Introduction: Single-voxel proton MR spectroscopy (SV-H-MRS) of human skeletal muscle at ultra high fields provides accurate quantitation of muscular metabolite concentration due to improved spectral resolution and high signal to noise ratio. Quantitative evaluation of relaxation times is extremely important for accurately quantifying metabolite concentration, optimizing measurement protocols i...

diffusion weighted imaging uses the signal loss associated with the random thermal motion of water molecules in the presence of magnetic field gradients to derive a number of parameters that reflect the translational mobility of the water molecules in tissues. with a suitable experimental set-up, it is possible to calculate all the elements of the local diffusion tensor (dt) and derived paramet...

There is an increasing demand for high spatial and/or temporal resolution dynamic PET images in research and clinical settings. Such often have a low number of acquired counts per voxel, leading to poor signal-to-noise ratio, thus hampering quantitative accuracy precision image features. This can be obviated by bias-free postprocessing denoising algorithm improve while preserving feature accura...

Introduction: The PROPELLER family of sequences is characterized by low sensitivity to motion. In PROPELLER, k-space data are acquired in sets of parallel lines that form blades, and each blade is corrected for in-plane motion. Also, “quality” weights are assigned to blades during image reconstruction in order to reduce the effects of k-space errors and through-plane motion on the final image. ...

OBJECTIVES The aim of this study was to evaluate free-breathing single-shot real-time cine imaging for functional cardiac imaging at 3 T with increased spatial resolution. Special emphasis of this study was placed on the influence of parallel imaging techniques. MATERIALS AND METHODS Gradient echo phantom images were acquired with GRAPPA and modified SENSE reconstruction using both integrated...

Titanium (Ti) mesh plates are used as a bone replacement in brain tumor surgeries. In the case of radiotherapy, these plates might interfere with the beam path. The purpose of this study is to evaluate the effect of titanium mesh on the dose distribution of electron fields. Simulations were performed using Monte Carlo BEAMnrc and DOSXYZnrc codes for 6 and 10 MeV electron beams. In Monte Carlo s...

introduction: voxel based morphometry is a type of statistical parametric mapping that can be used to investigate the effect of diseases such as epilepsy, alzheimer's disease and parkinson's disease or other agent such as skills on brain structure (white matter, gray matter and cerebrospinal fluid). the aim of this study is evaluate the effectiveness of this method in detection of dif...

(Abstract) Diffusion Tensor Magnetic Resonance Imaging (DT-MRI), also known as Diffusion Tensor Imaging (DTI), is a unique medical imaging modality that provides non-invasive estimates of White Matter (WM) connectivity based on local principal directions of anisotropic water diffusion. DTI tractography estimates are a macroscopically sampled description of underlying microscopic structure, and ...

Boron neutron capture therapy (BNCT) is a radiotherapy that has mainly been used to treat malignant brain tumours, melanomas, and head and neck cancer. In BNCT, the patient receives an intravenous infusion of a B carrier, which accumulates in the tumour area. The tumour is irradiated with epithermal or thermal neutrons, which result in a boron neutron capture reaction B(n,α)Li. This generates h...