BACKGROUND The aim of this study was to evaluate and compare the accuracy of diffusion-weighted imaging (DWI), apparent diffusion coefficient (ADC) value, and time-intensity curve (TIC) type analysis derived from dynamic contrast-enhanced MR imaging (DCE-MRI) in differentiating benign from malignant adnexal masses. MATERIALS AND METHODS 47 patients with 56 adnexal masses (27 malignant and 29 ...

Owing to its high complexity the hardware development of a flash ADC of larger wordlength has always been a challenging issue. Being the fastest ADC available in practice, flash ADCs are the only solution for digitizing fast signals demanded by on-line real time digital processors. As computer designers have launched 64-bit machines into use, for real time processing applications they need word...

PURPOSE To evaluate the diagnostic contribution of diffusion-weighted magnetic resonance imaging (MRI) using apparent diffusion coefficient (ADC) values to the characterization of hepatic masses and differentiation of benign and malignant lesions. MATERIALS AND METHODS The study included 30 patients that underwent upper abdominal MRI examinations because of hepatic masses that were found to b...

BACKGROUND Diffusion-weighted imaging (DWI) is a noninvasive method for investigation of tumor histological content. It has been applied for some musculoskeletal tumors and reported to be useful. OBJECTIVES The aim of the present study was to prospectively evaluate the apparent diffusion coefficient (ADC) values of benign and malignant soft tissue tumors and to determine if ADC can help diffe...

PURPOSE To investigate the effect of fat infiltration on the apparent diffusion coefficient (ADC) of liver, and assess the relationship between ADC and hepatic fat fraction (HFF). MATERIALS AND METHODS MRI scans of 120 consecutive patients were included in this retrospective study. Of these, 42 patients were included in the fatty liver group and 78 in the control group. ADC values were measur...

Prior research has acknowledged the merits of firms' post-entry speed internationalization (PSI) for export performance. However, remarkably little attention been devoted to transformational mechanisms that enable firms convert their PSI into performance outcomes. Drawing on capability-building perspective, we examine mediating role two key firm-specific capabilities, i.e., knowledge capability...

The authors present a low-power area-efficient subarray beamforming receiver (RX) structure for miniaturized 3-D ultrasound imaging system. Given that the delay-and-sum (DAS) and digitization functions consume most of area power in receiver, successive approximation register (SAR) analog-to-digital converter (ADC) shares its capacitive digital-to-analog (CDAC) with delay cells. As result, cells...

A high resolution analog to digital converter (ADC) is presented and it’s dedicated to neural recording systems. By employing two continuous time incremental sigmadelta(I∑∆) ADC in a pipeline configuration, without sacrificing the conversion rate the proposed ADC can obtain high resolution. This two-step architecture is furthermore power efficient, as the resolution need for the incremental ADC...

BACKGROUND AND PURPOSE Intramedullary high signal intensity on T2-weighted imaging was frequently observed in patients with CSM, although this finding does not well correlate with severity or prognosis of CSM. Instead of this nonquantitative information, another measure for CSM is desired. The work was focused primarily on assessing the relationships between ADC values and clinical and radiolog...

In this paper, a Novel Hybrid ADC consisting of two-step quantizer which has Flash ADC and SAR ADC along with Resistor String DAC is designed and implemented. This Hybrid ADC improves the speed by employing Flash ADC and resolution and power reduction can be achieved by utilizing SAR ADC. The Hybrid architecture carrying 12 bits as resolution, input frequency as 100MHz and sampling frequency is...