Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
  • 2
    ISSN: 1432-1084
    Keywords: Key words: Magnetic resonance ; Brain ; Brain tumors ; Echo planar imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of this study was to assess the potential of high-speed interleaved echo-planar imaging (EPI) to achieve diagnostic image quality comparable to T2-weighted imaging in patients with brain tumors. Seventeen patients with intra-axial, supratentorial tumors (10 untreated gliomas, 7 radiated gliomas) were investigated on a 1.5-T scanner. The conventional scan (SE, TR/TE = 2200/80 ms, 18 slices) was acquired in 8 min, 4 s, and EPI (TR/TE = 3000/80 ms, 18 slices) was completed in 25 s. The films were compared in a blinded trail by three radiologists. On the general impression and anatomic display, both sequences were rated to be of similar quality. Artifacts were slightly more pronounced at the skull base and around surgical clips using EPI. Tumor delineation was nearly equivalent using EPI, compared with the T2-weighted sequence. Echo-planar imaging reached diagnostic quality in all patients. Interleaved high-resolution EPI yielded sufficient quality to depict intra-axial, supratentorial brain tumors. Since EPI can be obtained in a small fraction of the time needed for conventional spin echo, in addition to other indications it could be considered to study patients unable to cooperate.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-1084
    Keywords: MRI ; Safety
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract With the continuously growing number of MRI examinations and the enormous speed with which new technological developments are being implemented, patient monitoring and safety are becoming increasingly important issues, which MRI system producers and lawmakers have taken into consideration only to a limited extent. Therefore, institutions that operate MRI units have had to solve these problems on their own. For forensic reasons at least a monitoring concept should be developed with suitable equipment and careful documentation in every institution that operates an MRI unit. This article proposes how to plan and conduct adequate patient monitoring during MRI examinations.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-1084
    Keywords: Key words: Brain diseases ; Metabolic ; Infant ; Newborn ; MR imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. We report on a 2.5-year-old boy with severe mental retardation, choreoathetosis, dystonia, muscle rigidity, opisthotonus and severe hearing impairment. He had history of severe hyperbilirubinaemia immediately after birth presumably due to ABO incompatibility. The history and the clinical picture suggested the diagnosis of Kernicterus. The MR imaging examination upon admission revealed bilateral signal intensity increase in the globus pallidum on T2-weighted sequences. Additionally, our patient showed signal intensity changes within the subthalamic nuclei, which is known to be another characteristic area of bilirubin deposition in Kernicterus.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Dissektion ; Intramurales Hämatom ; Atherom ; Therapie ; Key words Dissection ; Intramural hematoma ; Atheroma ; Therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Improved methods of imaging the cerebral vascular system have increased the detection of traumatic or spontaneous dissection of the vertebral and carotid arteries. Especially MRI allows direct demonstration of intramural hematomas that are a sign of dissection of the vessel wall. We report on a patient who had an acute onset of dysarthria and monocular blurred vision, which recurred several times. Doppler ultrasound showed stenosis in both internal carotid arteries with reduced velocity of the flow; angiography confirmed the stenosis, showing a long stretch of stenosis (70%) of the right and a short stretch of stenosis (60%) of the left internal carotid arteries. MRI demonstrated a narrowing of the lumen by an intramural mass, whose signal characteristics were typical for blood. The MRI findings were thus consistent with the diagnosis of a spontaneous dissection of the carotid arteries. Since the Doppler ultrasound follow-up showed no change during the following 3 days, we interpreted the MRI findings as an indication of bleeding in an atheroma. The carotid disobliteration, performed first on the left side and later on the right side, confirmed this interpretation. Since stenosis due to a fissuring atheroma or bleeding in an atheroma requires different therapy than a dissection, it is thus important to consider the possible differential diagnosis in interpreting the MRI.
    Notes: Zusammenfassung Durch die Fortschritte in den bildgebenden Verfahren werden traumatische, bzw. spontane Dissektionen der A. carotis und der A. vertebralis zunehmend häufiger diagnostiziert. Insbesondere die Magnetresonanztomographie ermöglicht dabei einen direkten Nachweis von intramuralen Hämatomen als Zeichen der Dissektion. Wir berichten nun über einen Patienten, der akut beginnend und im Verlauf rezidivierend eine Dysarthrie sowie monokuläre Sehstörungen des linken Auges bemerkte. Dopplersonographisch fand sich beidseits, rechts betont, eine im Bulbus der A. carotis communis beginnende, bis in die A. carotis interna reichende Stenose, in der arteriellen digitalen Subtraktionsangiographie eine langstreckige etwa 70%ige A.-carotis-interna-Stenose rechts und eine kurzstreckige etwa 60%ige Stenose links. Diese Befunde ließen sowohl an eine ausgeprägte arteriosklerotische Makroangiopathie als auch an eine Dissektion denken. In der Kernspintomographie fand sich dann eine verdickte Gefäßwand der A. carotis interna beidseits mit einem schmalen Restlumen. Dieses wurde beidseits von in der T1w-Gewichtung mit selektiver Fettunterdrückung hyperintensivem Gewebe, am ehesten einem intramuralen Hämatom entsprechend, eingeengt. Dieser Befund ließ dann an eine beidseitige Dissektion der A. carotis interna denken. Auf Grund der in der Duplexsonographie über Tage unveränderten Befunde wurde das Bild dann als eine Einblutung in Wandatherome beidseits bei arteriosklerotischer Makroangiopathie gewertet und der Patient wegen der rezidivierenden, hämodynamisch bedingten Symptomatik operiert. Bei der zweizeitig durchgeführten Karotisdesobliteration beidseits bestätigte sich der Verdacht auf intramurale Atherome. Intramurale Atherome mit oder ohne Einblutung sind eine kernspintomographische Differentialdiagnose zu intramuralen Hämatomen bei Karotisdissektion.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Gliomatosis cerebri ; MRT-Diagnose ; Enzephalitis ; Key words Gliomatosis cerebri ; MRI ; Diagnosis ; Encephalitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The diagnosis of the rare disease Gliomatosis cerebri requires the correlation of clinical, radiological, and pathological findings. We report on two patients with intravitally diagnosed gliomatosis cerebri. Due to the unusually high malignancy of the tumor cells, diagnosis was complicated by atypical findings such as gadolinium enhancement in MRI and raised intracranial pressure. The clinical course, differential diagnosis, and literature are summarized briefly.
    Notes: Zusammenfassung Die Diagnose der seltenen Gliomatosis cerebri kann nur in Zusammenschau von klinischen, radiologischen und histopathologischen Befunden gestellt werden. Im vorliegenden Artikel berichten wir über 2 Patienten, bei denen intra vitam nach stereotaktischer Hirnbiopsie die Diagnose Gliomatosis cerebri gesichert wurde. Da in beiden Fällen für Gliomatosis cerebri ungewöhnlich hochgradig entdifferenzierte Tumorzellen vorlagen, wurde die Diagnosefindung durch atypische Befunde wie Kontrastmittelaufnahme im MRT und klinische Zeichen der intrakraniellen Drucksteigerung erschwert. Klinischer Verlauf, Differentialdiagnosen und Literatur werden kurz dargestellt.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Investigating the processes that led to the end of the last interglacial period is relevant for understanding how our ongoing interglacial will end, which has been a matter of much debate (see, for example, refs 1, 2). A recent ice core from Greenland demonstrates climate cooling from ...
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1432-1459
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...