title: [Research and realization of signal processing algorithms based on FPGA in digital ophthalmic ultrasonography imaging].
abstract: OBJECTIVE
  To design and improve signal processing algorithms of ophthalmic ultrasonography based on FPGA.
  
  
  METHODS
  Achieved three signal processing modules: full parallel distributed dynamic filter, digital quadrature demodulation, logarithmic compression, using Verilog HDL hardware language in Quartus II.
  
  
  RESULTS
  Compared to the original system, the hardware cost is reduced, the whole image shows clearer and more information of the deep eyeball contained in the image, the depth of detection increases from 5 cm to 6 cm.
  
  
  CONCLUSIONS
  The new algorithms meet the design requirements and achieve the system's optimization that they can effectively improve the image quality of existing equipment.
authors.forename: Simin
authors.initials: S
authors.lastname: Fang
authors.forename: Sheng
authors.initials: S
authors.lastname: Zhou
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Wang
authors.forename: Qingsheng
authors.initials: Q
authors.lastname: Ye
authors.forename: Ling
authors.initials: L
authors.lastname: Tian
authors.forename: Jianjun
authors.initials: J
authors.lastname: Ji
authors.forename: Yanqun
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000465:Algorithms; D044962:Data Compression; D003952:Diagnostic Imaging; D009885:Ophthalmology; D012815:Signal Processing, Computer-Assisted; D014463:Ultrasonography