This prospective study was designed to assess CT performance by using the task-based image quality assessment and identify influence of iterative reconstruction (IR) algorithm, tube potential pitch factor selection on dose during Computed Tomography Pulmonary Angiography (CTPA) examination. An phantom, Catphan-600 utilized in this for assessing CTPA protocols under 128-multislice scanner (Phili...

We report on the use of a novel constrained optimisation algorithm for calibrating finite element model in an eddy current inspection application. An accurate forward is often important such applications training neural networks or as part iterative solver. However, subject calibration has not received much attention literature to date. consider multi-frequency, depth profiling application, whi...

This paper presents a novel approach to single channel speech enhancement in noisy environments. Widely adopted noise reduction techniques based on the spectral subtraction are generally expressed as a spectral gain depending on the signal-to-noise ratio (SNR) [1]–[4]. As the estimation method of the SNR, the well-known decision-directed (DD) estimator of Ephraim and Malah efficiently is known ...

OBJECTIVE To assess the image quality of aorta obtained by dual-source computed tomography angiography (DSCTA), performed with high pitch, low tube voltage, and low iodine concentration contrast medium (CM) with images reconstructed using iterative reconstruction (IR). METHODS One hundred patients randomly allocated to receive one of two types of CM underwent DSCTA with the electrocardiogram-...

In the present paper‎, ‎we propose an iterative algorithm for‎ ‎solving the generalized $(P,Q)$-reflexive solution of the quaternion matrix‎ ‎equation $overset{u}{underset{l=1}{sum}}A_{l}XB_{l}+overset{v} ‎{underset{s=1}{sum}}C_{s}widetilde{X}D_{s}=F$‎. ‎By this iterative algorithm‎, ‎the solvability of the problem can be determined automatically‎. ‎When the‎ ‎matrix equation is consistent over...

Iterative decoding of turbo codes, as well as other concatenated coding schemes of similar nature, requires accurate knowledge of the signal-to-noise ratio of the channel so that proper blending of the a posteriori information of the separate decoders is achieved. In this paper, we study the sensitivity of decoder performance to mis-estimation of the SNR, and propose a simple on-line scheme tha...