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  • Digitale Medien  (8)
  • Loseblatt
  • 1995-1999
  • 1985-1989  (8)
  • 1986  (8)
  • Magnetic resonance imaging
  • 1
    Digitale Medien
    Digitale Medien
    Magnetic resonance imaging of primary tumours and tumour-like lesions of bone (1986)
    Springer
    Skeletal radiology 15 (1986), S. 511-517 
    Details
    ISSN: 1432-2161
    Schlagwort(e): Magnetic resonance imaging ; Bone tumours ; Tumour-like lesions ; Musculoskeletal neoplasms ; Surgical staging
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The experience with magnetic resonance imaging (MRI) of 81 patients with primary bone tumours and tumour-like lesions is reported. MRI proved to be a sensitive method of detecting primary bone tumours. Intramedullary and extraosseous parts of bone tumours were, delineated better than by plain films and computed tomography (CT). Surgical clips and Harrington rods did not appreciably limit the estimation of tumour recurrence. MRI provided definite advantages compared to CT in the surgical staging of bone tumours and tumour-like lesions. MRI was found to be an imaging method with low specificity. Differentiation of tissue components, such as haematoma, fat, necrosis, and cystic areas, led to a specific diagnosis only in rare cases. Plain films and CT were found to be superior to MRI in assessing the biological activity and the differential diagnosis of bone tumours and tumour-like lesions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00361046
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  • 2
    Digitale Medien
    Digitale Medien
    Magnetic resonance imaging of avascular necrosis of the femoral head (1986)
    Springer
    Skeletal radiology 15 (1986), S. 133-140 
    Details
    ISSN: 1432-2161
    Schlagwort(e): Magnetic resonance imaging ; Osteonecrosis ; Bone disease, hip
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract This study investigates the role of magnetic resonance imaging (MR) in identifying avascular necrosis (AVN) of the femoral head and in monitoring its therapy. The detection of AVN, particularly in its early stages, is imperative to give therapeutic intervention the best opportunity for successful management. The results of magnetic resonance imaging are compared with those of the standard diagnostic modalities in evaluation of patients with the lesion. Examinations were performed at 0.12 T with a repetition time (TR) of 143 ms and times to echo (TE's) of 10 or 20 ms. This study represents a retrospective review of 90 hips which were examined in 45 consecutive patients. Of these, 52 hips were biopsied as part of treatment. MR was shown to be sensitive in the detection of AVN. Comparison of MR with radionuclide imaging showed comparable sensitivity and specificity. MR was also noted to be sensitive in the detection of early AVN. Preliminary results suggest that MR can monitor treatment of the affected hip, and may even be able to predict patient response to therapy. Although further work is necessary to determine the role of MR in the evaluation of the patient presenting with hip pain, MR is a sensitive method in detecting AVN and in monitoring its course in patients suspected of having the disease.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00350207
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  • 3
    Digitale Medien
    Digitale Medien
    Magnetic resonance imaging in acute tendon ruptures (1986)
    Springer
    Skeletal radiology 15 (1986), S. 619-621 
    Details
    ISSN: 1432-2161
    Schlagwort(e): Tendons ; Trauma ; Diagnosis ; Magnetic resonance imaging
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The diagnosis of acute tendon ruptures of the extensor mechanism of the knee or the Achilles tendon of the ankle may usually be made by clinical means. Massive soft tissue swelling accompanying these injuries often obscures the findings, however. Magnetic resonance imaging (MRI) can rapidly demonstrate these tendon ruptures. Examples of the use of MRI for quadriceps tendon, and Achilles tendon rupture are presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00349855
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  • 4
    Digitale Medien
    Digitale Medien
    MRI in acoustic neuroma: a review of 35 patients (1986)
    Springer
    Neuroradiology 28 (1986), S. 208-214 
    Details
    ISSN: 1432-1920
    Schlagwort(e): Magnetic resonance imaging ; Neuroma ; Neuroradiology ; Head ; Computed tomography
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary This retrospective study is aimed to assess the diagnostic efficacy of MRI in relation to contrast enhanced CT and air-CT-cisternography. MRI examinations were performed in 35 patients with suspected neurosensorial damage and suggestive of acoustic neuroma: 27 presented on MRI with unilateral tumors, 3 patients had a bilateral tumor and 5 patients were negative on all imaging modalities. The total number of acoustic neuromas detected was therefore 33. To date microscopic analysis has been performed on 12 tumors and histological data based on type Antoni A and Antoni B classification is available. Contrast enhanced CT detected 19 tumors, yielding an overall sensitivity rate of 58%. Air-CT cisternography identified an additional 5 tumors with a sensitivity rate of 100%. MRI identified 33 acoustic neuromas in 30 patients and was negative in 5 patients (sensitivity and accuracy 100%). Considering sensitivity in relation to location, MRI was much better than contrast enhanced CT for internal auditory canal (IAC) tumors (100% versus 36%) and better for cerebello-pontine angle tumors (CPA) tumors (100% versus 68%). The evolution of MRI technique, the various pulse sequences used and their actual selection is discussed. Seven patients received a paramagnetic contrast agent (Gadolinium-DTPA) with the additional benefit of a better demonstration of the tumor. The results suggest that MRI is the best non invasive technique for demonstrating acoustic neuromas.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00548194
