Research And Implementation Of Performance Evaluation Software For Digital Radiography System

Among plenty of radiographic detection technologies,digital radiography has been widely used due to its high work efficiency,good imaging quality and the use of computers to store images more environmentally friendly,and plays an important role in the fields of industry and medicine.The quality of the digital radiography system will directly affect the imaging effect,and further affect the detection results and the development of related work,so it becomes very necessary and important to evaluate the performance of the system.At present,there are very few software to evaluate the performance of the system.Therefore,this paper studies and implements a performance evaluation software for the digital radiography system based on C++and Qt framework.The software is composed of three modules:man-machine information management,performance parameter calculation and calculation result management.In the module of performance parameter calculation,five parameters can be calculated:basic spatial resolution,achievable contrast sensitivity,lag,burn-in and internal scatter radiation.Aiming at the calculation process of basic spatial resolution,an automatic calculation method is proposed in this paper.The algorithm includes two parts:imaging area segmentation of the duplex wire image quality indicator and gray value processing of the imaging area.The second part includes the segmentation of 13 sets of line-pair gray-scale intervals and the peak and valley search within the interval.In this paper,the method of combining sliding window and threshold value is adopted when dividing the interval between lines.By comparison with other methods,this method has better effect and adaptability.Finally,based on the requirement analysis and related algorithm research of the target software,this paper carries out a detailed design and implementation around the functions of its three major modules,and then carries out functional tests.The result proves that this software fulfills the basic requirements for the performance evaluation of digital radiography system,and its function and performance are in line with expectations.It plays a role in improving the level of automation in the field of digital radiography.