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3D MPRAGE evaluation of lesions in the posterior cranial fossa

Standard spin-echo images of the posterior cranial fossa are usually impaired by pulsation artifacts. We evaluated a heavily T1 weighted MPRAGE sequence (TR/TE/α/TI=10/4/10-15°/200-350) for detection of intracerebral lesions in the posterior fossa in 11 patients. Overall quality of the MPRAGE images...

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Autori principali: Wenz, Frederik (Autore) , Heß, Thomas (Autore) , Knopp, Michael V. (Autore) , Weisser, Gerald (Autore) , Blüml, Stefan (Autore) , Schad, Lothar R. (Autore) , Hawighorst, Hans (Autore) , Kaick, Gerhard van (Autore)
Natura: Article (Journal)
Lingua:inglese
Pubblicazione: 1994
In: Magnetic resonance imaging
Year: 1994, Volume: 12, Fascicolo: 4, Pages: 553-558
ISSN:1873-5894
DOI:10.1016/0730-725X(94)92449-X
Accesso online:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/0730-725X(94)92449-X
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/0730725X9492449X
Testo
Note sull'autore:Frederik Wenz, Thomas Heß, Michael V. Knopp, Gerald Weisser, Stefan Blüml, Lothar R. Schad, Hans Hawighorst, Gerhard van Kaick

MARC

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520 |a Standard spin-echo images of the posterior cranial fossa are usually impaired by pulsation artifacts. We evaluated a heavily T1 weighted MPRAGE sequence (TR/TE/α/TI=10/4/10-15°/200-350) for detection of intracerebral lesions in the posterior fossa in 11 patients. Overall quality of the MPRAGE images was superior due to the lack of pulsation artifacts, high SN and excellent gray-white matter contrast. Lesion detection was better in one patient, equal in six and inferior in four patients compared to SE technique. A cerebellar metastasis (8 mm) in one patient was completely blurred from pulsation artifacts on the SE images. Whereas multiple small lesions (≤4 mm) with discrete contrast enhancement were missed on the MPRAGE images in three patients. We conclude, that the MPRAGE sequence yields high quality images with isotropic spatial resolution in a reasonable time. But MPRAGE with these parameters can not replace standard SE images in screening the posterior fossa, because of a decreased sensitivity in the detection of small contrast-enhancing lesions. 
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