Journal of neuroimaging : official journal of the American Society of Neuroimaging
-
Review Case Reports
Chiasmatic-hypothalamic masses in adults: a case series and review of the literature.
Chiasmatic-hypothalamic masses are commonly seen in children with neurofibromatosis type 1 and often demonstrate a benign clinical course. These masses are, however, rare in adults and require tissue sampling for diagnosis. Here, we present four cases of chiasmatic-hypothalamic masses in adults with pathologically proven diagnoses. We also provide a review of the literature and propose a limited differential in this age group.
-
Randomized Controlled Trial Comparative Study
Relationship between Two Types of Coil Packing Densities Relative to Aneurysm Size.
Coil packing density (PD) can be calculated via a formula (PDF ) or software (PDS ). Two types of PD can be different from each other for same aneurysm. This study aimed to evaluate the interobserver agreement and relationships between the 2 types of PD relative to aneurysm size. ⋯ Interobserver agreement for PDF and PDS was excellent. However, PDF was overestimated in smaller aneurysms and converged to PDS as aneurysm size increased.
-
Case Reports Comparative Study
7T MRI-Histologic Correlation Study of Low Specific Absorption Rate T2-Weighted GRASE Sequences in the Detection of White Matter Involvement in Multiple Sclerosis.
The high value of the specific absorption rate (SAR) of radio-frequency (RF) energy arising from the series of RF refocusing pulses in T2-weighted (T2-w) turbo spin echo (TSE) MRI hampers its clinical application at 7.0 Tesla (7T). T2-w gradient and spin echo (GRASE) uses the speed from gradient refocusing in combination with the chemical-shift/static magnetic field (B0) inhomogeneity insensitivity from spin-echo refocusing to acquire T2-w images with a limited number of refocusing RF pulses, thus reducing SAR. ⋯ T2-w GRASE images may replace T2-w TSE for clinical use. However, even at 7T, both sequences fail in detecting and characterizing MS disease beyond visible WM-Ls.
-
We investigated the relationship between transcranial Doppler (TCD) pulsatility index (PI) and central aortic pressure by measurement of the aortic augmentation index (AIx). ⋯ TCD PI was significantly related with central aortic pressure, especially PP. The PI in the MCA and BA is closely associated with the pulsatile component of BP in the systemic circulation.
-
The aim of this study is to explore the possible changed cerebral white matter regions in patients with temporal lobe epilepsy (TLE) using diffusion tensor imaging (DTI) and tract-based spatial statistics (TBSS). ⋯ TLE is associated with widespread abnormalities in cerebral white matter tracts and these changes may have important clinical consequences.