Design Of Static Digital Mammary Machine Timing Control System Based On FPGA

Since the 21 st century,breast cancer has become the highest incidence of cancer in women today.For the diagnosis and treatment of this disease,a static digital breast machine was born.In this paper,after analyzing the advantages and disadvantages of the mainstream breast CT machines at home and abroad,the light source system is improved,and carbon nanotubes are used as cathode materials for static digital mammography airport emission.Compared with the traditional single-source hot cathode structure,it has the advantages of no delay,low operating temperature,low power consumption and fast response speed.The static digital mammography machine can increase the resolution of the image acquired by the detector,the exposure time is controllable,and the radiation dose to the patient can be reduced.Firstly,the field emission structure and principle of carbon nanotubes are introduced.The principle of multi-beam X-ray field emission based on reed relays and IGBT is introduced respectively.The scanning principle of this static digital mammography machine is also emphatically analyzed.Then the FPGA-based static digital mammary machine timing control system is designed.The hardware circuit design module uses Altera's Cyclone ? EP4CE10F17C8N as the main control chip.The hardware of the mammary system hardware module is controlled by the abundant logic resources and IO interfaces of the FPGA.The hardware module controls the emission of 25 distributed carbon nanotube X-ray units at a pre-timing,enabling the real-time control of the detector to acquire images of the lesion area.The software part is divided into two parts:main program and test program.Quartus ? is used as the development platform.The hardware description language Verilog HDL can be used to control the transmission and exchange of static digital mammography data,set the duty cycle of X-ray ray emission,and achieve the actual implementation of one of the 25 channels of pulse signal trigger signal.Finally,the multi-channel pulse module and synchronous trigger module in the digital breast mammography timing control system are verified in real time,and the image of the lesion region is acquired by the detector to analyze the data.