The aim of our study is to characterize the venous vasculatures of hepatocellular carcinoma (HCC) using a multi-breath-hold two-dimensional (2D) susceptibility weighted imaging (SWI) in comparison with conventional Magnetic Resonance Imaging (MRI) sequences. Twenty-nine patients with pathologically confirmed HCC underwent MR examination at a 3.0 T scanner. The number of venous vascularity in or...

OBJECTIVE To analyze diffusion tensor imaging (DTI) data in the substantia nigra (SN) using a more consistent region of interest (ROI) defined by neuromelanin-sensitive MRI in order to assess Parkinson's disease (PD) related changes in diffusion characteristics in the SN. METHODS T1 -weighted and DTI data were obtained in a cohort of 37 subjects (17 control subjects and 20 subjects with PD). ...

PURPOSE To minimize feature loss in T1- and T2-weighted MRI by merging multiple MR images acquired at different TR and TE to generate an image with increased dynamic range. MATERIALS AND METHODS High Dynamic Range (HDR) processing techniques from the field of photography were applied to a series of acquired MR images. Specifically, a method to parameterize the algorithm for MRI data was devel...

An image of increased signal intensity on T2-weighted images in the central area globus pallidus (caused by necrosis and edema) surrounded a zone reduced (representing iron deposits) brain magnetic resonance is called eye tiger sign.

Background/introduction T2 signal intensity and perfusion MR findings are known to be important influencing factors for therapeutic response of uterine fibroids to MR-guided high-intensity focused ultrasound (MR-HIFU) ablation. While T2 signal intensity of fibroids is easy to assess, perfusion MRI is relatively difficult to perform. The aim of this study was to evaluate relationships between T2...

Osteosarcomas are especially rare in the mandible and maxilla, representing 1.6% of all bony malignant tumours. In this article, we described a case of osteosarcoma of the mandible. Computed tomography (CT) image showed a well-circumscribed homogeneous mass, with nonhomogeneous contrast enhancement. T1-weighted magnetic resonance imaging (MR) image showed intermediate signal intensity on, and a...

Introduction T2*-weighted gradient echo (GE) images show a good contrast in iron-rich structures like the subthalamic nuclei (STN) due to microscopic susceptibility induced field gradients with the additional advantage of low specific absorption rate (SAR) exposure [1]. They are therefore useful in Parkinson disease treatment, providing landmarks for exact placement of stimulation electrodes [2...

BACKGROUND AND PURPOSE Determining the diagnostic accuracy of different MR sequences is essential to design MR imaging protocols. The purpose of the study was to compare 3T sagittal FSE T2, STIR, and T1-weighted phase-sensitive inversion recovery in the detection of spinal cord lesions in patients with suspected or definite MS. MATERIALS AND METHODS We performed a retrospective analysis of 38...

772 Fig. 1(a). Preoperative X-ray knee anteroposterior view showing stippled calcification in loose bodies (arrow). 1(b). Preoperative X-ray knee lateral view showing stippled calcification in loose bodies (arrow). Fig. 2(a). Preoperative MRI scan T1 weighted image (sagittal cut) showing low to intermediate signal nodular mass (arrow). (b). Preoperative MRI scan T2 weighted image (sagittal cut)...

background: intervertebral disc herniation has two common types, extrusion and protrusion, which may affect the adjacent vertebrae.in addition, it is associated with significant signal changes in t1 mri (short tr/te) and t2 mri (long tr/te).   methods: the present study is a cross-sectional analytic one, in which sampling was performed retrospectively. cases were randomly selected from the pati...