[How Useful is Brain MRI for Early Diagnosis of Alzheimer's Disease?].

MR imaging is often used in assessing patients with dementia, including Alzheimer's disease. Assessment is done through quantitative imaging analysis in addition to visual assessment using structural MRI. Advanced MRI techniques, such as diffusion MRI, functional MRI, arterial spin labeling (ASL), and MR spectroscopy, are also potential imaging biomarkers.

Whole-tumor histogram analysis of DWI and QSI for differentiating between meningioma and schwannoma: a pilot study.

Purpose: To investigate whether whole-tumor histogram analyses of diffusivity measurements derived from q-space imaging (QSI) improves the differentiation between meningioma and schwannoma.

Materials And Methods: Fifteen extra-axial tumors (11 meningiomas and 4 schwannomas) with MR examinations from April 2011 to May 2013 were included. Three-dimensional regions of interest (ROI) encompassed the whole tumor, including cystic areas.

Can we shorten the q-space imaging to make it clinically feasible?

Purpose: Q-space imaging (QSI) is a novel magnetic resonance imaging (MRI) technique that enables assessment of micro-structural changes of white matter. The acquisition time, however, is comparatively long to use for routine clinical assessment. Therefore, the present study investigated the clinically feasible b value combinations to measure the water molecular displacement probability density function (PDF) in healthy subjects.