Neuroimaging is becoming an increasingly important means of detecting changes in biochemical, microstructural and functional patterns occurring during rehabilitation. In magnetic resonance imaging (MRI), “advanced techniques”, such as functional MRI, relaxometry, diffusion tensor imaging and spectroscopy, are making it possible to investigate these changes in vivo, together with brain function....

PURPOSE Patients with mesial temporal lobe epilepsy (MTLE) without MRI abnormalities (MTLE-NL) represent a challenge for definition of underlying pathology and for presurgical evaluation. In a recent study we observed significant amygdala enlargement (AE) in 14% of MTLE patients with MRI signs of hippocampal sclerosis. Areas of gray matter volume (GMV) increase could represent structural abnorm...

Synopsis Magnitude-based parameter ᴀ밄tting is commonly used for relaxometry and multi-echo Dixon but introduces a bias for relaxation and fat fraction estimates, particularly for a low signal-to-noise ratio and high relaxation. The application of an automated, patchwise denoising to the multi-echo image series prior to parameter ᴀ밄tting, considerably increased the SNR; thus, reducing the bias a...

PURPOSE To demonstrate magnetic resonance imaging (MRI) findings of the focal sparing of iron and fat in liver tissue in patients with hepatic iron overload. MATERIALS AND METHODS We retrospectively reviewed 48 liver MRIs performed in patients with hemosiderosis from 2007-2009. We selected five (10%) of these patients based on the observation of focal signal abnormalities in the posterior asp...

本研究は、相対湿度11、33、40、50、75、95％で長期間の調湿を行った低熱ポルトランドセメントを用いたセメント硬化体において、水蒸気吸着試験および1H-NMR Relaxometryの測定により調湿条件による空隙構造の変化について検討した。水分量と比表面積は測定方法により値は大きく異なるものの乾燥による減少傾向がみられた。二つの測定方法による比表面積は、仮定している形が異なり、水蒸気吸着試験はC-S-Hの凝集構造の外側、1H-NMR RelaxometryではC-S-Hの全体構造をみているが、両者の比表面積の変化はどちらも乾燥によるC-S-Hの収縮に起因していると考えられる。