نتایج جستجو برای: mr spectroscopy

تعداد نتایج: 233085  

Journal: :AJNR. American journal of neuroradiology 2012
S L Bonifacio A Saporta H C Glass P Lee D V Glidden D M Ferriero A J Barkovich D Xu

BACKGROUND AND PURPOSE Therapeutic hypothermia has reduced morbidity and mortality and is associated with a lower burden of lesions on conventional imaging in NE. However, its effects on brain microstructure and metabolism have not been fully characterized. We hypothesized that therapeutic hypothermia improves measures of brain microstructure and metabolism. MATERIALS AND METHODS Forty-one ne...

Journal: :AJNR. American journal of neuroradiology 1997
S K Mukherji S Schiro M Castillo L Kwock K E Muller W Blackstock

PURPOSE To determine the ability of in vitro one-dimensional and two-dimensional proton MR spectroscopy to help differentiate squamous cell carcinoma of the extracranial head and neck from normal tissues and to correlate the in vitro observations with clinical studies. METHODS In vitro 1-D and 2-D correlated proton MR spectroscopy (11 T) was performed in tissue specimens of squamous cell carc...

Journal: :AJNR. American journal of neuroradiology 2001
G Sinson L J Bagley K M Cecil M Torchia J C McGowan R E Lenkinski T K McIntosh R I Grossman

BACKGROUND AND PURPOSE Current imaging does not permit quantification of neural injury after traumatic brain injury (TBI) and therefore limits both the development of new treatments and the appropriate counseling of patients concerning prognosis. We evaluated the utility of magnetization transfer ratio (MTR) and proton MR spectroscopy in identifying patients with neuronal injury after TBI. ME...

2012
Ji Soo Choi Hyeon-Man Baek Suhkmann Kim Min Jung Kim Ji Hyun Youk Hee Jung Moon Eun-Kyung Kim Kyung Hwa Han Dong-hyun Kim Seung Il Kim Ja Seung Koo

The purpose of this study was to examine the correlation between high-resolution magic angle spinning (HR-MAS) magnetic resonance (MR) spectroscopy using core needle biopsy (CNB) specimens and histologic prognostic factors currently used in breast cancer patients. After institutional review board approval and informed consent were obtained for this study, CNB specimens were collected from 36 ma...

Journal: :AJNR. American journal of neuroradiology 2006
J-h Kim K-H Chang D G Na I C Song B J Kwon M H Han K Kim

BACKGROUND AND PURPOSE Echo time (TE) can have a large influence on the spectra in proton MR spectroscopy ((1)H-MR spectroscopy). The purpose of this study was to comparatively assess the diagnostic value of 3T single-voxel (1)H-MR spectroscopy with short or intermediate TEs in grading cerebral gliomas. METHODS Single voxel (1)H-MR spectroscopy was performed at 3T in 35 patients with cerebral...

Journal: :AJNR. American journal of neuroradiology 2010
E Kapsalaki K N Fountas

We read with great interest the article by Pal et al. The authors reported on their experience with the application of proton MR (HMR) spectroscopy in the imaging evaluation of patients harboring intracranial abscess. In their retrospective study, they examined 194 patient charts and imaging studies, and they concluded that the detection of cytosolic amino acids is a strong indication of an abs...

Journal: :AJNR. American journal of neuroradiology 2003
R Nuri Sener

We herein report the case of a 53-year-old woman with Behcet's disease and an acute T2-hyperintense lesion in left side of the pons. Echo-planar "trace" diffusion MR imaging revealed high signal intensity changes at the lesion site on b = 1000 s/mm(2) images, initially suggesting restricted diffusion. On corresponding apparent diffusion coefficient maps, however, the lesion had high signal inte...

Journal: :AJNR. American journal of neuroradiology 2000
L Farina A Bizzi G Finocchiaro D Pareyson A Sghirlanzoni B Bertagnolio M Savoiardo S Naidu B S Singhal D A Wenger

We present the MR imaging findings in four patients (two pairs of siblings from two unrelated families) with adult Krabbe disease. In the first family, clinical presentation mimicked familial spastic paraplegia. Their MR images showed selective, increased signal intensity on T2-weighted sequences along the corticospinal tracts, most prominently in the proband and barely detectable in her brothe...

Journal: :AJNR. American journal of neuroradiology 2014
H Fudaba T Shimomura T Abe H Matsuta Y Momii K Sugita H Ooba T Kamida T Hikawa M Fujiki

BACKGROUND AND PURPOSE Pulsed arterial spin-labeling, DTI, and MR spectroscopy provide useful data for tumor evaluation. We evaluated multiple parameters by using these pulse sequences and the Ki-67 labeling index in newly diagnosed supratentorial gliomas. MATERIALS AND METHODS All 32 patients, with grade II (3 each of diffuse astrocytoma, oligodendroglioma, and oligoastrocytoma), grade III (...

2013
Siegfried Hélage Samir Benadjaoud Jérôme Hodel Sophie Gerber Marc Zins

Aims: To report a rare clinical case of gliomatosis cerebri, which presented with nonspecific clinical, laboratory, and radiological findings. We provide images and stress the importance of differential diagnosis based on imaging, especially magnetic resonance (MR) spectroscopy. Case Presentation: A 73-year-old woman developed a right hemiplegia suggestive of ischemic stroke. Cerebral magnetic ...

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