volume of the vertebral body in vivo. The height of the vertebral body is measured at three standardised points on an anteroposterior radiograph and at two other points on a lateral one. The area of the body is also measured using a special grid superimposed on a CT scan from the middle part of the vertebra. The volume of the vertebral body is then calculated using Cavalieri's principle for irregular objects: V = ∆a × H, where V is the volume of the vertebral body, ∆a is the mean cross-section surface area on the CT scan and H is the mean of the heights at the five points on the radiographs, computed as mean weighted circumferential height. The volume of one normal and one scoliotic vertebra was evaluated in vitro using this formula. The obtained values were compared with the values derived from serial CT scans of the two vertebrae. The results showed that the volume of the normal vertebra measured with our new method was 15.9 cm 3 and measured with serial CT scans using the same grid it was 15.07 cm 3 .
The radiological estimation of vertebral body volumes on the thoracic and lumbal spine
Collegium antropologicum, 2014
The aim of this work is to radiologicaly estimate the width, height and depth of bodies of thoracic and lumbal vertebras. Charts of one hundred and seventeen patients with implanted internal fixateur on the thoracic and lumbal spine, between 01.01.2008. and 31.3.2010. at the Department of Orthopedics and Traumatology - Clinical Centre Sarajevo, were retrieved, and only 14 patients, with totally 46 vetrtebras have meet including criteria (clearly visible measured structures on X-ray and CT scans, and data about implants dimensions). Digitalized anteroposterior and laterolateral X-ray, and transversal and sagital CT scans were basic inputs for measurement of height, width and depth of the vertebral body--CH, CW, CD. The correction of enlargement on X-ray pictures was performed according to known dimensions of implants and the length scale on CT scans. Enlargement of those parameters, from T1 to L5 spine level was from 60 to 100%, except the stagnation in the mid-thoracic region, and d...
Horizontal plane morphometry of normal and scoliotic vertebrae
European Spine Journal, 1995
Computed tomography (CT) scans are widely used for quantification of the morphology of the vertebral body and of the changes of the thoracic cage in the horizontal plane in scoliosis. So far, however, no method exists for precise quantification of the parameters of the posterior elements. We present a method for quantification on the basis of CT scans of different parameters of the morphology of both the vertebral body and posterior elements in the horizontal plane. The precision and accuracy of the method were estimated in a model study by CT scanning of a normal and a scoliotic vertebra in different, controlled, tilted positions. Moreover, in a clinical study CT scans of 19 thoracic vertebrae from non-scoliotic subjects and the apex vertebra from 40 scoliotic subjects were selected to test the applicability of the method to clinical studies. The intra-and interobserver variation of the measurements was analysed. The angle between the longitudinal axis of the vertebral body and that of the whole vertebra was used to evaluate the asymmetry of the vertebral body. The right to left pedicle width index, the right to left hemi-canal width index and the index of transverse process angles related to the axis of the vertebra were used to quantify the asymmetry of the posterior elements. The results indicate that, except for the pedicle width index, the variables under study were not significantly influenced by a 5 ~ or 10 ~ tilt ventrally, dorsally, or laterally of either the normal or the scoliotic vertebra. Hence, the method can be satisfactorily applied to longitudinal group comparisons. However, its use in longitudinal studies of individual patients is questionable.
Asian Spine Journal, 2011
S St tu ud dy y D De es si ig gn n: : Analysis of morphometric data obtained from direct measurements of 100 cadaveric thoracic spines in Indian population. P Pu ur rp po os se e: : To collect a base line morphometric data and analyze it in reference to the musculoskeletal anatomy and biomechanics of the spine; implants and instrumentations; and to suggest the requisite modification in spinal surgery instrumentations. O Ov ve er rv vi ie ew w o of f L Li it te er ra at tu ur re e: : Most of the previous studies in the world literature have focused primarily on the parameters of the pedicle and to the authors' knowledge; no study has been published from the Indian subcontinent reporting a detailed morphometry of the thoracic spine. M Me et th ho od ds s: : One thousand and two hundred thoracic vertebrae were studied by direct measurements for linear and angular dimensions of the vertebral body, spinal canal, pedicle, and spinous and transverse processes in 100 human cadavers.