Suprasellar germ cell tumor with subarachnoid seeding MRI and MR spectroscopy findings

WOS: 000225554200003PubMed: 15531139A case of suprasellar germinoma with subarachnoid seeding is presented. Patient had a history of depression unresponsive to drug therapy and recently developed diabetes insipidus. MR imaging revealed a huge suprasellar mass, heterogenous in signal intensity due to cystic components. MR spectroscopy of the mass showed prominent lipid peak suggesting high malignant potential. (C) 2004 Elsevier Inc. All rights reserved

Morphometric analysis of occipitocervical region and cervical height in the female and male

In this study, midsagittal magnetic resonance images of 194 adults (101 females, 93 males) were evaluated morphologically. It was aimed to reveal the relationship between occipitocervical region and cervical height. The height of cervical vertebral column, height of axis, the distance of foramen magnum, the diameter of spinal canal and spinal cord at the level of C3 were measured. The distance of foramen magnum opening was measured as the distance between basion and opisthion. The correlation of these measurements in males and females, the differences between both sexes and possible effect of age were evaluated. There were positive correlations between the height of cervical vertebral column and axis height and between the distance of foramen magnum opening and spinal canal diameter at the level of C3 in males. There were positive correlations between the height of cervical vertebral column, and axis heigth, the distance of foramen magnum opening and the diameter of spinal canal at the level of C3 in females. There were statistically significant differences between males and females for the height of cervical vertebral column, the distance of foramen magnum opening and the diameter of spinal cord at C3 level. Males had higher values for these measurements. There was a statistically significant difference between the males who were over 40 years old and less than 40 years old when the diameter of spinal cord at the level of C3 was considered. As a result it could be suggested that upper cervical vertebrae changes are more evident in males whereas lower cervical vertebrae changes are more evident in females. © Gülhane Askeri Tip Akademisi 2007

Investigation of rock slope stability for an abandoned limestone quarry in Konya (Turkey)

12th International Symposium on Landslides, 2016 -- 12 June 2016 through 19 June 2016 -- -- 175519Slope stability problems were encountered in an abandoned quarry which is planned to be used as recreational area by the municipality of Selcuklu in Konya, Turkey. The rock in the quarry is primarily composed of micritic limestone which contains karstic cavities mainly controlled by joints. In order to assess the stability of the abandoned quarry, discontinuity survey, laboratory tests, kinematic and rock slope stability analyses were performed. Based on the analyses, planar and wedge failures as well as rockfall problems were identified. Possible remedial measures to be taken should consider the results of the analyses with existing project and environmental restrictions. © 2016 Associazione Geotecnica Italiana, Rome, Italy

MR spectroscopy of cervical spinal cord in patients with multiple sclerosis

WOS: 000224250800009PubMed: 15258708MR spectroscopy (MRS) of the brain in patients with multiple sclerosis has been well studied. However, in vivo MRS of the spinal cord in patients with MR spectroscopy has not been reported to our knowledge. We performed MRS of normal-appearing cervical spinal cords in multiple sclerosis patients and in healthy controls. N-acetyl aspartate was shown to be reduced within the cervical spinal cord of multiple sclerosis patients when compared with healthy controls. This finding supports axonal loss and damage within even normal-appearing spinal cords of multiple sclerosis patients

Erratum: MR spectroscopy of cervical spinal cord in patients with multiple sclerosis (Neuroradiology (2004) (s0023400412707) (10.1007/s00234-004-1231-1)

[No abstract available

Simple evaluation of liver size on erect abdominal plain radiography

WOS: 000225479800011PubMed: 15556597We aimed to develop criteria of hepatomegaly on erect plain radiography by comparing the results with those of ultrasonography. Right-sided longitudinal length and second lumbar vertebra ratio, of 22 cm and 6, respectively, detected hepatomegaly with over 90% accuracy, with higher success rates for the lumbar vertebral ratio. Corresponding values for normal size were 20 cm and 5. Sonography revealed high correlation with these results. We concluded that liver size measured on erect plain radiography was larger than but similar to that measured by sonography, and that right-sided longitudinal length and the lumbar vertebral. ratio are reliable criteria showing good correlation with the results of sonography

Medial orbital wall protrusion: Computed tomography findings

We report a case with a defect in the medial orbital wall, causing a protrusion of orbital contents into the ethmoidal cells. Both the coronal and axial computed tomography of the paranasal sinuses demonstrated the protrusion and focal wall defect properly. © 2004 Elsevier Ireland Ltd. All rights reserved

MRG ile normal görünümlü beyaz ve gri cevherde yaşlanmanin etkilerinin ADC degerleri ile saptanabilirligi.

PubMed: 15054694PURPOSE: To test if the apparent diffusion coefficient (ADC) values reflect the ultrastructural changes of normal appearing white and gray matter with advancing age. MATERIALS AND METHODS: We selected 45 patients with normal MRI and DW imaging findings. DW and MRI imaging was performed and for each patient the average ADC on trace images of the frontal and occipital white matter and the thalamus were compared with increasing patient age. RESULTS: The average ADC value was 0.753+/-0.054 x 10-3 mm2/sec in frontal white matter, 0.673+/-0.085 x 10-3 mm2/sec in occipital white matter, and 0.763+/-0.063 x 10-3 mm2/sec in the thalamus. For white matter, ADC values increased with advancing age. Although ADC tended to increase with age, comparison of individual thalamic ADC and patient ages did not reach statistical significance. CONCLUSION: Advancing age is associated with a small but statistically significant increase of water diffusibility in human white matter. This increase may reflect mild structural changes with normal aging

A material point/finite volume method for coupled shallow water flows and large dynamic deformations in seabeds

A hybrid material point/finite volume method for the numerical simulation of shallow water waves caused by large dynamic deformations in the bathymetry is presented. The proposed model consists of coupling the nonlinear shallow water equations for the water flow and a dynamic elastoplastic system for the seabed deformation. As a constitutive law, we consider a linear elastic-non-associative plastic model with the Drucker-Prager yield criterion allowing for large deformations under undrained cases. The transfer conditions between these models are achieved by using forces sampled from the hydraulic pressure and the friction terms along the interface between the seabed soil and shallow water. A detailed description regarding the coupled algorithm for the hybrid material point/finite volume method is presented. Several numerical examples are investigated to demonstrate the performance of the finite volume method for simulations of shallow water flow and the material point method for capturing the large deformation process of the solid phase. We also present numerical simulations of an undrained clay column collapse that induced shallow water waves and a dam-break problem to demonstrate the excellent performance of the proposed hybrid material point/finite volume method