PURPOSE To investigate the utility of dynamic contrast-enhanced gradient-echo MR imaging of head and neck lesions and to compare this technique with the commonly used spin-echo contrast-enhanced fat-saturation technique. METHODS Twenty-two patients with a total of 23 head and neck neoplasms underwent dynamic gradient-echo and spin-echo MR imaging studies. The spin-echo and dynamic gradient-ec...

In this paper a generalized postfilter algorithm design issues are presented. This postfilter is used to jointly suppress late reverberation, residual echo, and background noise. When residual echo and noise are suppressed, the best result obtains by suppressing both interferences together after the Acoustic echo cancellation (AEC). The main advantage of this approach is that the residual echo ...

Echocardiography is an essential investigation for cardiology services, with its activity directly correlated to cardiothoracic activity, morbidity, and mortality. Much research has been undertaken show that most New Zealand echo departments are under performing. Three key areas highlighted in this presentation: training, allocated scan times, sonographer call duties. proposals make the three a...