PURPOSE To compare a three-dimensional Fourier transform (3DFT) gradient-echo pulse sequence with magnetization transfer at a short echo time against standard 3DFT gradient-echo technique in the evaluation of cervical spondylosis, specifically addressing the effects of motion and susceptibility artifacts on the dimensions of the neural foramina and contrast at the cerebrospinal fluid (CSF)-spin...

Although largely different concepts, echo state networks and compressed sensing models both rely on collections of random weights; as the reservoir dynamics for echo state networks, and the sensing coefficients in compressed sensing. Several methods for generating the random matrices and metrics to indicate desirable performance are well-studied in compressed sensing, but less so for echo state...

In mobile communications, speech is often degraded by ambient noise and acoustic echo. Both problems have attracted a high level of research interest over the last decades. Recently dual channel solutions for noise reduction have been investigated and can yield better performance than single channel solutions. This paper presents an analysis of the echo problem based on recordings with a handsf...

Magnetic resonance imaging (MRI) based on gradient echoes is used in a wide variety of imaging techniques and clinical applications. Gradient echo sequences form the basis for an essential group of imaging methods that find widespread use in clinical practice, particularly when fast imaging is important, as for example in cardiac MRI or contrast-enhanced MR angiography. However, the term "gradi...

PURPOSE To compare conventional T2-weighted spin-echo imaging with a rapid acquisition relaxation enhanced (RARE) technique in the routine evaluation of lumbar degenerative disk disease. METHODS Thirty consecutive patients referred for evaluation of the lumbar spine for suspected degenerative disk disease were evaluated with sagittal and axial T1-weighted spin-echo, conventional T2-weighted s...

In this paper, joint structures for audio coding and echo cancellation are investigated, utilizing standard audio coders. Two types of audio coders are considered, coders based on cosine modulated filterbanks and coders based on the modified discrete cosine transform (MDCT). For the first coder type, two methods for combining such a coder with a subband echo canceler are proposed. The two metho...

Results For the global EF, Bland-Altman analysis showed significantly higher agreement between CT and MRI (p 0.005, 95% confidence interval: 14.2%) than for CVG ( 20.2%) and 3D Echo ( 21.2%). Only CVG (59.5 13.9%, p 0.03) significantly overestimated EF in comparison with MRI (55.6 16.0%). CT showed significantly better agreement for stroke volume than 2D Echo, 3D Echo, and CVG. In comparison wi...

When we talk with hands-free in a car or noisy lobby, the performance of the echo canceller degrade because background noise added to echo caused by the distance from mouth to microphone is relatively long. It gives a reason for necessity of noise-robust and high convergence speed adaptive algorithm. And if acoustic echo canceller operated not perfectly, residual signal going through the echo c...

1 Al-Falah School Of Engg. &Tech., Hayarana, India 2 Al-Falah School Of Engg. &Tech., Hayarana, India 3 ECE, SDEC, MTU,Noida,(India) Abstract: Communication technology has advanced to the point where teleconferences that use communication lines to connect remote conference rooms are taking place every day. The use of a centralized acoustic echo canceller in the mobile switching center of a GSM ...