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  • Helical CT  (1)
  • Key words: Synchrotron – Iodine – Gadolinium – CT – Brain – Glioma  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 17 (1995), S. 319-324 
    ISSN: 1279-8517
    Keywords: Retroperitoneum ; Oblique section ; Helical CT ; MRI ; Topographic anatomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs proposent une méthode de coupes obliques du rétropéritoine adaptées à la morphologie de chaque individu. En effet, la disposition des viscères rétropéritonéaux, comme celle du foie, varie d'un patient à l'autre en fonction de son morphotype. Cette méthode originale comporte deux incidences destinées à l'étude séparée du rétropéritoine gauche et droit. Il s'agit de deux plans de coupe verticaux, articulés par un axe qui se superpose à celui de la veine porte. Les auteurs supposent que l'orientation des viscères au sein du rétropéritoine dépend du développement du foie, ainsi ces incidences sont choisies grâce à un repérage en coupes axiales de la veine hépatique moyenne et de la bifurcation portale, deux témoins vasculaires de la morphologie du foie. Ces plans de coupe ont fait l'objet d'une étude anatomique puis radiologique qui confirme la fiabilité de ces repères et leur facilité d'application à l'imagerie moderne. Les images obtenues complètent l'Anatomie Topographique classique du rétropéritoine. Ces coupes obliques facilitent l'exploration radiologique des vaisseaux portaux et systémiques, des pédicules rénaux, des glandes surrénales et du pancréas.
    Notes: Summary The authors present oblique sections of the retroperitoneum adapted to the morphology of each patient, which affects both the liver and the organisation of the retroperitoneum. This original method involve two incidences for studying the left and right retroperitoneum separately with vertical sectional planes. The authors postulate that the orientation of the retroperitoneal viscera depends on the degree of hepatic development, so these incidences are chosen with reference to axial sections of the portal bifurcation and the middle hepatic v.: the two vascular landmarks of the liver. Anatomic and radiologic studies confirm the reliability of these landmarks and their easy application in modern imaging. Such new data improve our understanding of the classical topographic anatomy of the retroperitoneum. These oblique sections promote the radiologic study of the portal and systemic vessels, renal pedicles, suprarenal glands and pancreas.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1084
    Keywords: Key words: Synchrotron – Iodine – Gadolinium – CT – Brain – Glioma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The purpose of this work was to demonstrate the feasibility of a new imaging technique called synchrotron radiation computed tomography (SRCT). This technique leads to a direct assessment of the in vivo concentration of an iodine- or gadolinium-labeled compound. Rats bearing C6 glioma were imaged by MRI prior to the SRCT experiment. The SRCT experiments were performed after a 1.3 g I/kg (n = 5) or a 0.4 g Gd/kg (n = 5) injection. Finally, brains were sampled for histology. The SRCT images exhibited contrast enhancement at the tumor location. Ten minutes after injection, iodine and gadolinium tissular concentrations were equal to 0.80 ( ± 0.40) mg/cm3 and 0.50 ( ± 0.10) mg/cm3, respectively in the peripheral area of the tumor (respective background value: 0.20 ± 0.02 to 0.10 ± 0.01). Correlation to MRI and histology revealed that the contrast uptake occurred in the most vascularized area of the tumor. The present study summarizes the feasibility of in vivo SRCT to obtain quantitative information about iodine and gadolinium-labeled compounds. Beyond brain tumor pathology, the SRCT appears as a complementary approach to MRI and CT, for studying iodine- and gadolinium-labeled compounds by the direct achievement of the tissular concentration value in the tissue.
    Type of Medium: Electronic Resource
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