Research Of High Quality Far Focus Ultrasound Imaging Algorithms And Image Quality Evaluation Software Design

Ultrasound imaging equipment is one of the most common equipment in modern medical imaging equipment.Ultrasound imaging has been widely used in the examination and diagnosis of diseases,due to its characteristics of simple operation and real-time imaging.With the application and development of modern medicine,the quantity and performance requirements of ultrasound imaging equipment in different clinical fields have been greatly improved.Therefore,researchers are constantly exploring ultrasound imaging technology to improve the image quality,and then improve the overall performance of ultrasound imaging equipment.At the same time,as the ultrasound imaging equipment is put into clinical application,it is particularly important to ensure the quality of ultrasound imaging by the regularly performing quality control and evaluation of the equipment.Therefore,this thesis mainly studies improving the image quality of ultrasound imaging equipment and the quality control and evaluation of ultrasound imaging equipment.Firstly,this thesis proposes a far focus ultrasound imaging algorithm based on the adaptive adjustment of zero-crossing factor(ZF)to improve the quality of ultrasound imaging.Based on the original ZF,the coherence factor(CF)was first used as the adjustment coefficient to adjust ZF to form a new adaptive weighting factor,CFa ZF.Then the generalized coherence factor(GCF)was used as the adjustment coefficient to adjust ZF to form a new adaptive weighting factor,GCFa ZF.According to the simulation and experimental results,compared with the CF weighted algorithm,the GCF weighted algorithm and the ZF(δ= 0.6),ZF(δ= 0.8),ZF(δ= 0)of the ZF weighted algorithm,the new CFa ZF and GCFa ZF weighted algorithms can effectively improve the contrast of background tissue image and further improve the quality of ultrasound imaging.Additional,a software system is designed and developed for the quality control and evaluation of ultrasound imaging equipment.The system can measure the performance indexes of ultrasound imaging equipment,such as lateral resolution,axial resolution,blind area and detection depth.According to the probe type and transmission frequency,it can evaluate whether the ultrasound imaging equipment meets the national standards,so as to ensure the quality of ultrasound imaging.