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  • 1
    Online Resource
    Online Resource
    Berlin, Heidelberg : Springer-Verlag Berlin Heidelberg
    Keywords: Angiography ; Radiology, Medical
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource
    ISBN: 9783540401483
    Language: English
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  • 2
    Online Resource
    Online Resource
    Milano : Springer
    Keywords: Medizin ; Medicine ; Oncology ; Radiology, Medical
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource , Illustrationen, Diagramme
    ISBN: 9788847010673
    URL: Volltext  (URL des Erstveröffentlichers)
    Language: Italian
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    ISSN: 1352-8661
    Keywords: MRI ; techniques ; joints (disease) ; extremities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics
    Notes: Abstract Magnetic resonance imaging (MRI) has a significative impact on diagnosis of musculoskeletal diseases. At present, joint diseases are evaluated with total-body systems, this fact representing an obstacle to MR diffusion in the osteoarticular field. The last technological advances have allowed the development of a cost-effective, compact and easy-to-install MR system. The system is constituted by a 0.2-T permanent unit, weighing 800 kg. The unit is used only for limb examination. To verify the diagnostic accuracy of the new system a study based on 1902 lower limb examinations was carried out between October 1992 and February 1994. Of these patients, 301 underwent surgery during which the MR findings were verified. Quite satisfying overall results were obtained, particularly in case of knee trauma, comparable to those provided by total body units with higher magnetic field. It must be noted, however, that in 3% of the investigated knee diseases, the examinations could not be performed due to technical limitations related to the magnet size. The authors believe that the limited field of view (11 cm) does not allows accurate staging of the malignant lesions concerning soft tissue and bone, which require a wider loco-regional staging. They also believe that the particular structure of the magnet allows for a comfortable management of pediatric, elderly, and acute patients.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    ISSN: 1573-0743
    Keywords: coronary by-pass grafts ; Magnetic Resonance Imaging (MRI)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In order to test MRI ability to detect the number and the sites of coronary artery by-pass grafts (CABGs), 22 patients with CABGs were studied. The detection of a neo-vessel in even one of the examination slices was considered as positive for the study, disregarding the difference between its origin and course. With such a criterion, MRI total percentage of vascular bridges identification resulted in 76.1% (51/67) with very low values for CABGs implanted on diagonal, obtuse marginal and posterior descending vessels (11/24=45.8%). These results lead to the conclusion that, although MRI has some advantages in the identification of CABGs implanted on the main coronary vessels in the early post-operative period, its extensive use cannot be proposed at the present state of the art.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 1 (1991), S. 124-130 
    ISSN: 1432-1084
    Keywords: Pancreas, neoplasm ; Pancreas, MRI ; Pancreas, neoplasm, MRI ; MRI sequences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The authors have used MRI for investigation of 41 patients with pancreatic tumours. MR examinations were performed with 0.5 T superconductive equipment. Short TR, short TE spin echo (SE) sequences were obtained with 8 averages and 256×256 matrix. T2-weighted sequences were also acquired. T1-weighted SE sequences provided more detail, with high intrinsic contrast between the tumour and the normal pancreas; small lesions (19 smaller than 3 cm in diameter) were always detected on these images. T2-weighted SE sequences were not useful for lesion detection, due to the lower intrinsic contrast and the number of artefacts. T2-weighted sequences proved helpful for lesion characterisation in two cases of cystoadenocarcinoma only. Staging of the tumour was possible with MRI, with good assessment of local spread, lymphoadenopathy, vascular involvement and hepatic metastases. MRI of the pancreas at medium field strength can be an alternative to CT in selected cases.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Abdominal imaging 1 (1976), S. 225-227 
    ISSN: 1432-0509
    Keywords: Portal hypertension ; Portal thrombosis ; Celiac arteriography ; Postsplenectomy thrombosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The authors report the incidence of portal thrombosis in their experience, of patients who have been operated on for splenectomy as treatment for portal hypertension with splenomegaly and hypersplenism without a portal systemic shunt. In 161 patients studied angiographically for portal hypertension due to cirrhosis, portal thrombosis was shown in 19 patients. Of these 19 patients 13 were previously splenectomized. Only 6 were never operated upon.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 2 (1992), S. 342-345 
    ISSN: 1432-1084
    Keywords: Liver, MRI studies ; Pancreas, MRI studies ; MR contrast agents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The authors describe the results obtained with dynamic MRI of the parenchymal organs during the infusion of contrast agents. Thirteen patients with hepatic and pancreatic lesions were studied. RASE sequences were characterized by TR of 260 ms, TE of 16 ms, NEX 1, matrix 128 × 256. Infusion of the contrast agent started 15 s prior to the beginning of the pulse sequence and continued throughout the pulse sequence (25 s). In this way, a continuous inflow of contrast agent in abdominal organs was expected during the acquisition time. The conventional dose of Gd-DTPA was employed (0.1 mmol/kg). The results demonstrate a highly relevant pancreatic enhancement in the early arterial phase of perfusion, with values of SE/N of 18.1 versus 8.5 in the subsequent sequence. However, in the liver the perfusion study did not improve the parenchymal enhancement, with values of 9.3 versus 15.3 in the late phase. There was no improvement of hypontense lesion detections in the liver, while the hypervascular lesions were visualized with a high signal intensity in the early perfusion study, disappearing in the later sequences.
    Type of Medium: Electronic Resource
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