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  • 1
    ISSN: 1279-8517
    Keywords: Larynx ; MRI ; Histology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The larynx is an organ with a complex anatomic structure. MRI allows the performance of sections in the three planes of space, so that this study of the soft parts of the larynx yields results superior to those of other imaging techniques. Together with laryngoscopy, MRI is most often used in assessing the extension of malignant laryngeal tumors. This assessment is fundamental in choosing the indications for surgery, but the published reports of MRI of the larynx are sometimes discordant. The visualization of certain important anatomic structures such as the conus elasticus is uncertain. Our aim was to study the MRI radio-anatomy of the larynx based on correlations between MRI and histologic sections. Eight anatomic specimens were studied four in the transverse plane, two in the sagittal plane, and two in the frontal plane. The MRI and histologic sections made at the same levels were compared. These comparisons allowed a description of the sectional radio-anatomy of the larynx and an assessment of the reliability and limitations of MRI. All the major anatomic structures could be identified. It was possible to demonstrate the conus elasticus. We were able to visualize the vocal process of the arytenoid cartilage, which has not to our knowledge been previously described in the literature.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1279-8517
    Keywords: Pseudocoarctation ; Left brachiocephalic vein ; Computed tomography ; Magnetic Resonance Imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs rapportent le cas d'un patient porteur d'une pseudocoarctation de l'aorte et d'une veine brachio-céphalique gauche rétro-aortique. L'association de ces deux anomalies congénitales, qui n'avait jamais été décrite auparavant, a été étudiée par aortographie, tomodensitométrie et imagerie par résonance magnétique.
    Notes: Summary The authors report a case of pseudocoarctation of the aorta associated with a retroaortic left brachiocephalic vein. This exceptional congenital malformation, never described before, was studied by aortography, computed tomography and magnetic resonance imaging.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 13 (1991), S. 213-220 
    ISSN: 1279-8517
    Keywords: Uterus ; Anatomy ; Nuclear Magnetic Resonance Imaging ; Contraception ; Menstrual cycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs décrivent l'anatomie zonale de l'utérus en Imagerie par Résonance Magnétique. L'aspect de l'utérus est différent en séquences pondérées en T1 et en T2; il est soumis à des variations de morphostructure et de signal en fonction de l'imprégnation hormonale. Vingt-sept IRM pelviennes ont été réalisées chez 16 femmes. Huit utilisaient des œstroprogestatifs comme moyen de contraception (groupe I) et ont eu une seule IRM. Six femmes étaient sans contraception (groupe II) et ont eu plusieurs IRM au cours du même cycle. Deux femmes étaient ménopausées (goupe III). Les résultats montrent des différences entre les dimensions utérines entre le groupe I et le groupe II, mais pas au sein du groupe II en fonction de la phase du cycle. La cavité endométriale est visible en séquences pondérées en T1 dans 40 % des cas ; en T2 elle est visible dans 100 % des cas ; elle est plus épaisse chez les femmes du groupe II pendant la seconde phase que chez celles des groupes I et III. Le signal du myomètre, comparé à celui de l'urine, augmente significativement entre les échos précoces et les échos tardifs des séquences pondérées en T2 chez les femmes du groupe I et chez celles du groupe II en seconde période du cycle, alors qu'il n'augmente pas ou diminue chez les femmes du groupe II en première période du cycle. La bande jonctionnelle n'est visible qu'en T2. Elle est plus épaisse dans le groupe II en seconde phase du cycle que dans le groupe II en première phase et que dans le groupe I. Elle n'est visible que chez une des deux femmes du groupe III. La connaissance de cette anatomie zonale et de ses variations de morphostructure et de signal en fonction de l'imprégnation hormonale est nécessaire en raison de l'important développement des indications de l'IRM en pathologie utérine et pelvienne.
    Notes: Summary Magnetic Resonance Imaging of the pelvis has lead to a new radioanatomical description of the uterus. Variations in the anatomical zones of the uterus were noted with different sequences used in MRI. There was also structural and signal variation depending on hormonal impregnation. Twenty seven MRIs of pelvices were carried out on 16 female volunteers. Eight of them were on œstroprogesterone as the method of contraception (Group I) and had a single MRI. Six were not taking contraceptives (Group II) and had different MRI's during the same cycle. Two women already had already gone through the menopause (Group III). Results showed differences in the size of the uterus (uterine height, length of the uterine body and cervix, diameter of the cervix) between groups I and II but no cyclic changes were observed within group II. The myometrium was found to be thicker in group I and in the luteal phase of group II females in comparison to the follicular phase in the same group. The endometrial cavity was seen in 40 % of cases on T1 weighted sequences; on T2 weighted sequences it was seen in all the cases. It was thicker during the second phase in group II than in group I and III. The myometrial signal compared to that of the bladder content (urine) showed a significant increase between early and late echoes on T2 weighted sequences in group I and during the second phase of the menstrual cycle in group II. No variations, or at times a decrease in signal, were observed during the first phase of the cycle in group II. The junctional zone was seen only on T2 weighted sequences. It was thicker in group II during the first phase of the cycle than in group II during the second phase and in group I. It was seen in only one of the two females of group III. The knowledge of this zonal anatomy and its structural and signal variations according to the hormonal state forms a necessary base for important developments in the imaging of uterine and pelvic pathology.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 12 (1990), S. 225-227 
    ISSN: 1279-8517
    Keywords: Venae cavae, abnormalities ; Azygos vein ; Computed tomography ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs rapportent un cas de veine cave inférieure gauche avec un drainage hémiazygos puis azygos préférentiel associé à un drainage accessoire par la veine intercostale supérieure gauche. Cette malformation congénitale exceptionnelle entrant dans le cadre d'un syndrome polysplénique a été étudiée par cavographie, tomodensitométrie et imagerie par résonance magnétique.
    Notes: Summary The authors report a case of left IVC with a preferential hemiazygos-azygos drainage associated with an accessory left superior intercostal vein drainage. This exceptional congenital malformation which finds its place in polysplenia was studied by cavography, CT and MR imaging.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1920
    Keywords: Meninges ; Neoplasia ; CT ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We describe an unusually extensive intracranial, skull base and cervical meningioma, whose clinical manifestations were minor; imaging revealed the true state of affairs and suggested the correct diagnosis.
    Type of Medium: Electronic Resource
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