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  • 1
    Electronic Resource
    Electronic Resource
    MR arthrographic findings in tenosynovitis of the long bicipital tendon of the shoulder (1998)
    Springer
    Skeletal radiology 27 (1998), S. 7-12 
    Details
    ISSN: 1432-2161
    Keywords: Key words Shoulder ; MR studies ; Magnetic resonance (MR) arthrography ; Tendons ; MR studies ; Tendons ; inflammation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Purpose. To assess the MR arthrographic findings of bicipital tenosynovitis in correlation with arthroscopy. Design and patients. The shoulder MR arthrographies of 500 consecutive patients were retrospectively analyzed for signs of bicipital tenosynovitis and associated pathologies. Forty patients (8%) had MR evidence of bicipital tenosynovitis, but only 17 (3%) with arthroscopic confirmation were included in the study. The MR findings in these patients were compared with those of 10 patients with rotator cuff lesions but arthroscopically normal long biceps tendons. MR arthrography was performed with 10–15 ml of a 250 mmol/l gadoterate meglumine (Gd-DOTA) solution injected under fluoroscopic guidance, and transaxial, oblique coronal and sagittal MR sequences were obtained. Results. All 17 patients showed one or more abnormal findings: signal increase in the tendon with or without fusiform distension was seen in 12, surface irregularities in six, adhesions in 11 and noncommunicating effusions of the tendon sheath in six. Associated abnormalities of the rotator cuff were present in 16 while the seventeenth patient had glenohumeral synovitis without rotator cuff pathology. MR arthrograms correlated with arthroscopic findings in the joint but comparison was not possible in the intertubercular groove portion of the biceps tendon. None of the 10 patients with an arthroscopically normal biceps tendon showed any of the MR findings of bicipital tenosynovitis. Conclusion. Bicipital tenosynovitis is detectable by MR arthrography. In most cases it is an associated finding of rotator cuff abnormalities and likely to have a similar etiology. When lesions of the anterior rotator cuff are recognized, the biceps tendon should be scrutinized for inflammatory changes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002560050326
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Dynamic snapshot gradient-echo imaging of head and neck malignancies: time dependency and quality of contrast-to-noise ratio (1996)
    Springer
    Magnetic resonance materials in physics, biology and medicine 4 (1996), S. 61-69 
    Details
    ISSN: 1352-8661
    Keywords: head and neck neoplasms ; magnetic resonance (MR) diagnosis ; magnetic resonance (MR) contrast enhancement ; rapid imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics
    Notes: Abstract The purpose of this study was to evaluate the time dependency of the contrast-to-noise ratio (CNR) of head and neck malignancies during contrast-enhanced MR imaging. Then we would compare the CNR of dynamic snapshot gradient-echo (SGE) images with conventional spin-echo (SE) and fast spin-echo (FSE) sequences. Fifteen patients with squamous cell carcinomas were examined with T1W-SE, T2W-FSE, contrast-enhanced Gd-TlW-SE, and T1W-SGE sequences, the latter statically and contrast-enhanced dynamically. The CNR for all sequences and adjacent tissues was computed and the time to reach maximal CNR (Tmax) was determined for dynamic studies. The CNR was time dependent with two distinct Tmax at 6–18 and 60–160 s which corresponded to two different tumor enhancement patterns. Neither enhancement pattern correlated with distinct histologic findings or tumor grading. The CNR improved for the Gd-TlW-SGE images. The improvement was statistically significant in relation to T1W-SE and Gd-TlW-SE images at the floor of the mouth and at the tongue base. The good CNR of the dynamic Gd-TlW-SGE measurements justifies further investigations of this method in order to improve tumor delineation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01759781
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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