نتایج جستجو برای: adc map
تعداد نتایج: 201565 فیلتر نتایج به سال:
BACKGROUND We tested the feasibility of a simple method for assessment of prostate cancer (PCa) aggressiveness using diffusion-weighted magnetic resonance imaging (MRI) to calculate apparent diffusion coefficient (ADC) ratios between prostate cancer and healthy prostatic tissue. METHODS The requirement for institutional review board approval was waived. A set of 20 standardized core transperi...
OBJECTIVE To investigate the utility of apparent diffusion coefficient (ADC) measurement in the diagnosis of chronic viral hepatitis (CVH) and correlation between ADC values and histopathologic severity of CVH. MATERIALS AND METHODS The ADC values of liver parenchyma on diffusion-weighted magnetic resonance imaging (DWMRI) were measured in 50 patients with a history of CVH and 51 healthy subj...
Four techniques for digital background calibration of SAR ADC are presented and compared. Sub-binary redundancy is the key to the realization of these techniques. Some experimental and simulation results are covered to support the effectiveness of these techniques. Keywords—SAR ADC, digital background calibration, DAC mismatch, bit weight, sub-binary redundancy
In this paper, Threshold Inverter Quantizer (TIQ) is a novel idea which can effectively replace the reference voltage generator, resistive/capacitive divider network and array of differential comparators in conventional flash Analog to Digital Converter (ADC) by an internal comparator constructed Complementary Metal Oxide Semiconductor (CMOS) inverters. The inverter threshold serving as voltage...
Expressions for the calculation of rotatory strengths using algebraic diagrammatic construction (ADC) scheme polarization propagator in both length and velocity gauges have been implemented. This enables simulation electronic circular dichroism (ECD) spectra at ADC level up to third order perturbation theory. The ADC(n) methods produce comparable accuracy those obtained with coupled cluster cor...
This brief paper describes a background calibration algorithm for a pipelined ADC with an open-loop amplifier using a Split ADC structure. The open-loop amplifier is employed as a residue amplifier in the first stage of the pipelined ADC to realize low power and high speed. However the residue amplifier as well as the DAC suffer from gain error and non-linearity, and hence they need calibration...
In this paper, design of low power, 9-bit pipeline ADC architecture is introduced .A pipeline ADC architecture has a 3-stage pipeline ADC with 3-bit flash ADC followed by a 3-bit DAC at each stage. A novel approach to design a 3-bit ADC is implemented; this design offers less number of comparator and low power consumption with less circuit complexity based on this idea a 9-bit ADC is simulated ...
A procedure for the ileostomisation of adult roosters has been described with the use of flexible silicon cannulas. Apparent ileal digestibility coefficients for dry matter (aDC DM), crude protein (aDC CP) and amino acids (aDC AA) in six diets, formulated with maize, wheat gluten, faba beans, lupins, soybean meal and casein as the main protein sources were determined in the ileostomised rooster...
In recent years, magnetic resonance imaging (MRI) with diffusion-weighted imaging (DWI) has seen wide clinical use, such as for early detection of cerebrovascular diseases and whole body screening for tumors. The apparent diffusion coefficient (ADC) standard phantom, which mimics the ADC values of several lesions in the body, is indispensable for the development of new pulse sequences for DWI, ...
Study on Range-Doppler Imaging Using Stepped-Carrier OFDM Waveforms with a Nonlinear Hopping Pattern
To increase the range resolution of OFDM radars, a wide bandwidth baseband signal is required, which increases ADC/DAC sampling rate. Although radar processing with linear stepped-carrier (SC) waveforms has been developed to overcome it, pattern in subband allocation does not provide flexibility spectrum utilization. In this study, we proposed range-Doppler (RD) imaging method using SC nonlinea...
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