BACKGROUND Magnetic resonance imaging (MRI) and fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) show promise for molecular cancer imaging. We evaluated 3T MRI, FDG PET/CT, and ultrasound images for asymptomatic women with an abnormal screening mammogram. METHODS The Institutional Review Board of Kaohsiung Veterans General Hospital (Kaohsiung, Taiwan) approved ...

BACKGROUND AND PURPOSE T2 mapping is useful for identifying and quantifying abnormalities of the hippocampus and amygdala. It is particularly useful in the presurgical evaluation of patients with temporal lobe epilepsy and for the identification of bilateral hippocampal sclerosis (HS). The purpose of this study was to implement and validate a dual-echo method for producing coronal T2 maps with ...

We shall show that the three variable cubic inequality t(a + b + c) + (t − 2t)(ab + bc + ca) ≥ (2t − 1)(ab + bc + ca) + (3t − 6t + 3t − 6t + 3)abc holds for non-negative a, b, c, and for any real number t. We also show some similar three variable cyclic quartic inequalities.

Introduction: β-amyloid plaques are thought to have an important role in the development and progression of Alzheimer’s disease (AD). Amyloid plaques are detectable at high-field as small hypointense regions in animal models [1] and ex vivo in human specimens [2], though in the latter case, clear separation of plaques from blood vessels remains an ongoing challenge. The underlying cause of the ...

BACKGROUND Myocardial T1, T2 and T2* imaging techniques become increasingly used in clinical practice. While normal values for T1, T2 and T2* times are well established for 1.5 Tesla (T) cardiovascular magnetic resonance (CMR), data for 3T remain scarce. Therefore we sought to determine normal reference values relative to gender and age and day to day reproducibility for native T1, T2, T2* mapp...

AIM To demonstrate feasibility of vessel wall imaging of the superficial palmar arch using high frequency micro-ultrasound, 7T and 3T magnetic resonance imaging (MRI). METHODS Four subjects (ages 22-50 years) were scanned on a micro-ultrasound system with a 45-MHz transducer (Vevo 2100, VisualSonics). Subjects' hands were then imaged on a 3T clinical MR scanner (Siemens Biograph MMR) using an...

Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disorder characterized by cortical and spinal motor neuron dysfunction. Routine magnetic resonance imaging (MRI) studies have previously shown hypointense signal in the motor cortex on T(2)-weighted images in some ALS patients, however, the cause of this finding is unknown. To investigate the utility of this MR signal change...

Introduction T1 mapping is a novel quantitative method for myocardial tissue characterization. Reference values of myocardium and blood have been established at 1.5T (Messroghli, MRM, 2007). CMR at 3T is a rapidly maturing field, and T1 values generally increase with magnetic field strength, making it necessary to establish new reference values at this higher field strength. The aim of this stu...

Introduction. The proliferation of 3T MRI scanners in the routine practice of neuroradiology has led to increasing appreciation for the advantages and disadvantages of high-field imaging, especially with the incorporation of advanced physiologic modalities such as perfusion, diffusion, and functional imaging into routine clinical protocols and the widespread adoption of parallel imaging techniq...