Event Details
CANCELLED: Fixed-Point Hardware Design for CPWC Image Reconstruction
Presenter: Ji Shi
Supervisor:
Date: Thu, March 19, 2020
Time: 12:30:00 - 13:30:00
Place: EOW 230
ABSTRACT
Coherent plane-wave compounding (CPWC) ultrasonography is an important imaging modality that allows for very high frame rates. During CPWC image reconstruction, computationally expensive delay-and-sum beamforming can be replaced by faster Fourier-domain remapping. This seminar deals with the MATLAB and hardware implementation of one of the recently proposed Fourier-domain CPWC reconstruction methods, namely, plane-wave (PW) Stolt's migration algorithm.
We
present the floating- and
fixed-point implementations of the said migration algorithm in MATLAB, and perform quantitative evaluation of the reconstruction results, showing that it is feasible to obtain high-quality compounded images using hardware-oriented scaled
fixed-point calculations, as opposed to more expensive software-oriented floating-point arithmetic. We also generate Xilinx FPGA-based implementations of both floating- and
fixed-point MATLAB-based algorithms, using a high-level synthesis (HLS) design flow that collaboratively employs MATLAB Coder and Vivado HLS tools. Results show that our
fixed-point FPGA implementation is more efficient in terms of resource, timing, and power compared to its floating-point counterpart.