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  • 5
    Digitale Medien
    Digitale Medien
    Magnetic resonance imaging of the child's brain (1986)
    Springer
    Child's nervous system 2 (1986), S. 115-120 
    Details
    ISSN: 1433-0350
    Schlagwort(e): Magnetic resonance imaging ; White matter ; Gray matter ; Congenital cerebrospinal anomalies ; Brain tumors ; Vascular abnormalities
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The most significant difference between magnetic resonance imaging (MRI) and computed tomography (CT) is that the former graphic representation of the cerebrospinal axis and its structures does not use ionizing radiation or the injection of contrast material. The physical principles of MRI and the very characteristic appearances of some pathological processes common in children require special study. Low-proton density areas are generally dark; the short T 1 value is responsible for white matter appearing clear; inversion recovery sequences permit study of the progression of myelination.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00270837
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  • 6
    Digitale Medien
    Digitale Medien
    Primary intracranial ependymoblastoma presenting as spinal cord compression due to metastasis (1986)
    Springer
    Child's nervous system 2 (1986), S. 323-325 
    Details
    ISSN: 1433-0350
    Schlagwort(e): Ependymoblastoma ; Ependymoma ; Extraneural metastases ; Spinal cord ; Magnetic resonance imaging ; Computed tomography
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract A primary intracranial ependymoblastoma presented only with symptoms of spinal cord compression due to metastatic spread of the tumor via the leptomeninges. Such a presentation is very rare among primary neoplasms of the central nervous system (CNS) and unique among the 12 previously reported ependymoblastomas. The previous cases all arose as primary brain tumors and several were remarkable for extensive leptomeningeal spread of the tumor. These observations and the presentation of our patient suggest that a histological diagnosis of ependymoblastoma of the spinal cord, with or without symptoms of intracranial tumor, should suggest that an intracranial primary lesion might be present.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00271949
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  • 7
    Digitale Medien
    Digitale Medien
    Superior sagittal sinus thrombosis: neuroradiological evaluation and clinical findings (1986)
    Springer
    Journal of neurology 233 (1986), S. 283-288 
    Details
    ISSN: 1432-1459
    Schlagwort(e): Sinus thrombosis ; Angiography ; Computed tomography ; Magnetic resonance imaging
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The spectrum of clinical signs in cases of superior sagittal sinus thrombosis includes not only focal neurological deficits, seizures and mental disturbances, but also symptoms which may lead to a diagnosis of pseudotumour cerebri (PTC). In 14 cases of angiographically (or autopsy) proven thrombosis of the superior sagittal or both lateral sinuses, the “empty triangle” sign on contrast CT examination was the most reliable sign, suggesting the diagnosis in 70%. Indirect CT signs (venous infarcts) were observed in all 8 patients with focal neurological signs, but appeared rather delayed in 3 cases. In contrast, patients with “benign” intracranial hypertension or PTC (6 cases) had normal unenhanced scans (4 cases) or showed slight diffuse brain oedema (2 cases). Magnetic resonance imaging was performed in 4 patients with findings suggestive of intravascular coagulation; however, due to the complexity of flow phenomena, further studies employing this new imaging technique will first have to be performed. Thus, angiography remains the best diagnostic tool and should not be delayed if there is a clinical suspicion of thrombosis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00314160
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  • 8
    Digitale Medien
    Digitale Medien
    Radiological and pathological findings in three cases of childhood pineocytomas (1986)
    Springer
    Child's nervous system 2 (1986), S. 297-300 
    Details
    ISSN: 1433-0350
    Schlagwort(e): Pineocytoma ; Magnetic resonance imaging ; Computed tomography ; Ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The radiological and pathological findings in three children with pineocytomas are described. The patients presented with symptoms and signs of increased intracranial pressure. CT scans demonstrated obstructive hydrocephalus, but failed to visualize pineal masses that were subsequently seen on MR scans. A suboccipital, supracerebellar approach was used to obtain tissue for histological diagnosis and, in one case, achieve a total removal. Light microscopy demonstrated typical pineocytomatous rosettes without evidence of gangliocytic or astrocytic differentiation. Electron microscopy revealed numerous dense core vesicles with synaptic ribbons, suggesting neurosecretory capability. These three cases demonstrate the diagnostic advantage of MR imaging for tumors in the pineal region as well as the relatively well-differentiated histopathological characteristics of pineocytomas.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00271942
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