P4B-5 The Role of Local Center Frequency Estimation in Doppler-Based Strain Imaging

2007 ◽  
Author(s):  
H. Xie ◽  
T. Gauthier ◽  
A. T. Fernandez
Keyword(s):  
Frequency Estimation ◽  
Strain Imaging ◽  
Center Frequency ◽  
Local Center

An Integrated Two-Mode Tunable Channelized Low-Noise Active Filter

2018 ◽  
Vol 27 (06) ◽  
pp. 1850090
Author(s):  
Amin Alahyari ◽  
Massoud Dousti ◽  
Mohammad Bagher Tavakoli
Keyword(s):  
Bandpass Filter ◽  
Impedance Matching ◽  
Low Noise ◽  
Active Filter ◽  
Center Frequency ◽  
Pass Filter ◽  
Filter Output ◽  
Band Stop Filter ◽  
Circuit Input

In this paper, a new structure for an integrated channelized active filter is proposed. This filter can be used as a channelized bandpass filter and again as a channelized band-stop filter. This is fulfilled by using one biasing voltage. In designing a three-channel bandpass filter, a recursive differential structure is used. Moreover, by subtracting bandpass filter output from an all-pass output, the proposed three-channel band-stop filter is achieved. A wideband amplifier plays the role of an all-pass filter. In addition, to decrease the noise of this filter, a noise-canceling circuit is adopted. By using this circuit, input impedance matching is obtained simultaneously. The center frequencies of the two-mode channelized filter are 2, 4 and 6[Formula: see text]GHz. In each of them, the center frequency is controlled via two biasing voltages. The maximum center frequency shift is 450[Formula: see text]MHz. For designing the proposed circuit, GaAs 0.15[Formula: see text][Formula: see text]m technology is applied. The occupied area is [Formula: see text][Formula: see text]mm2.

Emerging Clinical Role of Strain Imaging in Echocardiography

2010 ◽  
Vol 19 (3) ◽  
pp. 161-174 ◽  
Author(s):  
Dominic Y. Leung ◽  
Arnold C.T. Ng
Keyword(s):  
Strain Imaging ◽  
Clinical Role

scholarly journals The role of the image phase in cardiac strain imaging

2015 ◽  
Author(s):  
M. Alessandrini ◽  
A. Basarab ◽  
M. De Craene ◽  
M. Sermesant ◽  
H. Liebgott ◽  
...  
Keyword(s):  
Strain Imaging ◽  
Cardiac Strain
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