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  • Key words: Synchrotron – Iodine – Gadolinium – CT – Brain – Glioma  (1)
  • Liver anatomy  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 15 (1993), S. 21-29 
    ISSN: 1279-8517
    Keywords: Liver anatomy ; Large inferior right hepatic vein ; Magnetic resonance imaging ; Intraoperative ultrasonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les vv. hépatiques droites moyennes et inférieures sont très fréquentes voire constantes, mais le plus souvent de petit diamètre. L'existence d'une v. hépatique droite inférieure de grand diamètre, le plus souvent unique, entraine une variation dans le drainage veineux du lobe droit du foie. Les vv. hépatiques droites inférieures atteignant ou dépassant 0,5 cm de diamètre ont été recherchées sur 125 préparations anatomiques du foie : 70 pièces d'injection-corrosion, 32 foies embaumés au formol et sur des coupes du tronc frontales ou frontales-obliques effectuées chez 23 cadavres. La fréquence de ces veines a été estimée à 9 % sur les pièces d'injection-corrosion, 13 % sur les coupes et 16 % sur les foies embaumés au formol. Dans la littérature, la fréquence de ces veines varie de 10 % à 24 % selon la méthode employée pour les reconnaitre. naitre. Un balancement équilibré existe le plus souvent entre les vv. hépatiques droites supérieure et inférieure. Exceptionnellement la v. hépatique droite inférieure est prédominante par rapport à la v. hépatique droite supérieure. La situation d'une v. hépatique droite inférieure de grand diamètre est constante, à proximité de la face viscérale du foie. Le territoire qui lui est propre est le segment VI, mais il peut déborder un peu sur les segments voisins. En clinique, l'existence d'une v. hépatique droite inférieure de grand diamètre, reconnue par l'IRM et surtout repérée par l'échographie per-opératoire, permet de réaliser une hépatectomie sub-totale en ne conservant que le segment VI. Dans certaines circonstances pathologiques, grâce au développement des anastomoses entre les vv. hépatiques, une v. hépatique droite inférieure de grand diamètre peut contribuer à une suppléance circulatoire en direction de l'atrium droit.
    Notes: Summary The right middle and inferior hepatic vv. are very frequent, indeed constant, but usually of small caliber. The presence of an extra-wide right inferior hepatic v., usually solitary, produces a variation in the venous drainage of the right lobe of the liver. The right inferior hepatic vv. reaching or exceeding a caliber of 0.5 cm were investigated in 125 anatomic liver specimens: 70 injection-corrosion specimens, 32 formolised livers and frontal or frontal-oblique sections of the trunk made in 23 cadavers. The incidence of such vv. was estimated at 9% in the injection-corrosion specimens, 13% in the sections and 16% in the formolised livers. The incidence of these vv. in the literature varies from 10% to 24% according to the method used to demonstrate them. Usually, there is a balance between the right superior and inferior hepatic vv. Rarely, the right inferior hepatic v. predominates compared with the right superior hepatic v. The position of an extra-wide right inferior hepatic v. is constant, close to the visceral aspect of the liver. Its appropriate territory is segment VI, but it may encroach somewhat on adjacent segments. Clinically, the existence of an extra-wide right inferior hepatic v. as detected by MRI and, especially, located by intraoperative ultrasonography, allows performance of a subtotal hepatectomy leaving only segment VI. In certain pathologic conditions, thanks to the development of anastomoses between the hepatic vv., an extra-wide right inferior hepatic v. may contribute to a compensatory circulation towards the right atrium.
    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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