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  • 1
    ISSN: 1279-8517
    Keywords: Angiography ; Technology ; Aortic arch
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé A partir d'une étude anatomique de 46 spécimens, les angles du tronc artériel brachio-céphalique droit et de l'artère sous-clavière gauche par rapport à la tangente à la crosse de l'aorte sont mesurés de façon à déterminer quelle voie permet l'accès le plus facile et le plus rapide à l'aorte descendante lors des angiographies des membres inférieurs en cas d'artériopathie sévère. L'étude montre que les angles moyens (77.1±16.0 degrés pour le tronc brachio-céphalique, 77.7±16.3 degrés pour l'artère sous-clavière gauche) ne sont pas significativement différents. Comme l'abord axillaire droit comporte plus de risques qui ne peuvent être contre-balancés que par un accès plus rapide, nous concluons que chez les patients de tous âges, le côté gauche droit être la voie d'accès de première intention.
    Notes: Summary In an anatomic study of 46 specimens, the angle of the brachiocephalic trunk and the left subclavian artery to the tangent of the aortic arch was measured in an effort to decide which route offers the quickest access to the descending aorta in lower extremity angiography for severe occlusive vascular diseases. The study shows that the average angles (77.1±16.0 degrees for the brachiocephalic trunk/77.7±16.3 degrees for the left subclavian artery) are not significantly different. Since the right axillary approach incurs other risks that could only be compensated by significantly quicker access, i.e. shorter maneuvering time in the aortic arch we conclude that in patients of all ages the left side should be the access route of choice.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0428
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 6 (1996), S. 606-606 
    ISSN: 1432-1084
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1084
    Keywords: Key words: Breast radiography ; Technology ; Breast neoplasms ; calcification ; Radiation dose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of our study was to evaluate a mammography unit capable of magnification of up to fourfold at an equivalent or lower dose than with current systems. A prototype mammography tube with an electron-beam-focusing technology resulting in a focal spot size of 40–120 μm was combined with a highly intensifying screen-film system. To evaluate contrast-detail resolution, phantom radiographs were performed with the prototype magnification mammography system using a magnification factor of 1.7 for survey views and a magnification factor of 4.0 for spot views. They were compared with unmagnified survey views and magnification spot views (magnification factor 1.9) of a state-of-the-art mammography system. The radiation exposure was measured and mean glandular doses were calculated. The contrast-detail resolution with both prototype (m = 1.7) and conventional (m = 1.1) survey views was equivalent while the entrance dose and the mean glandular dose were approximately 50 % lower with the prototype. For spot views, the contrast-detail resolution was substantially higher for the prototype than for conventional magnification while the dose was equivalent. Dose reduction and improved detail resolution are possible with this new technology.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1084
    Keywords: Iotrolan ; CT ; MR ; Arthrography ; Gd-DTPA ; Gleuchumeral joint
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The role of conventional arthrography versus computed tomography (CT) arthrography of the glenohumeral joint using iotrolan was evaluated in patients with different shoulder problems. In addition, a diagnostic combination of conventional and CT arthrography was compared with magnetic resonance (MR) arthrography of the glenohumeral joint. Two diagnostic protocols were used. Protocol 1: conventional followed after 30 min by CT arthrography of 37 joints using a double contrast technique with iotrolan 300. Protocol 2: conventional followed after 90–180 min by MR arthrography in 20 patients using a single-contrast technique with 10 ml iotrolan 300 and 1 ml gedopentetate dimeglumine 500 mM. Ten patients also underwent CT arthrography. Neither patient group experienced contrast-related complications. Image quality was good for all conventional arthrograms, excellent in 45/47 CT arthrograms and good in 20 MR arthrograms. CT and MR arthrography were diagnostically valuable in many patients. We conclude that glenohumeral joint evaluation should be perfomed first using conventional or CT arthrography. Iotrolan has proven to be highly reliable and safe in these applications. Iotrolan in combination with gadopentetate dimeglumine, permits MR arthrography following completion of the standard examinations if necessary.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1433-8726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A digital-projection radiography system with potential applications in genitourinary imaging is presented. The system replaces the traditional film-screen combinations by storage phosphor screens but continues to use cassettes in conventional X-ray equipment. Technical features such as consistently optimal image brightness and contrast across an extremely wide exposure range and edge-enhancement capabilities overcome deficiencies seen with conventional film-screen systems, such as improper exposure and poor contrast discrimination. Images obtained with a dual-energy radiation spectrum selectively demonstrate soft-tissue- or bone-equivalent structures and diminish the obscuring effect of bowel gas. Problems resulting from the singular reliance on film as a display and storage medium in conventional radiography are resolved in digital radiography by fast and simultaneous electronic access to images that can be displayed on high-resolution monitors or laser-printed films. The basic technical features of storage-phosphor digital imaging as compared to conventional radiography are described. A summary of recently published results relevant to genitourinary examinations is given and radiographic examples are presented.
    Type of Medium: Electronic Resource
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