This document proposes using multiple line transmission (MLT) beamforming to increase frame rate in echocardiography without compromising spatial resolution or signal-to-noise ratio. MLT transmits multiple focused beams simultaneously using an apodization scheme and combining transmission patterns with proper delays and amplitudes. This allows increasing frame rate by lowering the number of transmit events per frame compared to traditional methods. The document tests MLT beamforming on phantoms and volunteers to evaluate image quality quantitatively and qualitatively compared to single line transmission beamforming.

2. ABSTRACT
 High frame rate (HFR) echocardiography may be of
benefit for functional analysis of the heart
 HFR is obtained using multi-line acquisition (MLA)
which typically requires broadening of transmit beams
 The capacity of MLA to obtain high quality HFR
images remains limited
 The ultrasound advanced open plat-form, equipped
with a 2.0 MHz phased array, was programmed to
interleave MLT and conventional single line transmit
(SLT) beam forming
 Using these two beam forming methods, images of
phantoms and healthy volunteers were acquired and
investigated both qualitatively and quantitatively

3. Existing System
 Isovolumetric contraction relaxation which may
contain diagnostic or prognostic information.
Ultimately, the frame rate in ultrasound imaging is
defined by the speed of sound in soft tissue in
combination with the physical dimension of the organ
to be visualized
 For a given field-of-view, the frame rate can only be
increased by lowering the number of transmit events
per frame

4. Disadvantage
 To this purpose parallel receive beam forming is
commonly employed in most of the (high-end)
ultrasound scanners
 To avoid typical block-like artifacts, this technique
typically requires broadening the transmit beams
when reconstructing a large number of MLA beams
resulting in a degradation of the spatial resolution and
the signal-to-noise ratio
 A broadened transmit beam by definition spreads
energy over a larger area making harmonic imaging
difficult or even impossible

5. Proposed Systems
 multiple focused beams can be transmitted into different
directions simultaneously
 The apodization scheme, an MLT system has the potential
to increase the frame rate without significantly
compromising the spatial resolution or SNR
 The simultaneous transmission of multiple focused beams,
in fact, requires linearly combining the transmission
patterns, each characterized by proper delays and
amplitudes, corresponding to each of the desired beams.
An independent arbitrary waveform generator (AWG) is
thus needed for each active element of a phased array

6. Block Diagram
ultrasound advanced open
platform Input image
MLT beam forming
In vitro Recordings & In Vivo
Recordings
Imaging Strategy Design
Output cardiac imaging

7. Software & HARDWARE
HARDWARE
 Core 2 Duo Processor and above
 2 GB RAM
 256 GB HD
 Keyboard & Mouse
SOFTWARE
 Microsoft windows 7 above
 Dotnet 2008