Longstanding tectal tumors: proton MR spectroscopy and diffusion MRI findings
Küçük Resim Yok
Tarih
2002
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Four patients with longstanding tectal tumors are included in this study. The tectal lesion in a neurofibromatosis type 1 (NF1) patient was due to a hamartoma, while others represented gliomas. On spectroscopy, decreased NAA peaks with resultant decreases in the NAA/Cho, and NAA/Cr ratios were observed in two patients. In three patients, on diffusion MRI the tectal tumors were hyperintense on b=1000 s/mm(2) (heavily diffusion-weighted) images. On apparent diffusion coefficient (ADC) maps, they had high signal, and high ADC values (mean = 1.20 x 10(-3) mm(2)/s), compared to normal cerebral parenchyma. Diffusion MRI findings suggested that tectal tumors had a relatively high nuclear to cytoplasmic ratio (high-signal on b=1000 s/mm(2) images) in association with a relatively loose intercellular matrix (high ADC values). (C) 2002 Elsevier Science Ltd. All rights reserved.
Açıklama
Anahtar Kelimeler
tectal tumor, proton MR spectroscopy, diffusion MRI
Kaynak
Computerized Medical Imaging and Graphics
WoS Q Değeri
Q4
Scopus Q Değeri
N/A
Cilt
26
Sayı
1
