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  • Articles: DFG German National Licenses  (3)
  • Arteries, extremities  (1)
  • Key words Aging • Breast  (1)
  • Key words: Anus  (1)
  • 1
    ISSN: 1432-1084
    Keywords: Arteries, extremities ; Arteries, laser angioplasty ; Arteries, transluminal angioplasty ; Lasers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We investigated a pulsed 504 nm dye laser at a pulse duration of 1.44 μ and a pulse rate of 10 Hz for its angioplasty capabilities. Laser energy was delivered via 9 F multi-fiber ring catheters. Our experimental data showed effective ablation of atheroma and disruption of calcified plaques at an energy fluence of 9.5 J/cm2 under saline and blood. Histologically, there was only minimal thermal injury to adjacent tissues. Irregular tissue borders after radiant energy exposure of 12.7 J/cm2, under blood, provide strong evidence for ablation by a shock-or pressure-wave mechanism. Percutaneous peripheral laser-assisted angioplasty was performed in 25 patients with arterial occlusive disease of the iliac and femoro-poplteal arteries (mean occlusion length 7.2 cm). All lesions were initially traversed by a guide-wire. Technical success was achieved in 24 out of 25 patients (96%). Laser angioplasty decreased the mean stenosis rate from 100% to 51± 12% (P 〈 0.01). The ankle-brachial index (ABI) rose from 0.48±0.16 before to 0.88±0.10 after intervention (P 〈 0.01) with a value of 0.82±0.15 at 6 months follow-up. The overall success rate, judged clinically and by ABI determinations in all patients, was 84% at a mean follow-up period of 7.9 months. The number of stand-alone laser procedure was 21%. Clinical application of the delivery devices proved to be safe due to the “over-the-wire” approach. Our prelimanary clinical data encourage further refinement of pulsed dye laser angioplasty for more efficacious debulking of atheroma.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 7 (1997), S. 1035-1042 
    ISSN: 1432-1084
    Keywords: Key words: Anus ; abnormalities ; Anus ; MR imaging ; Fistula ; anal ; Intestines ; MR imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of this study was to revisit anal anatomy, to explain surgical terminology in perianal complications of Crohn disease, and to show the MR imaging findings of perianal fistulas and abscesses. To this end more than 200 patients were studied using surface coils (Helmholtz; phased array) at 1.0 and 1.5 T. Transverse and coronal T1- and T2-weighted images were obtained. Parks' classification was used to describe perianal abscesses and fistulas. This pictorial essay shows the normal anal anatomy and pathologic findings such as subcutaneous, para-anal, ischiorectal, intersphincteric, and supralevatoric abscesses and fistulas. MR imaging with surface coils is well suited to showing the anal anatomy and to reliably describing perianal abscesses and fistulas according to surgical terminology.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Der Radiologe 37 (1997), S. 718-725 
    ISSN: 1432-2102
    Keywords: Key words Aging • Breast ; MR • Breast ; parenchymal pattern • Breast radiography • Menstruation ; Schlüsselwörter Alter • Magnetresonanzmammographie • Mamma ; Parenchymmuster • Mammographie • Menstruationszyklus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Alter und Menstruationszyklus stellen wichtige Einflußfaktoren auf die Mamma dar. Diese Tatsache ist klinisch lange bekannt und im Alltag des Gynäkologen wie Radiologen ständig präsent. Dagegen ist die Anzahl der Publikationen zu den Auswirkungen dieser Einflüsse auf die Bildgebung erstaunlich niedrig. Ziel dieser Arbeit ist es, die alters- und zyklusabhängigen Veränderungen der Mamma und deren klinische Relevanz für die Mammographie und MR-Mammographie darzustellen. Zu diesem Zweck werden aus einer eigenen Studie Daten der dynamischen MR-Tomographie zum Alters- und Zykluseinfluß auf das Mammaparenchym präsentiert. Darüber hinaus werden diese Einflußfaktoren mit mammographischen und MR-tomographischen Daten aus der Literatur korreliert. Dabei zeigt sich, daß sich aus den alters- und menstruationszyklusbedingten Veränderungen der Brust wichtige unmittelbare Implikationen für Durchführung und Befundung von konventioneller Mammographie und MR-Mammographie ergeben. Die Kenntnisse dieser Veränderungen sind darüber hinaus hilfreich für die Interpretation erhobener Befunde im Methodenvergleich. Schließlich ermöglichen die mittels bildgebender Verfahren gewonnenen Daten wichtige grundsätzliche Einblicke in die Physiologie und Pathophysiologie der Mamma in vivo.
    Notes: Summary Age and menstrual cycle have an important influence on the breast. This well-known fact is experienced in the daily routine of gynecologists and radiologists. The number of publications addressing the effect of these influences on imaging, however, is surprisingly low. The aim of this work is to describe the influences of age and menstrual cycle on the breast and to address their clinical relevance for mammography and MR mammography. Therefore, own data are presented concerning the age and menstrual cycle influences on breast parenchyma in dynamic MR mammography. Literature data are used to correlate mammography and MR imaging findings with these influences. The changes of the breast due to age and menstrual cycle have important direct implications on performing and reading conventional mammography and MR mammography. The knowledge of these changes is also helpful in the interpretation of findings when comparing different methods. Finally, the data gained by using imaging methods enable important basic insights into physiology and physiopathology of the breast in vivo.
    Type of Medium: Electronic Resource
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