Journal of neuroimaging : official journal of the American Society of Neuroimaging
-
Whole brain atrophy is a putative outcome measure in monitoring relapsing-remitting multiple sclerosis (RRMS). With the ongoing MRI transformation from 1.5T to 3T, there is an unmet need to calibrate this change. We evaluated brain parenchymal volumes (BPVs) from 1.5T versus 3T in MS and normal controls (NC). ⋯ Field strength may impact whole brain volume measurements in patients with MS though the differences are not too divergent between 1.5T and 3T.
-
Headache after cerebral angiography is frequent but has received little attention. The purpose of this study was to evaluate the incidence and risk factors of headache after cerebral angiography. This study also addressed the predisposing factors that facilitate headache recovery. ⋯ The incidence of headache after DSA was 55.6%. Patients with a previous history of headaches, cerebrovascular disease, or a college education may have a higher risk of developing post-DSA headaches than do those without such history. Headache recovery may be associated with a patient history of diabetes or cerebrovascular disease.
-
The aim of this study was to investigate the characteristic pattern of age-related cortical thinning in patients with Down Syndrome (DS), as assessed by MRI and automatic cortical thickness measurements. ⋯ Our findings showed that Down Syndrome subjects are affected by a diffuse cortical thinning. The involvement of cortical structures can be observed at an earlier age than previous studies have reported.
-
This work studies the relationship between in-vitro Proton Magnetic Resonance Spectroscopy metabolite quantification and water T2 decay. ⋯ These results suggest that the shortening of T2 values should be taken into account when performing metabolite quantification. Also, the need of demonstrated similar results in in-vivo studies, since the presence of iron deposits or other factors affecting the water T2 decay measurements could explain part of the inter-subject variability in the metabolite concentration and ratio quantification.
-
The aim of this study is to compare gray matter (GM) volume and white matter (WM) integrity in Apolipoprotein E4 (ApoE ε4) carriers with that of ApoE ε4 noncarriers using the voxel-based morphometry and diffusion tensor imaging (DTI) to investigate the effect of the ApoE ε4 on brain structures in subjective memory impairment (SMI) without white matter hyperintensities (WMH). ⋯ Our findings suggest that the ApoE ε4 is associated with both atrophy of GM volume and disruption of WM integrity in SMI without WMH.