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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 116 (1996), S. 106-107 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The prevalence of lumbar disc degeneration in subjects suffering from low-back pain (n = 207; age range 10–49 years) and in age-matched asymptomatic controls (n = 216) was investigated by magnetic resonance imaging. The percentage of subjects with degenerated discs increased with age; starting from the age of 15 years, this increase was more rapid in subjects with low-back pain. Concurrently, the number of degenerated discs was higher in the pain group than in controls. Lumbar disc degeneration manifests earlier and in a greater percentage of subjects with low-back pain than in asymptomatic controls.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 116 (1997), S. 106-107 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The prevalence of lumbar disc degeneration in subjects suffering from low-back pain (n = 207; age range 10–49 years) and in age-matched asymptomatic controls (n = 216) was investigated by magnetic resonance imaging. The percentage of subjects with degenerated discs increased with age; starting from the age of 15 years, this increase was more rapid in subjects with low-back pain. Concurrently, the number of degenerated discs was higher in the pain group than in controls. Lumbar disc degeneration manifests earlier and in a greater percentage of subjects with low-back pain than in asymptomatic controls.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0942-0940
    Keywords: MRI ; back muscle atrophy ; lumbar disc herniation ; microdiscectomy ; percutaneous nucleotomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We assessed in this study the potential development of postoperative muscle atrophy in the operation area in 39 patients treated by either microdiscectomy or percutaneous nucleotomy for lumbar disc herniation. The cross-sectional areas of the lumbar muscles were measured on magnetic resonance images created on the day preceding the operation and 6 months postoperatively. The cross-sections of the lumbar muscles remained unchanged during the observation period in all treated patients indicating that no muscle atrophy had developed in the operation area. Since peroperative tissue trauma may correlate with subsequent muscle denervation and atrophy, this finding may be due to the tissue sparing nature of microdiscectomy and percutaneous nucleotomy, thus encouraging the use of these techniques in the treatment of lumbar disc herniation.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1084
    Keywords: Key words: Brain – MR studies – Hydrocephalus – Cerebrospinal fluid – Flow dynamics – Ventriculoperitoneal shunts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The purpose of this study was to measure the cerebrospinal fluid (CSF) velocity and flow in the aqueduct in patients with wide ventricles with or without signs of normal pressure hydrocephalus (NPH) before and after shunt surgery. We studied 18 patients with wide ventricles with MRI and measured the CSF velocity values in the aqueducts. Twelve patients with the clinical triad of NPH were examined. Six patients were studied only before shunt surgery and 6 patients were studied both before and after shunt surgery. Three patients with wide ventricles without clinical triad of NPH, and 3 patients with hydrocephalus following subarachnoid hemorrhage were also examined. Seven NPH patients with hyperdynamic CSF flow and three NPH patients with normal CSF velocity and flow values showed a positive clinical response to shunt surgery. Two of the three patients with hydrocephalus and hyperdynamic CSF flow values in the aqueduct secondary to subarachnoid bleeding responded to shunt surgery. One patient with same disease and low CSF velocity and flow values did not respond. No change was detected in the CSF flow values of the aqueduct when measurements before and after shunt surgery were compared. Ventriculoperitoneal shunting does not change the CSF dynamics in the aqueduct.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-2102
    Keywords: Key words MRI • Kinematic MRI • Joint • Interventional ; Schlüsselwörter MRT • Kinematische MRT • Gelenk • Intervention
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die kürzlich eingeführten bildgebenden Systeme mit horizontal offener Konfiguration ermöglichen die Darstellung von Knie, Hüfte oder Schulter über den gesamten Bewegungsbereich, war bisher mit konventionellen MR-Systemen nicht möglich. Für genauere und reproduzierbare Untersuchungen können spezielle Gelenkbewegungsgeräte verwendet werden. Bei der Halswirbelsäule kann die funktionelle NMR-Darstellung im Hinblick auf die Beurteilung der Stabilität der Ligamenta alaria bei Patienten mit Spätfolgen eines Schleudertraumas und bei Patienten mit rheumatoider Arthritis von Nutzen sein, wenn klinisch eine zervikale Myelopathie oder superiore migration des Dens axis vermutet wird. Bei der Schulter kann eine Abduktionsstudie des vollen Bewegungsbereichs bei der Beurteilung eines Auftreffens des Tendo supraspinatus von Nutzen sein. Zur Beurteilung einer patellofemoralen Fehlstellung sollte der Quadrizeps belastet werden, da auf diese Weise die damit verbundene kontrahierende Muskulatur und verbundene Weichteilstrukturen beurteilt werden können. Die Lage des Caput femoris im Verhältnis zum Azetabulum in verschiedenen Stellungen kann beurteilt werden. Scanner mit offener Konfiguration ermöglichen während des Scannens Zugang zum Patienten und gestatten somit eine Überwachung von Interventionsverfahren durch MRT. Diese Interventionen umfassen die Aspirationszytologie/-biopsie sowie verschiedene Drainageverfahren.
    Notes: Summary The recently introduced horizontally open configuration imagers allow imaging of knee, hip or shoulder during whole range of motion, which is not possile in conventional MR imagers. Special joint motion devices can be used to provide accurate and reproducible studies. In cervical spine, functional MR imaging may be useful in evaluating alarligament stability in patients with late sequelae of a whiplash injury, and in patients with rheumatoid arthritis who are clinically suspected of having a cervical myelopathy or superior migration of the odontoid process. In shoulder, full range of motion abduction study may be helpful in assessing the supraspinatus tendon impingement. To evaluate patellofemoral malalignment, quadriceps loading is recommended since associated contracting muscles and related soft tissue structures can be evaluated. The position of the femoral head relative to the acetabulum during different positions can be assessed. Open-configuration scanners provide an access to patients during scanning procedure, and therefore permit interventional procedures to be monitored with MRI. Such interventions include aspiration cytology/biopsy and different drainage procedures.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European journal of applied physiology 65 (1992), S. 383-387 
    ISSN: 1439-6327
    Keywords: Muscle strength ; Trunk muscles ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A group of 12 sedentary medical students (1 man and 11 women aged 21–27 years) participated in a strength training programme for the trunk muscles lasting 18 weeks. The maximal isometric flexion and extension forces of the trunk muscles were measured before the training and at 18 weeks by dynamometer. The cross-sectional area of the back muscles, i.e. erector spinae, multifidus and psoas muscles, was measured from magnetic resonance images (spin echo sequence TR/TE 1500/80, slice thickness 10 mm) obtained at the L4–L5 disc level before the training, at 11 and 18 weeks. During training, no significant change in the body mass or body fat content was found. Muscle forces or muscle cross-sectional area were not related to body mass. There was a significant increase in both trunk muscle cross-sectional area (psoas muscle P〈0.001 and back muscles P〈0.01) and trunk muscle forces (flexion and extension forces P〈0.01) during the training but no direct association between the muscle cross-sectional area and strength of the flexors and extensors was detected before or after the training.
    Type of Medium: Electronic Resource
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