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  • 1
    ISSN: 1432-1920
    Schlagwort(e): Key words Magnetic resonance imaging ; Multiple sclerosis ; Pulse sequences ; Lesion load
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Changes on serial assessments of brain MRI lesion load are used for monitoring therapeutic efficacy in patients with multiple sclerosis (MS). We assessed the accuracy and reliability of conventional spin-echo (CSE) and fast spin-echo (FSE) sequences for measurement of lesion volume using a semiautomated contour technique. Cranial CSE and FSE examinations of 18 patients with secondary progressive MS were studied. The mean lesion load was slightly higher with the CSE sequence (p = 0.002). Intraobserver variability was significantly higher for FSE than for CSE, according to both the coefficient of variation between two measurements (mean 2.48 % and 1.35 % respectively, p 〈 0.05) and back-transformed 95 % limits of agreement (1.005–1.060 for FSE; 0.988–1.019 for CSE). Although FSE sequences are quicker and the total lesion volume measurements are similar to those obtained with CSE, the poorer reproducibility raises doubts about the use of FSE to replace CSE in clinical trials.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Neurological sciences 17 (1996), S. 385-391 
    ISSN: 1590-3478
    Schlagwort(e): Multiple Sclerosis ; Magnetic Resonance ; Clinical Trials ; Natural History
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Sommario In questo articolo vengono presi in esame i principali contributi che le tecniche di risonanza magnetica (RM) forniscono per il monitoraggio del decorso della sclerosi multipla (SM), sia esso naturale o modificato da interventi terapeutici. Le correlazioni riscontrate tra parametri di RM ed attività a breve termine della malattia rendono appropriato l'uso di tali misure come end-point primari in trial di fase II volti ad esplorare la efficacia di nuovi trattamenti. Le correlazioni tra parametri di RM ed evoluzione clinica a lungo termine sono invece modeste nelle forme clinicamente definite di malattia e pertanto tali misure sono attualmente utilizzate esclusivamente come end-point secondari nei trial di fase III. In questo articolo vengono inoltre presentati i risultati ottenuti dall'applicazione clinica di nuove tecniche non convenzionali di RM, nonché il loro possibile ruolo futuro nel monitorare l'efficacia dei trattamenti volti a prevenire lo sviluppo di disabilità in pazienti con SM.
    Notizen: Abstract In this review the main contributions of magnetic resonance (MR) techniques in the monitoring of multiple sclerosis (MS) course, both natural or modified by treatments, are presented. MR measures well correlate with short-term disease evolution and therefore their use is appropriate as primary end-points in preliminary clinical trials evaluating the effects of new treatments. In contrast, the correlation between MR measures and long-term clinical evolution in clinically definite MS is less clear, thus indicating that such measures can be used at present only as a secondary end-point in large scale definitive trials. The results coming from the clinical application of newer MR techniques with higher pathological specificity are also presented and their possible future roles in monitoring treatment aimed at preventing development of disability in MS are discussed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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