Purpose: Diffusion-weighted Imaging (DWI) using readout-segmented EPI (rs-EPI) with 2D navigator correction [1] is an alternative to standard single-shot EPI (ss-EPI) that improves image quality by reducing susceptibility artifacts and allowing a higher spatial resolution. This improved image quality raises the possibility that the low b-value image could be used to replace a separate T2-weight...

PURPOSE To prospectively evaluate the ability of diffusion-weighted (DW) magnetic resonance (MR) imaging to be used to determine the T stage of bladder cancer and to measure the correlation between the apparent diffusion coefficient (ADC) and histologic grade. MATERIALS AND METHODS This study was approved by the local institutional review board. All patients gave written informed consent. For...

K. Takeo, A. Ishikawa, M. Okazaki, S. Kohno, K. Shimizu SHIMADZU corporation, Kyoto, Kyoto, Japan Introduction In brain MR imaging, both T2 weighted sequence and Fluid Attenuated Inversion Recovery(FLAIR) sequence are widely used at most hospitals. Currently, the FLAIR sequence is usually used in addition to the T2 weighted sequence, and it is expected to provide additional information. In this...

PURPOSE To assess whether contrast-enhanced T1-weighted MR Cholangiography may provide additional information in the evaluation of biliary complications in orthotopic liver transplant recipients. MATERIAL AND METHODS Eighty liver transplant patients with suspicion of biliary adverse events underwent MR imaging at 1.5 T scanner. After acquisition of axial T1-/T2-weighted images and conventiona...

Magnetic resonance imaging revealing abnormally high signal intensity in the thoracic cord, extending from T5 to T10 on a sagittal T2-weighted image (Figure 1A). An axial T2-weighted image showing "owl's eye sign" involving central-anterior cord (Figure 1B), which was consistent with anterior spinal cord syndrome.

OBJECTIVE To identify the optimal pulse sequence for ferumoxides-enhanced magnetic resonance (MR) imaging in the detection of hepatocelluar carcinomas (HCCs). MATERIALS AND METHODS Sixteen patients with 25 HCCs underwent MR imaging following intravenous infusion of ferumoxides. All MR studies were performed on a 1.5-T MR system, using a phased-array coil. Ferumoxides (Feridex IV) at a dose of...

Picture 1. Difusion-weighted image (TR4500, TE105) showed a hyperintense lesion in the left striatum and multiple smal hypointense lesions in the brain stem, the cerebelum, and the thalamus (Picture 1 A-D). Gradient-echo T2*-weighed image (TR540, TE18) demonstrated multiple hypointense lesions in the same areas as the DWI showed multiple hypointense lesions (Picture 1 EH). T2-weighted image (TR...

PURPOSE To evaluate existing methods of standardization by exploiting the well-known tissue characterizing property of magnetization transfer ratio (MTR) values obtained from MT imaging, and compare the tissue characterizability of standardized T2, proton density (PD), and T1 images against the MTR images. MATERIALS AND METHODS Image intensity standardization is a postprocessing method that w...

BACKGROUND The multi-contrast assessment of the carotid artery wall has become an important diagnostic tool for the characterization of atherosclerotic plaque and vessel wall thickening. For providing the required T1-, T2-, and proton density weighted contrast, multi-slice turbo spin echo (TSE) techniques are normally applied. The straightforward extension of the TSE techniques to volumetric im...