Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Understanding Why Contrast Enhancement in Dynamic MRI Is Not Reproducible: Illustration with a Simple Phantom (2001)
    Boston, MA, USA : Blackwell Science Inc
    The @breast journal 7 (2001), S. 0 
    Details
    ISSN: 1524-4741
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: The goal of this work was to verify in a phantom study the necessity of a calibration method for comparison in dynamic contrast-enhanced magnetic resonance imaging (MRI) examinations. A perspex phantom with a dilution series of Gd-DTPA was used to measure the dynamic signal enhancement of a sequence. With nine MRI scanners from Bruker (0.23, 0.5, and 2 Tesla), Philips [0.5 and 1.5 Tesla (ACS-NT and S15)], and Siemens (0.2, 1.0, and 1.5 Tesla) one 2D FLASH and two 3D FLASH experiments were performed under identical measurement conditions. Under different measurement conditions (2D and 3D FLASH, TR, TE, FA) different characteristics in signal enhancement exist on a scanner. The same measurement conditions at different scanners (same magnetic field strength) also result in different signal enhancement. Dynamic contrast enhanced MRI examinations from different measurement conditions or scanners cannot be compared. To solve this problem a calibration is needed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1524-4741.2001.007003166.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Vascular complications (splenic and hepatic artery aneurysms) in the occipital horn syndrome: report of a patient and review of the literature (1999)
    Springer
    Pediatric radiology 29 (1999), S. 19-22 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report an 18-year-old boy with occipital horn syndrome who developed aneurysms of the splenic and hepatic arteries. Occipital horn syndrome, also called X-linked cutis laxa or Ehlers-Danlos syndrome (EDS) type IX, is characterised by a skeletal dysplasia which includes occipital horns, broad clavicles, deformed radii, ulnae and humeri, narrow rib cage, undercalcified long bones and coxa valga. Distinctive features common to all patients are unusual facial appearance, hypermobility of finger joints, limitation of extension of elbows, chronic diarrhoea and genitourinary abnormalities. In this case report we describe the difficulties encountered in the diagnostic management of patients with EDS-related vascular lesions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002470050526
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Büschelartiges Hämangiom (“tufted angioma”) des Unterarms Fallbericht und Literaturübersicht (2000)
    Springer
    Monatsschrift Kinderheilkunde 148 (2000), S. 832-836 
    Details
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Hämangiom ; Büschelartiges Hämangiom ; Diagnostik ; Therapie ; Keywords Haemangioma ; Tufted angioma ; Vascular lesion ; Diagnostic ; Therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Background: Tufted angioma represents a benign vascular lesion of the skin. The knowledge of this distinctive entity is important in distinction of clinically more aggressive and malignant neoplasms respectively. Case report. We report a 8-months-old girl who developed a deep seated tufted haemangioma on her right forearm. Sonography and MRI showed a good vascularized tumor with interseptal spreading. Histological examination of the incisional biopsy revealed a cellular capillary haemangioma with morphological features of rare tufted haemangioma. Discussion. Characteristic morphological features of tufted haemangioma allow accurate diagnosis and differential diagnosis to clinically more aggressive and malignant neoplasms of skin and soft tissues, wheras radiological methods are rather unspecific and do not distinguish reliably between these vascular lesions. It is of special clinical importance that tufted haemangioma represents an enlarging but biologically benign vascular neoplasm.
    Notes: Zusammenfassung Hintergrund: Das büschelartige Hämangiom (“tufted angioma”) ist ein benigner vaskulärer Tumor der Haut, dessen Kenntnis in der Differenzialdiagnose zu aggressiveren und malignen Tumoren wichtig ist. Fallbericht. Es wird über ein 8 Monate altes Mädchen mit diesem Tumor im Unterarmbereich berichtet. Sonographie und Magnetresonanztomographie zeigten einen gut vaskularisierten Weichgewebetumor, bei dem aufgrund interseptaler Ausbreitung ein maligner Prozess nicht ausgeschlossen werden konnte. Die Histologie der Inzisionsbiopsie ergab ein zellreiches kapillares Hämangiom, dessen morphologische Veränderungen eine Einordnung als ein seltenes büschelartiges Hämangiom erlaubten. Diskussion. Eine Abgrenzung des büschelartigen Hämangioms gegenüber aggressiveren und malignen vaskulären Läsionen der Haut ist aufgrund des typischen histologischen Bilds möglich, während eine Differenzierung mit Hilfe bildgebender Verfahren nicht gelingt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001120050651
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Challenging the anterior attentional system with a continuous performance task: a functional magnetic resonance imaging approach (1998)
    Springer
    European archives of psychiatry and clinical neuroscience 248 (1998), S. 161-170 
    Details
    ISSN: 1433-8491
    Keywords: Key words Continuous Performance Test ; Functional MRI ; Brain imaging ; Cognitive stimulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Combining the Continuous Performance Test (CPT) with a modern functional imaging technique provides a powerful tool for investigating neurophysiological processes in the human brain. There is increasing evidence from single photon emission tomography (SPECT), positron emission tomography (PET) and presently also functional magnetic resonance imaging (fMRI) studies proposing the existence of a distributed large-scale attentional network, mediated by the dorsolateral prefrontal and mesial frontal cortex, thalamus, basal ganglia and posterior parietal and superior temporal lobe. The aim of this study is to show that fMRI is a useful tool for in vivo localization of attentional tasks and to compare the results with established imaging techniques. Functional MRI was performed on a clinical 1.5-T system using gradient-echo acquisition. For data processing, the Statistical Parametric Mapping (SPM96) package was used. A right lateralized activation pattern in the dorsolateral prefrontal and mesial frontal cortex, the thalamus and the basal ganglia was found in a group of 12 male subjects. These findings support theories suggesting right hemispheric dominance of human attention.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004060050034
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...