BACKGROUND AND PURPOSE Diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) maps provide information at MR imaging that may reflect cell attenuation and integrity. We hypothesized that cerebellar tumors in children can be differentiated by their ADC values. METHODS Brain MR imaging studies that included ADC maps were retrospectively reviewed in 32 patients with histologic...

Diffusion weighted magnetic resonance imaging (DW-MRI) technique probing the microscopic movement of water molecules in tissue, allows for quantification diffusivity and contribution perfusion to total amount water. In last decades, its use organs other than brain has increased it successfully been applied abdominal organs; otherwise DWI assessment (by measuring fraction edema apparent diffusio...

Previous researchers obtained various apparent diffusion coefficient (ADC) cutoff values to differentiate endometrial carcinoma from benign mimickers with 1.5T magnetic resonance imaging (MRI). Few studies have used 3T MRI or validated the effectiveness of these cutoff ADC values prospectively. This study was designed in two stages to obtain a cutoff ADC value at 3T MRI and to validate prospect...

For a class of uncertain nonlinear multivariable discrete time dynamic systems, an adaptive decoupling controller (ADC) is presented, which can deal with the case that the zero dynamics (ZD) of the system is not asymptotically stable. The ADC developed is composed of a linear robust ADC, a neural network (NN) nonlinear ADC and a switching mechanism. The linear robust ADC can assure the bounded-...

conclusion the dwmri is a useful technique for evaluating activity of fistulas with abscess. perianal fistula visibility is greater with combined t2wi and dwmri than t2wi alone. patients and methods fifty-three patients with 56 perianal fistulas were included in the current retrospective study. the t2-weighted imaging (t2wi) and dwmri were performed and apparent diffusion coefficient (adc) valu...

depicted on T2WI, ADC map, and fused FDG-PET (top row, arrow). Dynamic 18F-FDG PET images reconstructed at multiple time-points during 30 minute acquisition demonstrate progressive FDG uptake (bottom row). Hybrid PET/MRI incorporating Dynamic 18F-FDG PET Imaging: Correlation with Biopsy Findings-Preliminary Observations Andrew B Rosenkrantz, Anne-Kristin Vahle, Christian Geppert, Christopher Gl...

OBJECTIVE To evaluate the differences in the apparent diffusion coefficient (ADC) measurements based on three different region of interest (ROI) selection methods, and compare their diagnostic performance in differentiating benign from malignant orbital tumors. MATERIALS AND METHODS Diffusion-weighted imaging data of sixty-four patients with orbital tumors (33 benign and 31 malignant) were re...

This paper describes a new highly accurate fast selfcontained sonar sensor. Transmission and echo analysis are performed at repetition rates exceeding 27 Hz for ranges to 5.4 metres. The sensor contains low noise variable gain preamplifiers, two 1 MHz 12 bit ADC receivers and a DSP echo processor. Optimal arrival time estimation is performed by the DSP using matched filtering of echoes with sho...

In this paper, a robust cyclic ADC architecture with βencoder is proposed and circuit scheme using switched-capacitor (SC) circuit is introduced. Different from the conventional binary ADC, the redundancy of proposed cyclic ADC outputs β-expansion code and has an advantage of error correction. This feature makes ADC robust against the offset of comparator capacitor mismatch and finite DC gain o...

BACKGROUND AND PURPOSE Differentiating between primary cerebral lymphoma and glioblastoma multiforme (GBM) based on conventional MR imaging sequences may be impossible. Our hypothesis was that there are significant differences in fractional anisotropy (FA) and apparent diffusion coefficient (ADC) between lymphoma and GBM, which will allow for differentiation between them. MATERIALS AND METHOD...